Q- Flux is used to
(a) remove silica
(b) remove silica and undesirable metal oxide
(c) remove all impurities from ores
(d) reduce metal oxide
Ans: (b)
Q- Which of the following metal does not show variable valance?
(a) Pb
(b) Ba
(c) Cu
(d) None of the above
Ans: (b)
Q- The active metals are extracted from their ores by the process of reduction with
(a) hydrogen
(b) carbon
(c) electric current
(d) aluminium
Ans: (c)
Q- Rocky impurities present in a mineral are called
(a) flux (b) gangue
(c) matte (d) slag
Ans: (b)
Q- A naturally occuring substance from which a metal can be profitably extracted is called
(a) mineral (b) gangue
(c) ore (d) flux
Ans: (c)
Q- Which of the following is an ore of sodium?
(a) Chile saltpetre
(b) Carnallite
(c) Sylvine
(d) None of the above
Ans: (a)
Q- Lithium can react with water but cannot fuse in it due to
(a) high boiling point
(b) high melting point
(c) low boiling point
(d) low melting point
Ans: (b)
Q- The man-made transition element is
(a) Zr (b) Tc
(c) Sc (d) Hf
Ans: (b)
Q- The element which has highest density is
(a) Pd (b) Pt
(c) W (d) Os
Ans: (d)
Q- Silver metal is obtained by
(a) Parke’s process
(b) Froth floatation process
(c) Carbon reduction process
(d) Magnetic separation
Ans: (a)
Q- Which one of the following has coloured ion?
(a) Cu+ (b) Ag+
(c) Zn+ (d) Ni++
Ans: (d)
Q- Cinnabar is an ore of
(a) Ag (b) Au
(c) Zn (d) Hg
Ans: (d)
Q- Which one of the following does not form amalgam?
(a) Ag (b) Cu
(c) Fe (d) Zn
Ans: (c)
Q- An aqueous solution of copper sulphate is acidic in nature because the salt undergoes
(a) dialysis (b) electrolysis
(c) hydrolysis (d) photolysis
Ans: (c)
Q- Which one of the following materials is very hard and very ductile?
(a) Carborundum
(b) Tungsten
(c) Cast iron
(d) Nichrome
Ans: (d)
Q- Carbon decomposes potassium carbonate into
(a) C (b) O
(c) KCN (d) K
Ans: (d)
Q- Which of the following compounds transforms baking soda into baking powder?
(a) KHCO3 (b) NaHCO3
(c) KHC4H4O6 (d) KCl
Ans: (c)
Q- Which metal is obtained by amalgamation process?
(a) Ag (b) Al
(c) Cu (d) Hg
Ans: (a)
Q- Perchloric acid is prepared by the action of concentrated sulphuric acid on
(a) potassium perchlorate
(b) barium chlorate
(c) barium chloride
(d) sodium chloride
Ans: (a)
Q- Which of the following elements are analogous to the lanthanides?
(a) Borides (b) Carbides
(c) Hydrides (d) Actinides
Ans: (d)
Q- Which is based on the phenomenon of hydrolysis is called
(a) poling
(b) liquation
(c) hydrometallurgy
(d) electrorefining
Ans: (d)
Q- Which one of the following statements is correct?
(a) Liquid sodium is employed as a coolant in nuclear reactors
(b) Calcium carbonate is an ingredient of toothpaste
(c) Bordeaux mixture consists of sodium sulphate and lime
(d) Zinc amalgams are used as a dental filling
Ans: (a)
Q- Most of the explosions in mines occur due to the mixing of
(a) hydrogen with oxygen
(b) oxygen with acetylene
(c) methane with air
(d) carbon dioxide with ethane
Ans: (b)
Q- A common metal used for the extraction of metals from their oxides by reduction is
(a) Fe (b) Al
(c) Cr (d) Co
Ans: (b)
Q- What happens when Fe metal is rusted?
(a) Iodised
(b) Oxidised
(c) Ionised
(d) None of the above
Ans: (b)
Q- The purpose of smelting an ore to
(a) reduce it
(b) oxide it
(c) obtain an alloy
(d) separate volatile impurities
Ans: (a)
Q- The most reactive metal in the universe is
(a) Na (b) K
(c) Al (d) Zn
Ans: (b)
Q- The froth flotation process is used for the concentration of
(a) oxide ores
(b) sulphide ores
(c) halide ores
(d) silicate ores
Ans: (b)
Q- Heating of pyrites in air to remove sulphur is known as
(a) roasting (b) calcination
(c) smelting (d) fluxing
Ans: (a)
Q- In electro-refining the impure metal is made
(a) cathode
(b) anode
(c) both
(d) None of the above
Ans: (d)
Q- Copper pyrites (CuFeS2) are concentrated by
(a) electromagnetic method
(b) gravity method
(c) froth flotation method
(d) All of the above
Ans: (c)
Q- In the electrolytic refining of a metal
(a) crude metal is made anode
(b) crude metal is made cathode
(c) crude ore is made cathode
(d) crude ore is made anode
Ans: (a)
Q- In metallurgy flux is a substance used to convert
(a) infusible impurities to fusible material
(b) soluble impurities to insoluble impurities
(c) fusible impurities to infusible impurities
(d) mineral to silicate
Ans: (a)
Q- Which one of the following ores contains both calcium and magnesium?
(a) Limestone (b) Dolomite
(c) Epsom salt (d) Carnallite
Ans: (b)
Q- The metallurgical process in which metal is obtained in fused state is known as
(a) froth flotation process
(b) calcination
(c) roasting
(d) smelting
Ans: (d)
Q- The oxidation state of chromium in is K2Cr2O7 is
(a) +6 (b) +3
(c) +7 (d) +4
Ans: (a)
Q- Magnesium does not decompose in
(a) hot water
(b) steam
(c) semi-hot water
(d) cold water
Ans: (d)
Q- The oxidation number of Fe in Fe3O4 is
(a) +2 (b) 2/3
(c) +3 (d) 8/3
Ans: (d)
Q- The most common actinide is
(a) thorium (b) europium
(c) lanthanum (d) samarium
Ans: (a)
Q- Wrought iron is
(a) Iron mixed with 0.1 to 0.2% carbon
(b) Cast iron
(c) Alloy of steel
(d) Impure sulphide mineral
Ans: (a)
Q- The iron obtained from blast furnace is
(a) soft iron (b) pig iron
(c) steel (d) wrought iron
Ans: (b)
Q- Which one is known as magnetite?
(a) Fe2O3 (b) Fe2O3 .3H2O
(c) FeS2 (d) Fe3O4
Ans: (a)
Q- Which of the following is ferrous alloy?
