Q- ‘‘Which elements are arranged in increasing order of atomic weight, every eighth element has properties similar to the first.’’ This law had been given by
(a) Moseley
(b) Dobereiner
(c) Newland
(d) Lother-Mayer
Ans: (c)
Q- During the evaporation of a liquid
(a) the enthalpy decreases
(b) the enthalpy increases
(c) the enthalpy remains unchanged
(d) the internal energy decreases
Ans: (b)
Q- Which among the following has the highest ionisation potential?
(a) Li (b) B
(c) Ne (d) F
Ans: (c)
Q- The element that has the highest first ionisation potential is
(a) Boron (b) Nitrogen
(c) Oxygen (d) Carbon
Ans: (b)
Q- Which of the following among alkali metals is most reactive?
(a) Na (b) K
(c) Rb (d) Cs
Ans: (d)
Q- Which of the following ions will from most water soluble hydroxide?
(a) K+ (b) Ni++
(c) Zn++ (d) Al++
Ans: (a)
Q- Which of the following is not a liquid element?
(a) Br (b) Ga
(c) Fr (d) Ca
Ans: (d)
Q- The element having lowest melting point in periodic table is
(a) Hg (b) He
(c) W (d) Cs
Ans: (b)
Q- In the following four elements, the ionisation potential of which one is the highest?
(a) Argon (b) Barium
(c) Cesium (d) Oxygen
Ans: (a)
Q- Which of the following properties occurs in alkali metals?
(a) Highest ionisation energy
(b) Largest atomic radii
(c) Highest density
(d) None of the above
Ans: (b)
Q- The properties of elements of Mendeleev’s periodic law were the periodic functions of their
(a) Atomic number
(b) Atomic weight
(c) Mass of the atom
(d) Shape of the atom
Ans: (b)
Q- Metal with maximum density here is
(a) Fe (b) Mo
(c) Hg (d) Os
Ans: (d)
Q- The long form of periodic table is based on
(a) Electronegativity
(b) Mass of the atom
(c) Shape of the atom
(d) Atomic number
Ans: (d)
Q- The long form of periodic table was developed by
(a) Bohr
(b) Mendeleev
(c) Range and Werner
(d) Rutherford
Ans: (c)
Q- Transition metal belong to
(a) s-block (b) p-block
(c) d-block (d) f-block
Ans: (c)
Q- Which substance is the most metallic?
(a) Bi
(b) As
(c) Sb
(d) None of the above
Ans: (a)
Q- The highest metal is
(a) Li (b) Mg
(c) Ca (d) Na
Ans: (a)
Q- The elements on the right side of the periodic table are
(a) Metals
(b) Metalloids
(c) Non-metals
(d) Transition elements
Ans: (c)
Q- Which of the following transition metal is in liquid state ?
(a) Chromium (b) Cadmium
(c) Mercury (d) Vanadium
Ans: (c)
Q- The first element of rare earth metal is
(a) Cerium (b) Actinium
(c) Uranium (d) Lanthanum
Ans: (a)
Q- Which one of the following electronic configurations exhibits metallic character?
(a) 2, 7 (b) 2, 8, 2
(c) 2, 8, 4 (d) 2, 8, 8
Ans: (b)
Q- Which of the following has the highest ionisation potential?
(a) N (b) C
(c) O (d) F
Ans: (d)
Q- Consider the following statements with reference to the periodic table of chemical element
1. Ionisation potential gradually decreases along a period
2. In a group of element, electron affinity decreases as the atomic weight increases
3. In a given period, electronegativity decrease as the atomic number increases Which of these statement(s) is/are correct?
(a) Only 1 (b) Only 2
(c) 1 and 3 (d) 2 and 3
Ans: (b)
Q- The screening effect of inner electrons of the nucleus causes
(a) Decrease in the ionisation energy
(b) Increase in the ionisation energy
(c) No effect on the ionisaiton energy
(d) Increase in the attraction of the nucleus to the electrons
Ans: (c)
Q- The calculation of electronegativities was first done by
(a) Slater (b) Pauling
(c) Bohr (d) Mulliken
Ans: (b)
Q- Which of the following element has the lowest electron affinity?
