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NDA General Science Last Year Questions


Q1.
The lines of force of uniform magnetic field
(a) must be convergent
(b) must be divergent
(c) must be parallel to each other
(d) intersect

Q2. For which among the following house appliances, magnet is an essential part?
(a) Calling bell
(b) Fan
(c) Washing machine
(d) All of the above

Q3. This question consist of two statements, one labelled as the Assertion (A) and the other as ‘Reason (R), You are to examine these two statements carefully and select the answers to these items using the codes given below:
Assertion(A): If the filament of a light bulb is not uniform horizontal its life is shortened.
Reason(R): Resistance of glowing light bulb is less than that of bulb at room temperature.
(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

Q4. Which one of the following is a good conductor of electricity?
(a) Shellac
(b) Human body
(c) Glass
(d) Ebonite

Q5. Radioactive decay provides an internal source of heat for the earth. This helps in the formation of which type of rocks?
(a) Igneous
(b) Sedimentary
(c) Metamorphic
(d) All of the above

Q6. At 30°C, which 3 metals are all liquids?
(a) Hg, Fe, Zn
(b) Hg, Sn,Pb
(c) Zn, Pb, Sn
(d) Hg,Ga, Cs

Q7. The molecular weight and equivalent weight of which one of the following is the same?
(a) H2SO4
(b) KMnO4
(c) H2C2O4
(d) NaOH

Q8. The number of neutrons in 7Al27 is
(a) 40
(b) 27
(c) 14
(d) 13

Q9. Match List I with List II and select the correct answer using the code given below the Lists:
 (Scientist) (Discovery)
1. Atomic theory A. Goldstein
2. Proton B. Chadwick
3. Neutron C. JJ Thomson
4. Electron D. John Dalton
Code: A B C D
(a) 2 3 4 1
(b) 2 4 3 1
(c) 1 4 3 2
(d) 1 3 4 2

Q10. The major combustible component of gobar (cow-dung) gas is
(a) methane
(b) carbon dioxide
(c) hydrogen
(d) propane

Q11. Assertion (A): Diamond is a good conductor of electricity.
Reason (R): Diamond and graphite are two allotrope of carbon and graphite is a good conductor of electricity.
(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

Q12. Which among the following is an element?
(a) Alumina
(b) Brass
(c) Graphite
(d) Silica

1. (c)2. (d)3. (c)4. (b)5. (a)6. (d)7. (d)8. (c)9. (a)10. (b)11. (a)12. (a)

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