(a) Invar (b) Solder
(c) Mangalium (d) Type steel
Ans: (a)
Q- The magnetic separation is used for increasing concentration of the following
(a) horn silver
(b) calcite
(c) haematite (d) magnesite
Ans: (c)
Q- Silver containing lead as an impurity is removed by
(a) Poling (b) Cupellation
(c) Lavigation (d) Distillation
Ans: (b)
Q- Corrosion is basically an
(a) interaction
(b) union between light metal and heavy metal
(c) electrochemical phenomenon
(d) altered reaction in presence of H2O
Ans: (c)
Q- The oil used in the flotation method for the purification of ores is
(a) coconut oil
(b) olive oil
(c) pine oil
(d) None of the above
Ans: (c)
Q- Annealing process is
(a) heating the steel bright red and then cooling slowly
(b) heating the steel to a temperature much below redness and cooling it slowly
(c) beating rods of iron embedded in charcoal powder
(d) heating steel to bright red and cooling suddenly
Ans: (a)
Q- Ferro silicon is used in steel industry as
(a) cutting tool
(b) alloying agent
(c) flux
(d) a reducing agent
Ans: (b)
Q- Which method is used for the purification of Bauxite ore?
(a) Magnetic separation
(b) Electrolysis
(c) Leaching
(d) Levigation
Ans: (c)
Q- When metallic copper comes in contact with moisture, a green powdery/pasty coating can be seen over it. This is chemically known as
(a) copper carbonate-copper sulphate
(b) copper sulphate-copper sulphide
(c) copper carbonate-copper hydroxide
(d) copper sulphide-copper carbonate
Ans: (c)
Q- What happens, when potassium fire in laboratory is extinguished by pouring water?
(a) Decrease in fire intensity
(b) Increase in fire intensity
(c) Fire is completely extinguished
(d) None of the above
Ans: (b)
Q- Gravity separation process may be used for concentration of
(a) Calamine (b) Chalcopyrite
(c) Haematite (d) Bauxite
Ans: (c)
Q- Which of the following metals corrodes in moist air?
(a) Au (b) Ag
(c) Ni (d) Fe
Ans: (d)
Q- The alum used for purifying water is
(a) potash alum
(b) chrome alum
(c) ferric alum
(d) ammonium alum
Ans: (a)
Q- The nature of an aqueous solution of FeCl2 is
(a) basic (b) acidic
(c) amphoteric (d) neutral
Ans: (b)
Q- Iron is manufactured form the ore
(a) Cryolite
(b) Bauxite
(c) Haematite
(d) Chalcopyrite
Ans: (c)
Q- Gold is extracted by hydrometallurgical process, based on its property
(a) of being electropositive
(b) of being less reactive
(c) to form complexes which are soluble
(d) to form salts which are water soluble
Ans: (c)
Q- Which metal shows more than one oxidation state?
(a) Na
(b) Mg
(c) Fe
(d) None of the above
Ans: (c)
Q- Purest form of iron is
(a) white cast iron
(b) grey cast iron
(c) wrought iron
(d) steel
Ans: (c)
Q- In the blast furnace, iron oxide is reduced by
(a) carbon
(b) carbon monoxide
(c) silica
(d) hot blast of air
Ans: (b)
Q- Mond’s process is used for preparing
(a) Ni (b) H2SO4
(c) NH3 (d) HNO3
Ans: (a)
Q- Number of water molecules present in Mohr’s salt is
(a) 4 (b) 5
(c) 6 (d) 8
Ans: (d)
Q- Which of the following statements is true?
(a) All ores are minerals
(b) All minerals are ores
(c) A mineral cannot be an ore
(d) An ore cannot be a mineral
Ans: (a)
Q- The process of converting hydrate Al2O3 into anhydrous aluminium is known as
(a) Smelting (b) Roasting
(c) Calcination (d) Dressing
Ans: (c)
Q- Transition metals
(a) are diamagnetic
(b) show inert pair effect
(c) do not form alloys
(d) show variable valency
Ans: (d)
Q- Certain (at. number 58) is a member of
(a) s-block elements
(b) p-block elements
(c) d-block elements
(d) f-block elements
Ans: (d)
Q- Why are stainless steel cooking pans fabricated with copper bottom?
(a) Copper is cheaper
(b) Conductivities of copper is more than the stainless steel
(c) Copper increases durability of the cooking pan
(d) Copper is a good reflector of heat
Ans: (b)
Q- The process of ore dressing is carried out to
(a) add flux to the mineral
(b) convert the ore to oxide
(c) removal of the siliceous materials
(d) remove the poisonous impurities
Ans: (c)
Q- Parke’s process is used
(a) to extract Cu using CuFeS2
(b) to extract Ag from argentiferrous lead
(c) to extract Ag by forming amalgam
(d) to extract Ag using NaCN
Ans: (b)
Q- Which is the used in storage batteries?
(a) Cu (b) Lead
(c) Tin (d) Zinc
Ans: (b)
Q- Tin and lead can be refined by
(a) Poling
(b) Liquation
(c) Bessemerisation
(d) Cupellation
Ans: (b)
Q- The substance used as an activator in froth flotation process is
(a) Pine oil
(b) Potassium ethyl xanthate
(c) Copper sulphate
(d) Sodium cyanide
Ans: (c)
Q- The element which is sometimes found in native state
(a) Al (b) Cu
(c) Fe (d) Mg
Ans: (b)
Q- The second most common element in the universe is
(a) H2 (b) N2
(c) O2 (d) Si
Ans: (d)
Q- When sodium and chlorine react
(a) energy released and ionic bond is formed
(b) energy released and covalent bond is formed
(c) energy absorbed and ionic bond is formed
(d) None of the above
Ans: (a)
Q- A process of very slow regulated cooling is known as
(a) annealing (b) diffusion
(c) quencing (d) sedimentation
Ans: (a)
Q- Purification of aluminium by electrolyte refining is known as
(a) Hoope’s process
(b) Serpeck’s process
(c) Hall’s process
(d) Baeyer’s process
Ans: (a)
Q- An important ore for iron is
(a) pitch blende (b) galena
(c) malachite (d) haematite
Ans: (d)
Q- Transition metals mostly are
(a) paramagnetic
(b) diamagnetic
(c) Both paramagnetic and diamagnetic
(d) Neither paramagnetic nor diamagnetic
Ans: (a)
Q- The atomic number (Z) of an element is 25. In its ground state, how many electrons are present in the ‘N’ shell?