(a) Selenium (b) Arsenic
(c) Iodine (d) Argon
Ans: (d)
Q- The elements in group zero are called
(a) Alkali metals
(b) Transition metals
(c) Inert gases
(d) None of the above
Ans: (c)
Q- Alkali metal are in a group
(a) IIA (b) VII A
(c) I A (d) III A
Ans: (c)
Q- Aluminium is diagonally related to
(a) Li (b) Be
(c) C (d) B
Ans: (b)
Q- The first attempt to classify elements was made by
(a) Mendeleev
(b) Newland
(c) Lother-Mayer
(d) Dobereiner
Ans: (a)
Q- Elements of d-block are called
(a) Transition elements
(b) Transuranic elements
(c) Metals
(d) Metalloids
Ans: (a)
Q- Halogens belong to the
(a) s-block (b) p-block
(c) d-block (d) f-block
Ans: (b)
Q- The total number of lanthanide elements is
(a) 8 (b) 32
(c) 14 (d) 10
Ans: (c)
Q- The ligthest metal is
(a) Li (b) Fe
(c) Cu (d) Ag
Ans: (a)
Q- Diagonal relationship is shown by
(a) Elements of 1st period
(b) Elements of 2nd period
(c) Elements of 3rd period
(d) None of the above
Ans: (b)
Q- The general electronic configuration of elements of p-block is represented by
(a) ns1 to ns2
(b) ns2 to np6
(c) ns2 ns1 to ns2 np5
(d) (n – 1)d1-0 ns0 – 2
Ans: (c)
Q- In modern periodic table, the group member is
(a) 15 (b) 16
(c) 17 (d) 18
Ans: (d)
Q- In modern periodic table, the number of period is
(a) 2 (b) 6
(c) 7 (d) 8
Ans: (c)
Q- Which element of the following does not exist in liquid state at room temperature?
(a) Na (b) Br
(c) Hg (d) Ga
Ans: (a)
Q- An example of a non-stoichiometric compound is
(a) PbO (b) NiO2
(c) Al2O3 (d) Fe3O4
Ans: (d)
Q- Which of the following has zero electron affinity?
(a) Nitrogen (b) Oxygen
(c) Fluorine (d) Neon
Ans: (d)
Q- Inert gases (Except Helium) comes in which block in the periodic table?
(a) s-block
(b) d-block
(c) p-block
(d) None of the above
Ans: (c)
Q- The most electropositive amongst the alkaline earth metals is
(a) Beryllium
(b) Magnesium
(c) Barium
(d) Calcium
Ans: (c)
Q- Which has the highest electron affinity?
(a) F (b) Cl
(c) Br (d) I
Ans: (b)
Q- Which block of elements are mostly metals with high boiling point, melting point values?
(a) s-block (b) d-block
(c) p-block (d) Cannot be said
Ans: (b)
Q- Which of the following pairs do not have diagonal relationship?
(a) Be, Al (b) Li, Mg
(c) B, Si (d) Na, Mg
Ans: (d)
Q- The horizontal line in modern periodic table is called
(a) Period
(b) Group
(c) Metal
(d) None of the above
Ans: (a)
Q- The vertical lines in modern periodic table are called
(a) Period (b) Group
(c) Non-metal
(d) None of the above
Ans: (b)
Q- Which of the following has the smallest size?
(a) Mg2+ (b) Na+
(c) F (d) Al3+
Ans: (d)
Q- In a period, the elements are arranged in the order of
(a) constant charges in the nucleus
(b) equal charges in the nucleus
(c) decreasing charges in the nucleus
(d) increasing charges in the nucleus
Ans: (d)
Q- Modern periodic table is based on atomic number of the elements. The significance of atomic number was proved by the experiment of
(a) Moseley’s work on X-ray spectra
(b) Bragg’s work on X-ray diffraction
(c) Mulliken’s oil drop experiment
(d) Discovery of X-ray by Roentgen
Ans: (a)
Q- Which noble gas does not have octet of electrons in its outer shell?
