Chemistry · NDA previous year questions

2017 35 questions

1. Q782017 · 23 Apr 2017

   The amount of heat required to change a liquid to gaseous state without any change in temperature is known as

   1. A.specific heat capacity
   2. B.mechanical equivalent of heat
   3. C.latent heat of vaporization
   4. D.quenching
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   Answer: C

2. Q802017 · 23 Apr 2017

   Which one of the following elements forms highest number of compounds ?

   1. A.Oxygen
   2. B.Hydrogen
   3. C.Chlorine
   4. D.Carbon
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   Answer: D

3. Q812017 · 23 Apr 2017

   Which one of the following elements corrodes rapidly ?

   1. A.Aluminium
   2. B.Iron
   3. C.Zinc
   4. D.Silver
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   Answer: B

4. Q822017 · 23 Apr 2017

   20 g of common salt is dissolved in 180 g of water. What is the mass percentage of the salt in the solution ?

   1. A.5%
   2. B.9%
   3. C.10%
   4. D.15%
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   Answer: C

5. Q832017 · 23 Apr 2017

   The valency of an element depends upon the

   1. A.total number of protons in an atom
   2. B.mass number of an atom
   3. C.total number of neutrons in an atom
   4. D.total number of electrons in the outer most shell of an atom
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   Answer: D

6. Q842017 · 23 Apr 2017

   Match List I with List II and select the correct answer using the code given below the Lists : | List I (Noble gas) | List II (Use) | | :--- | :--- | | A. Argon | 1. In lights for advertising display | | B. Neon | 2. Airport landing lights and in light houses | | C. Krypton | 3. Light in photographer's flash gun | | D. Xenon | 4. In tungsten filament to last longer | Code : A B C D

   1. A.3 1 2 4
   2. B.3 2 1 4
   3. C.4 2 1 3
   4. D.4 1 2 3
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   Answer: D

7. Q862017 · 23 Apr 2017

   Radon is

   1. A.an inert gas
   2. B.an artificial fibre
   3. C.an explosive
   4. D.a metal
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   Answer: A

8. Q872017 · 23 Apr 2017

   Which one of the following elements is used in pencil-lead?

   1. A.Zinc
   2. B.Lead
   3. C.Carbon (Graphite)
   4. D.Tin
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   Answer: C

9. Q972017 · 23 Apr 2017

   Stung by hairs of nettle leaves causes burning pain. This is due to the injection of

   1. A.Acetic acid
   2. B.Methanoic acid
   3. C.Sulphuric acid
   4. D.Hydrochloric acid
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   Answer: B

10. Q992017 · 23 Apr 2017

    The chemical name of baking soda is

    1. A.$\mathrm{N}{\mathrm{a}}_2\mathrm{C}{\mathrm{O}}_3$
    2. B.$\mathrm{NaHC}{\mathrm{O}}_3$
    3. C.$\mathrm{CaC}{\mathrm{O}}_3$
    4. D.$\mathrm{NaOH}$
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    Answer: B