(a) 2 (b) 3
(c) 13 (d) 15
Ans: (a)
Q- Misch metal is
(a) an alloy of copper
(b) an alloy of lanthanoid metal
(c) an alloy of aluminium
(d) a mixture of chromium and lead chromate
Ans: (b)
Q- Lanthanides and actinides resemble in
(a) oxidation state
(b) ionisation energy
(c) formation of complexes
(d) electron configuration
Ans: (d)
Q- MgCl2 .6H2O, when heated, gives
(a) magnesium hydride
(b) magnesium chloride
(c) magnesium oxide
(d) magnesium oxychloride
Ans: (b)
Q- Which of the following is the composition of carnallite?
(a) MgCl2 .KCl.6H2O
(b) Fe3O4
(c) Na3AlF6
(d) Na2Al2O3
Ans: (a)
Q- Highly pure dilute solution of sodium in liquid ammonia
(a) exhibits electrical neutrality
(b) produces sodium amide
(c) produces hydrogen gas
(d) shows blue colour
Ans: (d)
Q- Which of the following is not efflorescent?
(a) CuSO4 (b) NaOH
(c) Na2SO4 (d) MgSO4
Ans: (b)
Q- Cyanide process is used in the extraction of
(a) Cu (b) Al
(c) Zn (d) Ag
Ans: (d)
Q- Lunar caustic is
(a) NaOH (b) NaNO3
(c) AgNO3 (d) Ag2SO4
Ans: (c)
Q- The highest temperature is achieved in which type furnace?
(a) Blast (b) Reverberatory
(c) Electric (d) Muffle
Ans: (c)
Q- In blast furnace, iron oxide is reduced by
(a) silica (b) CO
(c) C (d) limestone
Ans: (b)
Q- An important constituent of amalgam is
(a) Al (b) Ag
(c) Hg (d) Mg
Ans: (c)
Q- Most abundant element on the earth’s crust by weight is
(a) Oxygen (b) Iron
(c) Silicon (d) Aluminium
Ans: (a)
Q- The tendancy of the transition elements to form coloured compounds is due to
(a) transition of electrons from s-orbitals of the outer shells to p-orbitals
(b) d-d transition in last but one orbit
(c) transition of electrons from one atom to the other
(d) None of the above
Ans: (b)
Q- Which metal has the lowest melting point?
(a) Hg (b) Sn
(c) Cs (d) Na
Ans: (a)
Q- When ore is heated generally in presence of air, then process is called
(a) smelting
(b) roasting
(c) calcination
(d) None of the above
Ans: (b)
Q- When ore is heated generally in absence of air then process is called
(a) calcination
(b) roasting
(c) smelting
(d) None of the above
Ans: (a)
Q- The mineral containing titanium occurring in India is
(a) Bauxite
(b) Dolomite
(c) Chalcopyrite
(d) Illmenite
Ans: (d)
Q- The salt which is least likely to be found in minerals is
(a) chloride (b) sulphide
(c) nitrate (d) sulphate
Ans: (c)
Q- Which one of the following elements shows highest oxidation state?
(a) Pt (b) Rh
(c) Os (d) Fe
Ans: (c)
Q- Transition elements are also known as
(a) s-block elements
(b) p-block elements
(c) d-block elements
(d) f-block elements
Ans: (c)
Q- The process of zone refining is used for
(a) Silicon (b) Gallium
(c) Germanium (d) All of these
Ans: (d)
Q- Van arkel method of purification of metals involves converting the metal to
(a) Volatile compound
(b) Non-volatile stable compound
(c) Volatile unstable compound
(d) None of the above
Ans: (a)
Q- Tempered steel is
(a) Hard and brittle
(b) Soft and malleable
(c) very soft
(d) Neither so hard nor so brittle
Ans: (d)
Q- Best quality steel is manufactured by using
(a) Crucible process
(b) Electrical process
(c) Bassemer’s process
(d) Simenes Martin’s method
Ans: (b)
Q- An alloy of ……….. is used in fountain pen nib tips.
(a) Pt-Ag (b) Pt-Au
(c) Pt-Ir (d) Pt-Cu
Ans: (c)
Q- The element present in haemoglobin of blood is
(a) Fe (b) Cu
(c) Na (d) Al
Ans: (a)
Q- In roasting the ores are generally converted into
(a) Metal oxides
(b) Metals
(c) Hydrated metal oxides
(d) None of the above
Ans: (a)
Q- In roasting
(a) no metal impurities are removed
(b) ore becomes porous
(c) moisture is removed
(d) All of the above
Ans: (d)
Q- Alloy is an example of
(a) Gel
(b) Aerosol
(c) Solid sol
(d) Emulsion
Ans: (c)
Q- Heating pyrites in air to remove sulphur is known as
(a) Bessemerisation
(b) Roasting
(c) Calcination
(d) Smelting
Ans: (b)
Q- Bauxite is concentrated by
(a) chemical method
(b) roasting
(c) froth flotation process
(d) magnetic separation
Ans: (a)
Q- Duralumin is an alloy of
(a) Al and Mg
(b) Al and Ni
(c) Al, Mg and Ni
(d) Al, Mg, Ni and Cu
Ans: (c)
Q- A certain metal M is used to prepare an antacid, which is used as a medicine for acidity. This metal accidently catches fire, which can not be extinguished by using CO2 based extinguishers. The metal M is
(a) Mg (b) Ba
(c) Be (d) Ca
Ans: (a)
Q- Galena ore is concentrated by
(a) gravity separation
(b) froth flotation process
(c) magnetic separation
(d) roasting
Ans: (b)
Q- Reduction of oxide with carbon at high temperature is called
(a) calcination
(b) smelting
(c) roasting
(d) None of the above
Ans: (b)
Q- Cement does not contain
(a) iron (b) aluminium
(c) calcium (d) sulphur
Ans: (d)
Q- Aluminium surface are often ‘anodised’. This means the deposition of a layer of
(a) chromium oxide
(b) aluminium oxide
(c) nickel oxide
(d) zinc oxide
Ans: (d)
Q- Flux reacts with the impurities to form fusible material which is known as
(a) gangue
(b) slag
(c) anode
(d) None of the above
Ans: (b)
Q- The element with electronic configuration 3d54s1 is
(a) Metalloid
(b) Non-metal
(c) Tansition metal
(d) Noble gas
Ans: (c)
Q- Variable valency is shown by
(a) typical elements
(b) normal elements
(c) transition elements
(d) None of the above
Ans: (c)
Q- Electrometallurgy is employed for the reduction of
(a) Cu (b) Fe
(c) Na (d) Ag
Ans: (c)
Q- Which of one of the following metals is extracted by thermal reduction process?