(a) He
(b) Rn
(c) Ar
(d) None of the above
Ans: (a)
Q- All the elements in a group in the periodic table have the same
(a) Atomic weight
(b) Same number of valence electrons
(c) Atomic number
(d) None of the above
Ans: (b)
Q- Transition metals are often paramagnetic owing to
(a) High melting point and boiling point
(b) The presence of vacant orbitals
(c) The presence of unpaired electrons
(d) Malleability and ductility
Ans: (c)
Q- Aluminium bears a diagonal relationship with
(a) Beryllium (b) Boron
(c) Carbon (d) Gallium
Ans: (a)
Q- Which of the following pairs of atomic numbers, represent the elements belonging to the same group?
(a) 15 and 13 (b) 12 and 21
(c) 14 and 31 (d) 13 and 31
Ans: (d)
Q- Which one of the following sequence of the chemical elements is correct in terms of the descending order of atomic radius?
(a) B – C – N – O
(b) C – B – O – N
(c) N – O – B – C
(d) O – N – C – B
Ans: (a)
Q- The long form of periodic table consists of
(a) 8 Horizontal and 7 vertical series
(b) 7 Horizontal and 18 vertical series
(c) 7 Horizontal and 7 vertical series
(d) 8 Horizontal and 8 vertical series
Ans: (b)
Q- The most common lanthanide is
(a) Lanthanum (b) Cerium
(c) Plutonium (d) Samarium
Ans: (b)
Q- The elements with atomic numbers 2, 10, 18, 36, 54 and 86 are all
(a) Inert gas
(b) Light metals
(c) Halogens
(d) Rare earth metals
Ans: (a)
Q- Which is chemically most active non-metal?
(a) F2 (b) He
(c) N2 (d) O2
Ans: (a)
Q- Which of the following pairs of elements is in the same period of the periodic table?
(a) Na, Ca (b) Na, Cl
(c) Ca, Cl (d) Mg, Sb
Ans: (b)
Q- Which of the following is the smallest cation?
(a) Na+ (b) Mg2+
(c) Li+ (d) Be++
Ans: (d)
Q- Which one of the following has largest size?
(a) C4- (b) N3-
(c) O2- (d) F-
Ans: (a)
Q- Which one is known as father of periodic table?
(a) Lavoisier (b) Rutherford
(c) Mendeleev (d) Bohr
Ans: (c)
Q- Modern periodic law has been given by
(a) Moseley (b) Mendeleev
(c) Lother-Mayer
(d) Lavoisier
Ans: (a)
Q- Electron affinity of noble gases is
(a) Almost zero
(b) Low
(c) High (d) Very high
Ans: (a)
Q- The electron affinity of chlorine is highest than that of fluorine due to
(a) its highest reactivity
(b) bigger size
(c) difference in their electronic configuration
(d) smaller nuclear charge
Ans: (b)
Q- In the reaction Zn + H2SO4 —→ ZnSO4 + H2, Zn undergoes
(a) oxidation
(b) reduction
(c) simple dissolution
(d) double decomposition
Ans: (c)
Q- Assertion (A) : In the periodic table of chemical element, electron affinity is always found to increase from top to bottom in a group. Reason (R) : In a group, the atomic radii generally increase from top to bottom. Codes
(a) Both (A) and (R) are individually true and (R) is the correct explanation of (A)
(b) Both (A) and (R) are individually true, but (R) is not the correct explanation of (A)
(c) (A) is true, but (R) is false
(d) (A) is false, but (R) is true
Ans: (d)
Q- Which has maximum conductivity?
(a) Cu (b) Na
(c) Mg (d) Fe
Ans: (a)
Q- Oxidation state of oxygen in hydrogen peroxide is
(a) –1 (b) +1
(c) zero (d) –2
Ans: (a)
Q- Which of the following isoelectronic species has the largest size?
(a) N3- (b) Mg2+
(c) F- (d) Na+
Ans: (a)
Q- First of all the elements were classified by
(a) Lother Meyer
(b) Newland
(c) Mendeleev
(d) Dobereiner
Ans: (b)