(a) Copper (b) Iron
(c) Aluminium (d) Magnesium
Ans: (a)
Q- Which of the following elements does not show variable oxidation states?
(a) Iron (b) Titanium
(c) Copper (d) Zinc
Ans: (d)
Q- If a non-metal is added to the interstitial sites of a metal, then the metal becomes
(a) Less tensile
(b) Less malleable
(c) Softer
(d) None of the above
Ans: (b)
Q- The least stable oxide at room temperature is
(a) CuO (b) Ag2O
(c) ZnO (d) Sb2O3
Ans: (b)
Q- Which of the following is a carbonate ore?
(a) Limonite (b) Carnallite
(c) Horn silver (d) Siderite
Ans: (d)
Q- Which of the following is largest?
(a) Cl-
(b) S2-
(c) Na+
(d) None of the above
Ans: (a)
Q- Important ore of Mg is
(a) Magnatide (b) Carnotite
(c) Gypsum (d) Carnallite
Ans: (d)
Q- Cassiterite is concentrated by
(a) hand picking
(b) levigation
(c) electromagnetic separation
(d) Wilfley table method
Ans: (a)
Q- The removal of gangue from the ore is collect
(a) concentration
(b) liquation
(c) hand picking
(d) leaching
Ans: (a)
Q- Calcination is the process of heating the ore?
(a) In a blast furnace
(b) In absence of air
(c) In presence of air
(d) None of the above
Ans: (a)
Q- The reason of floating of the ore particles in concentration by froth flotation process is their
(a) being light
(b) being insoluble
(c) being charged
(d) being hydrophobic
Ans: (d)
Q- In the extraction of zinc the formation of blue flame is due to the burning of
(a) C (b) CO
(c) Zn (d) ZnO
Ans: (b)
Q- Which of the following metal has the lowest value of ionisation energy?
(a) Mg (b) Ba
(c) Sr
(d) None of the above
Ans: (a)
Q- Iron ore is concentrated by
(a) froth flotation
(b) electrolysis
(c) roasting
(d) magnetic treatment
Ans: (d)
Q- The most abundant element on earth curst is
(a) hydrogen (b) oxygen
(c) silicon (d) carbon
Ans: (b)
Q- If steel is heated to a temperature well below red heat and is then cooled slowly, the process is called
(a) hardening (b) tempering
(c) annealing (d) softening
Ans: (c)
Q- Which one of the following pairs of materials serves as electrodes in chargeable batteries commonly used in devices such as torchlights, electric shavers etc.?
(a) Nickel and cadmium
(b) Zinc and carbon
(c) Lead peroxide and lead
(d) Iron and cadmium
Ans: (a)
Q- In blast furnace, maximum temperature is in
(a) Zone of reduction
(b) Zone of combusion
(c) Zone of fusion
(d) Zone of slag combustion
Ans: (b)
Q- In the extraction of silver Ag2S, is dissolved in
(a) HNO3 (b) H2SO4
(c) HCl (d) KCN
Ans: (d)
Q- Gold and silver are extracted from their respective ores by
(a) Smelting
(b) Roasting
(c) Leaching
(d) Hydro metallurgy
Ans: (d)
Q- Slag is a product of
(a) Coke and metal oxide
(b) Metal and flux
(c) Flux and impurities
(d) Flux and coke
Ans: (c)
Q- In the reverberatory furnace
(a) The flames do not come in contact with the charge
(b) The flames come in contact with the charge
(c) Only hog gases come in contact with the charge
(d) None of the above
Ans: (c)
Q- The metal which is generally used for the filaments of electric bulb is
(a) Pt (b) Fe
(c) W (d) Cu
Ans: (c)
Q- The main element of pitch blende ore is
(a) U (b) Ce
(c) Th (d) Mg
Ans: (a)
Q- Which one of the following is found in only body?
(a) Pb (b) Fe
(c) Cd (d) Al
Ans: (b)
Q- The metal always found in free state is
(a) Gold (b) Sodium
(c) Silver (d) Copper
Ans: (a)
Q- The most malleable of all metals is
(a) Ag (b) Au
(c) Na (d) Pt
Ans: (b)
Q- Wolframite ore is separated from tinstone ore by the process of
(a) smelting (b) calcination
(c) roasting (d) electromagnetic
Ans: (d)
Q- The most abundant metal in the earth’s crust is
(a) Magnesium (b) Aluminium
(c) Calcium (d) Iron
Ans: (b)
Q- Chalcopyrite is an ore of
(a) calcium (b) copper
(c) magnesium (d) gallium
Ans: (b)
Q- Which of the following is an ore of copper here?
(a) Malachite (b) Bauxite
(c) Dolomite (d) Cinnabar
Ans: (a)
Q- Which of the following methods is used to purify tin?
(a) Poling
(b) Electrolytic refining
(c) Liquation
(d) All of the above
Ans: (d)
Q- Which of the following is a fluoride mineral of aluminium?
(a) Felspar (b) Cryolite
(c) Mica (d) Porcels
Ans: (b)
Q- The lanthanide contraction is responsible for the fact that
(a) Zr and Y have about the same radius
(b) Zr and Zn have the same oxidation state
(c) Zr and Hf have about is same radius
(d) Zr and Nb have similar oxidation state
Ans: (c)
Q- Which of the following processes is not used for the purification of solid impurities?
(a) Sublimation
(b) Distillation
(c) Vaporisation
(d) Crystallisation
Ans: (b)
Q- Metal, which forms coloured chloride is
(a) Al (b) Cr
(c) Sn (d) Zn
Ans: (b)
Q- Which is most active metal among the following?
(a) Al (b) Cu
(c) Ni (d) Pb
Ans: (a)
Q- The ore present in India in abundance is
(a) Monazite (b) Magnetite
(c) Bauxite (d) Fluorspar
Ans: (b)
Q- Bell metal is an alloy of
(a) Cu + Pb (b) Cu + Zn
(c) Cu + Ni (d) Cu + Sn
Ans: (d)
Q- Match the following: List-I List-II
A. Zn 1. Amalagamation
B. Ag 2. Self-reduction
C. Fe 3. Carbon reduction
D. Ca 4. Carbon monoxide reduction
E. Cu 5. Fused salt electrolysis Codes A B C D E
(a) 3 1 4 5 2
(b) 2 4 3 1 5
(b) 5 1 2 4 3
(d) 5 3 4 2 1
Ans: (a)
Q- Pyrolusite is
(a) MnO (b) Mn2O3
(c) MnO2 (d) SnO2
Ans: (c)
Q- Pb and Sn are extracted from their chief ore by
(a) Carbon-reduction and selfreduction
(b) Self-reduction and carbon reduction
(c) Electrolysis and self-reduction
(d) Self-reduction and electrolysis
Ans: (b)
Q- The purification of alumina is done by
(a) Baeyer’s process
(b) Hoop’s process
(c) Bosch process
(d) Castner process
Ans: (a)
Q- An example of halide ores is
(a) Bauxite (b) Cinnabar
(c) Cryolite (d) Galena
Ans: (c)
Q- Which of the following are not concentrated by froth flotation method?
(a) Copper pyrite
(b) Pentlandite
(c) Pyrolusite
(d) Zinc blende
Ans: (b)
Q- Steel differs from pig iron and wrought iron that it contains
(a) less carbon
(b) more carbon
(c) amount of carbon intermediate between these two
(d) no carbon at all
Ans: (c)
Q- Alkali metals in each period have
(a) Lowest IE
(b) Highest IE
(c) High electro-negativity
(d) None of the above
Ans: (a)
Q- The colour of iodine solution is discharged by shaking it with aqueous solution of
(a) sodium sulphate
(b) sodium sulphite
(c) sodium thiosulphate
(d) sulphuric acid
Ans: (c)
Q- When sodium bicarbonate is heated, the product obtained is
(a) Na (b) NaCO3
(c) NaHCO3 (d) Na2CO3
Ans: (d)
Q- Which of the following potassium compounds is known as ‘Pearl ash’?
(a) K2SO4 (b) K2CO3
(c) KMnO4 (d) KOH
Ans: (b)
Q- Which one of the following does not participate in Solvey’s process for the manufacture of Na2CO3?
(a) CO2 (b) NH3
(c) H2SO4 (d) NaCl
Ans: (c)
Q- The aqueous solution containing which one of the following ions will be colourless?
(a) Sc3+ (b) Fe3+
(c) Fe2+ (d) Mn2+
Ans: (a)
Q- Which of the following is a carbonate ore?
(a) Cassiterite (b) Pyrolysite
(c) Diaspore (d) Malachite
Ans: (d)
Q- Match the following: List-I List-II
A. Al 1. Haematite
B. Ag 2. Cryolite
C. Sn 3. Cassiterite
D. Iron 4. Argentite Codes A B C D
(a) 2 4 3 1
(b) 3 2 1 4
(c) 4 2 1 3
(d) 2 3 4 1
Ans: (a)
Q- Which of the following is highly corrosive salt?
(a) FeCl2 (b) HgCl2
(c) PbCl2 (d) Hg2Cl2
Ans: (b)
Q- Malachite is a mineral of
(a) Mg (b) Cu
(c) Al (d) Fe
Ans: (b)
Q- Ni is purified by
(a) Mond process
(b) Zone refining process
(c) Van arkel process
(d) None of the above
Ans: (a)
Q- The elements of group I are known as alkali metals as
(a) Their oxides are alkaline
(b) Their hydrides are strongly alkaline
(c) The metals are corroded by alkali
(d) None of the above
Ans: (a)
Q- Calamine is an ore of
(a) Ag (b) Cu
(c) Fe (d) Zn
Ans: (d)
Q- The process of sudden cooling is known as
(a) annealing (b) diffusion
(c) quencing (d) sedimentation
Ans: (c)
Q- Which of the following cannot form peroxides and superoxides?
(a) Na (b) Li
(c) K (d) Rb
Ans: (b)
Q- The electronic configuration of Cu is
(a) 3d94s2 (b) 3d104s1
(c) 3d95s2 (d) 3d105s1
Ans: (b)
Q- An alloy is
(a) Intermetallic compound
(b) A solid substance containing two or more metallic elements
(c) A solid which contains one nonmetal
(d) A solid which contains more than one non-metal
Ans: (b)
Q- The paramagnetic character of the metals is due to
(a) Completely filled orbitals
(b) Unpaired electrons
(c) Variable valency
(d) Low melting and boiling point
Ans: (b)
Q- The metal used in incandescent lamps is
(a) Mo (b) Pt
(c) W (d) Cr
Ans: (c)
Q- MnO4 – on reduction in acid medium forms
(a) MnO2 (b) MnO4 –
(c) Mn (d) Mn++
Ans: (d)
Q- The best conductor of electricity is
(a) Ag (b) Au
(c) Al (d) Hg
Ans: (a)
Q- Which of the following alkaline earth metal is used in manufacture of aeroplane parts?
(a) Se (b) Ca
(c) Mg (d) Be
Ans: (c)
Q- The molecular formula of chromyl chloride is
(a) CrO2Cl2 (b) CrOCl2
(c) CrCl3 (d) CrCl5
Ans: (a)
Q- Calcium decomposes water and liberates
(a) H2 (b) O2
(c) CaO (d) CaO2
Ans: (a)
Q- Which of the following is formed when beryllium burns in oxygen?
(a) Be2O (b) BeO
(c) BeO2 (d) Be2O2
Ans: (b)
Q- Which of the following processes is used to remove reducible oxides from the metal?
(a) Liquation (b) Cupellation
(c) Poling (d) Electro refining
Ans: (c)
Q- The formula of azurite is
(a) CuCO3 .2Cu(OH)2
(b) 2CuCO3 .Cu(OH)2
(c) CuCO3 .Cu(OH)2
(d) CuSO4 .Cu(OH)2
Ans: (b)
Q- The main constituents of bronze are
(a) Cu and Sn (b) Cu and Ni
(c) Cu and Zn (d) Zn and Sn
Ans: (a)
Q- The essential metal of an amalgam is
(a) Any base (b) Any alkali metal
(c) Copper (d) Mercury
Ans: (d)
Q- Which of the following compounds is used as a yellow pigment in making oil and water colours?
(a) Cd2O (b) CdS
(c) Cd(OH)2 (d) CdO
Ans: (b)
Q- Which of the following is a true statements regarding calcination?
(a) The ore is heated strongly in the absence of any blast of air
(b) The ore is heated with calcium
(c) The ore is heated with carbon
(d) The mineral is melted with lime stone
Ans: (a)
Q- Barium in a suitable form is administered to patients before an X-ray examination of the stomach, because
(a) Barium allows X-rays to pass through the stomach on account of its transparency to X-rays
(b) Barium is a good absorber of g-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture
(c) Barium is a good absorber of X-rays and this helps the stomach to appear clearly in contrast with the other regions in the picture
(d) Barium salts are white in colour and this helps the stomach to appear clearly in contrast with other region in the pictures
Ans: (c)
Q- Which of the following is used in atomic reactors?
(a) Fe (b) Cd
(c) Ru (d) Al
Ans: (b)
Q- Iron obtained from blast furnace is known as
(a) Pig iron
(b) Hard iron
(c) Wrought iron
(d) Soft iron
Ans: (a)
Q- Which has maximum ferro-magnetic character?
(a) Fe (b) Co
(c) Ni (d) Pt
Ans: (a)
Q- Which of the following ion is diamagnetic here?
(a) Cu+ (b) Zn2+
(c) Sc3+ (d) All of these
Ans: (d)
Q- Non-ferromagnetic element is
(a) Fe (b) Co
(c) Mn (d) Ni
Ans: (c)
Q- The highest oxidation state shown by any transition element is
(a) +8 (b) +7
(c) +6 (d) +2
Ans: (a)
Q- Which of the following ion is colourless?
(a) Cu+ (b) Ni2+
(c) Fe2+ (d) Fe3+
Ans: (a)
Q- Which of the following metals is present in brass, bronze and german silver?
(a) Mg (b) Cu
(c) Al (d) Na
Ans: (b)
Q- An extremely hot copper wire reacts with steam to give
(a) Cu2O (b) CuO2
(c) Cu2O2 (d) CuO
Ans: (d)
Q- Which is soluble in water?
(a) AgF
(b) AgCl
(c) AgBr
(d) None of the above
Ans: (a)
Q- Which of the following gases is evolved when cupric sulphide (CuS) is dissolved in dilute hydrochloric acid (HCl)?
(a) S (b) Cl2
(c) H2S (d) H2
Ans: (c)
Q- The electrolysis of potassium maganate solution gives
(a) KMnO4 + KOH
(b) KOH + H2
(c) KOH + O2
(d) MnO2 + KOH
Ans: (a)
Q- The highest oxidation state is shown by
(a) Ti (b) Cr
(c) V (d) Sc
Ans: (b)
Q- The alkali metal which is a liquid at room temperature is
(a) Cs (b) Rb
(c) Na (d) Fr
Ans: (d)
Q- During the process of electrolytic refining of copper, some metals present as impurity settle as anode mud. These are
(a) Pb and Zn (b) Ag and Au
(c) Sn and Ag (d) Fe and Ni
Ans: (b)
Q- Which of the following alkaline earth metal shows properties similar to Al?
(a) Ca (b) Be
(c) Ba (d) Sr
Ans: (b)
Q- Which of the following configurations stands for an alkaline earth element?
(a) [Ar]4s2 (b) [Ar]3d104s1
(c) [Ne]3s23p2 (d) [Ar] 3d104p1
Ans: (a)
Q- Which of the following is corrosive sublimate?
(a) HgBr2 (b) HgCl2
(c) Hg2Cl2 (d) HgSO4
Ans: (b)
Q- Which of the following alkaline earth metals forms covalent compounds?
(a) Magnesium (b) Calcium
(c) Barium (d) Beryllium
Ans: (d)
Q- Mercury is transported in metal containers made of
(a) Lead
(b) Silver
(c) Aluminium
(d) Iron
Ans: (d)
Q- In Nessler’s reagent, the ion present is
(a) 2 HgI4−(b) 22 HgI −(c) Hg+ (d) Hg2+
Ans: (d)
Q- Which of the following is produced when concentrated cinnabar is roasted in the excess of air?
(a) Hg (b) Fe
(c) Zn (d) Al
Ans: (a)
Q- Mercuric iodide dissolves in excess of KI and forms
(a) Hg2I2
(b) Hg
(c) K2[HgI4]
(d) K[HgI2]
Ans: (c)
Q- Which of the following is used in making ointment for curing skin disease?
(a) ZnCO3 (b) ZnSO4
(c) ZnO (d) ZnS
Ans: (a)
Q- Match the List-I with List-II and select the correct answer using the codes given below the lists: List-I (Mineral) List-II (Industries in which largely used)
A. Limestone 1. Cement
B. Copper 2. Electrical goods
C. Bauxite 3. Manufacture of aeroplanes
D. Manganese 4. Steel Codes A B C D
(a) 1 2 3 4
(b) 2 3 1 4
(c) 4 3 2 1
(d) 3 4 1 2
Ans: (a)
Q- Which one of the following is known as salt peter?
(a) NaCl (b) KNO3
(c) Na2CO3 (d) NaHCO3
Ans: (b)
Q- Cadmium is almost found in the ore of
(a) Gold (b) Silver
(c) Aluminium (d) Zinc
Ans: (d)
Q- Calcium decomposes cold water into
(a) Ca(OH)2 (b) CaH2
(c) O2 (d) CaO
Ans: (a)
Q- Match the List-I (compound) with List-II (chemical name) and select the correct answer using the codes given below the lists: List-I (Compound) List-II (Chemical name)
A. Bleaching powder
1. Calcium oxychloride
B. Gypsom 2. Calcium sulphate
C. Marble 3. Calcium carbonate Codes A B C
(a) 1 2 3
(b) 2 3 1
(c) 1 3 2
(d) 2 1 3
Ans: (a)
Q- Which of the following metal ions plays an important role in the muscle contraction?
(a) Na+
(b) K+
(c) Mg2+
(d) Ca2+
Ans: (d)
Q- On heating CaO with C, we get
(a) Ca and CO
(b) CaCO3 and Ca
(c) CaC2 and CO
(d) CaC2 and CO2
Ans: (c)
Q- When metal is obtained in the molten state from its ore, the process may be called
(a) Rusting
(b) Smelting
(c) Calcination
(d) Thermal dissociation
Ans: (b)
Q- Consider the following statements:
1. Baking soda is used in fire extinguishers.
2. Quick lime is used in the manufacture of glass.
3. Gypsum is used in manufacture of plaster of Paris. Which of the statements given above is/are correct?
(a) 1 and 2
(b) 2 and 3
(c) Only 1
(d) 1, 2 and 3
Ans: (d)
Q- The solubility of AgBr in hypo is due to the formation of
(a) Ag2S2O3
(b) [Ag(S2O3)]-
(c) [Ag(S2O3)]3-
(d) Ag2SO3
Ans: (c)
Q- The formula of haematite is
(a) Fe3O4 (b) Fe2O3
(c) FeCO3 (d) FeS2
Ans: (d)
Q- Which of the following is an important source of gold?
(a) Malachite
(b) Siderite
(c) Alluvial gravel
(d) Azurite
Ans: (c)
Q- The percentage of gold in 21.6 carat of gold is
(a) 80%
(b) 90%
(c) 21.6%
(d) 43.2%
Ans: (b)
Q- Which of the following is not a property of the transition elements?
(a) Fixed valency
(b) Colour
(c) Paramagnetic
(d) None of the above
Ans: (a)
Q- The purple colour of [Ti(H2O)6]3+ ion is due to
(a) Transfer of an electron
(b) Intermolecular vibrations
(c) Presence of water molecules
(d) Unpaired-electron
Ans: (d)
Q- Beryl is an important mineral of
(a) Lithium (b) Magnesium
(c) Beryllium (d) Calcium
Ans: (c)
Q- Silver is present in
(a) Limonite
(b) Pyrargyrite
(c) Magnetite
(d) Dolomite
Ans: (b)
Q- How many electrons are involved in the oxidation by KMnO4 in basic medium?
(a) 5 (b) 3
(c) 2 (d) 4
Ans: (d)
Q- Iron loses magnetic property at
(a) Melting point
(b) Curie point
(c) 1000 K
(d) Boiling point
Ans: (c)
Q- Zone refining is a method to obtain
(a) High temperature
(b) Ultra pure oxides
(c) Ultra pure metals
(d) All of the above
Ans: (c)
Q- Asbestos is a silicate mineral of calcium and
(a) K (b) Al
(c) Ba (d) Mg
Ans: (d)
Q- Which alloy can have iron also?
(a) Monel metal
(b) Constantan
(c) Aluminium bronze
(d) Brass
Ans: (c)
Q- Spathic ore is
(a) Fe2O3 .3H2O (b) FeCO3
(c) Fe2O4 (d) Fe2O3
Ans: (b)
Q- Which of the following metals do not form amalgam?
(a) Zinc (b) Copper
(c) Magnesium (d) Iron
Ans: (d)
Q- Match the List-I with List-II and select the correct answer using the codes given below the lists: List-I List-II
A. Blue vitriol 1.Sodium bicarbonate
B. Epsom salt 2.Sodium hydroxide
C. Baking soda 3.Magnesium sulphate
D. Caustic soda 4.Copper sulphate Codes A B C D
(a) 3 4 2 1
(b) 4 3 2 1
(c) 3 4 1 2
(d) 4 3 1 2
Ans: (d)
Q- Which of the following transition elements is synthetic?
(a) Pm (b) Mo
(c) Te (d) Re
Ans: (c)
Q- Which of the following does not belong to 3d series of transition elements?
(a) Palladium (b) Iron
(c) Vanadium (d) Titanium
Ans: (a)
Q- Which of the following compounds is known as white vitriol?
(a) ZnSO4 .7H2O
(b) Na2SO4 .7H2O
(c) CaC2O4 .2H2O
(d) MgSO4 .7H2O
Ans: (a)
Q- Consider the following statements : Coke is one of the materials of the charge added to blast furnace for the production of steel/iron. Its function is to
1. act as the reducing agent.
2. remove silica associated with the iron ore.
3. function as fuel, to supply heat.
4. act as an oxidizing agent. Of these statements
(a) 1 and 2 are correct
(b) 2 and 4 are correct
(c) 1 and 3 are correct
(d) 3 and 4 are correct
Ans: (c)
Q- Which of the following is obtained, when H2S is passed through the solution of sodium zincate?
(a) Zn(OH)2
(b) ZnS
(c) Na2[Zn(OH)4]
(d) Zn(NO3)2
Ans: (b)
Q- Anhydrous zinc chloride is prepared by heating
(a) ZNCl2 .2H2O
(b) Zn + HgCl2
(c) Zn + Cl2
(d) Both (b) and (c)
Ans: (d)
Q- The electronic configuration of C4 2+ is
(a) [Ar]3d9 (b) [Ar]3d64s24p1
(c) [Ar]3d84s1 (d) [Ar]3d74s2
Ans: (a)
Q- Assertion (A) : Sodium metal is stored under kerosene. Reason (R) : Metallic sodium melts when exposed to air. Codes
(a) Both (A) and (R) is true and (R) is the correct explanation of (A)
(b) Both (A) and (R) is true, but (R) is not a correct explanation of (A)
(c) (A) is true, but (R) is false
(d) (A) is false, but (R) is true
Ans: (c)
Q- Lithium reacts with nitrogen to form
(a) LiN (b) Li2N
(c) Li3N (d) Li4N
Ans: (c)
Q- Which of the following is most malleable?
(a) Cu
(b) Ag
(c) Au
(d) None is malleable
Ans: (c)
Q- Which of the following compounds of zinc is white when cold and yellow when hot?
(a) ZnS (b) ZnCl2
(c) ZnSO4 (d) ZnO
Ans: (d)
Q- Dead burnt is
(a) Anhydrous Na2SO4
(b) Na2CO3 which is useful for softening
(c) CaSO4 which is not useful for setting
(d) Anhydrous CuSO4
Ans: (c)
Q- Merscuric sulphide dissolves in aquaregia to form
(a) Hg2Cl2 (b) HgCl2
(c) Hg(NO3)Cl (d) Hg2(NO3)2
Ans: (b)
Q- A metal gives two chlorides A and
B. A give black ppt. with NH3 and B gives white. With KI, B gives a yellow ppt, which is soluble in excess of KI. A and B are respectively
(a) Hg2Cl2, HgCl2
(b) HgCl, Hg2Cl2
(c) ZnCl2, HgCl2
(d) HgCl2, ZnCl2
Ans: (a)
Q- Salts of which of the following elements provide colours to fireworks?
(a) Zinc and sulphur
(b) Potassium and mercury
(c) Strontium and barium
(d) Chromium and nickel
Ans: (c)
Q- Consider the following statements : The purpose of adding sodium sulphate and sodium silicate to the detergent in a washing powder is
1. to keep the washing powder dry.
2. to maintain the alkalinity of the powder. Which of these statements is/are correct?
(a) Only 1
(b) Only 2
(c) Both 1 and 2
(d) Neither 1 nor 2
Ans: (c)
Q- Steel contains
(a) Fe + Mn
(b) Fe + Cr + Mn
(c) Fe + Mn + C
(d) Fe + C + Al
Ans: (c)
Q- Oxidation state of iron in haemoglobin is
(a) +2 (b) +3
(c) 0 (d) –2
Ans: (a)
Q- Californium is the member of
(a) Actinides
(b) Lanthanides
(c) Alkali metals
(d) Alkalines earth metals
Ans: (a)
Q- The number of unpaired electrons in Fe+2, Fe+3, Ni+2 are respectively
(a) 4, 5, 5 (b) 4, 5, 2
(c) 5, 2, 4 (d) 5, 4, 2
Ans: (b)
Q- Which of the following alkaline earth metals has the highest ionic mobility in an aqueous solution?
(a) Ba2+ (b) Mg2+
(c) Ca2+ (d) Be2+
Ans: (a)
Q- The compounds of alkaline earth metals possess which of the following magnetic nature?
(a) Paramagnetic
(b) Diamagnetic
(c) Ferromagnetic
(d) Antiferromagnetic
Ans: (b)
Q- Stainless steel contains
(a) Fe + Cr + Ni
(b) Fe + Ni + Cu
(c) Fe + Cr + Cu
(d) Fe + C + Ni
Ans: (a)
Q- Iron rusts in the presence of
(a) O2 and N2
(b) O2 and moisture
(c) Moisture only
(d) O2 only
Ans: (b)
Q- The most common and stable oxidation state of lanthanides is
(a) +1 (b) +2
(c) +3 (d) +4
Ans: (c)
Q- Both lanthanides and actinides have their last valance electron in
(a) (n – 1)d (b) (n – 2)f
(c) ns (d) np
Ans: (b)
Q- Which of the following group elements easily form complexes?
(a) s-block
(b) p-block
(c) d-block
(d) All of the above
Ans: (c)
Q- The highest oxidation state shown by Mn is
(a) +2 (b) +3
(c) +6 (d) +7
Ans: (d)
Q- The colour given by calcium to the flame is
(a) green (b) crimson red
(c) brick red (d) violet
Ans: (c)
Q- Nitrolim is a mixture of
(a) CaCN2 and N2
(b) CaCN2 and graphite
(c) CaC2 and graphite
(d) Ca(CN)2 and graphite
Ans: (b)
Q- Silicon is the main constituent of
(a) Rocks (b) Alloys
(c) Animals (d) Plants
Ans: (a)
Q- The element which is not a liquid at room temperature (30°C) is
(a) Hg (b) Ga
(c) Br (d) Ge
Ans: (d)
Q- Which of the following acts as an antidote to HgCl2 poisoning?
(a) Yellow of egg
(b) Egg of fish
(c) White of egg
(d) Egg
Ans: (c)
Q- In Goldschmidt aluminothermic process, reducing agent is
(a) Coke (b) Na
(c) Al powder (d) Cu
Ans: (c)
Q- Mohr’s salt on oxidation with conc. HNO3 gives
(a) Ferric alum
(b) Potash alum
(c) Chrome alum
(d) All of the above
Ans: (a)
Q- Misch metal is widely used in the manufacture of which of the following?
(a) Material of car brake
(b) Smoke detectors
(c) Cigaratte lighters
(d) Emergency light
Ans: (c)
Q- Strontium burns in oxygen to form
(a) Sr2O (b) Sr2O2
(c) SrO (d) SrO2
Ans: (d)
Q- The nature of aqueous solution of FeCl3 is
(a) Neutral
(b) Basic
(c) Amphoteric
(d) Acidic
Ans: (d)
Q- Consider the following elements:
1. Cobalt
2. Phosphorous
3. Zinc Which of the above elements are required for the maintaining healthy human body?
(a) 1 and 2
(b) 2 and 3
(c) 1 and 3
(d) 1, 2 and 3
Ans: (d)
Q- The mixture of MgCl2 and MgO is called
(a) Pseudo alum
(b) Sorel’s cement
(c) Portland cement
(d) Alum
Ans: (b)
Q- Which of the following alloys contains Cu and Zn?
(a) Bell metal
(b) Aluminium bronze
(c) Brass
(d) Bronze
Ans: (c)
Q- The percentage of silver in german silver, is
(a) 0%
(b) 10%
(c) 2.5%
(d) 4.5%
Ans: (a)
Q- The outer electronic configuration of copper is
(a) 3d94s2 (b) 3d104s1
(c) 3d104s0 (d) 3d104s2
Ans: (b)
Q- Bell metal is an alloy of
(a) Cu + Sn (b) Cu + Zn
(c) Cu + Ni (d) Cu + Pb
Ans: (a)
Q- The general electronic configuration of transition metal is
(a) (n – 1)p1 – 6 ns2
(b) (n – 1)d1 – 10 ns1
(c) (n – 1)d1 – 10 ns1-2
(d) (n – 1)d1 – 10 ns0
Ans: (c)
Q- The second series of transition elements starts with
(a) scandium (b) ytterbium
(c) rhodium (d) yttrium
Ans: (d)
Q- Which of the following is formed when cadmium reacts with H2S?
(a) CdS (b) CdS2
(c) CdH (d) Cd2S
Ans: (a)
Q- Which of the following is obtained when cadmium chloride is treated with water?
(a) CdCl (b) Cd(OH)2
(c) CdO (d) Cd2O
Ans: (b)
Q- The 3d transition series contains elements from atomic number.
(a) 21 to 30 (b) 21 to 29
(c) 21 to 31 (d) 22 to 30
Ans: (a)
Q- The matallic nature of transition elements is …… than that of alkali metals.
(a) more
(b) same
(c) less
(d) None of the above
Ans: (c)
Q- Which lanthanides are used in glass, blowers, goggles?
(a) Eu, Gd (b) Pr, Nd
(c) Np, Pu (d) Am, Cm
Ans: (b)
Q- Match the List-I with List-II and select the correct answer using the codes given below the lists: List-I List-II
A. German silver 1. Tin
B. Solder 2. Nickel
C. Bleaching powder 3. Sodium
D. Hypo 4. Chlorine Codes A B C D
(a) 1 2 4 3
(b) 2 1 3 4
(c) 1 2 3 4
(d) 2 1 4 3
Ans: (d)
Q- Match the List-I with List-II and select the correct answer using the codes given below the lists: List-I List-II
A. Potassium bromide 1. Fertilizer
B. Potassium nitrate 2. Photography
C. Potassium sulphate 3. Bakery
D. Monopotassium tartarate
4. Gunpowder Codes A B C D
(a) 2 4 1 3
(b) 2 4 3 1
(c) 4 2 3 1
(d) 4 2 1 3
Ans: (a)
Q- Lanthanides contraction is related with
(a) atomic radii only
(b) ionic radii only
(c) both atomic and ionic radii
(d) oxidation only
Ans: (c)
Q- Which of the following is obtained when auric chloride reacts with sodium chloride?
(a) Na[AuCl4] (b) Na[AuCl3]
(c) Na[AuCl2] (d) Na[AuCl]
Ans: (a)
Q- Gold dissolves in aqua-regia to produce
(a) AuCl4
(b) HAuCl4
(c) HAuCl3
(d) [Au(CN)2]
Ans: (b)
Q- Formula of tear gas is
(a) N2O
(b) COCl2
(c) Cl3NO3
(d) None of the above
Ans: (c)