Chemistry · NDA previous year questions

2024 31 questions

1. Q822024 · 21 Apr 2024

   Which one among the following is present in the nettle leaf hairs that causes burning pain?

   1. A.Methanoic acid
   2. B.Ethanol acid
   3. C.Benzoic acid
   4. D.Acetic acid
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   Answer: A

2. Q832024 · 21 Apr 2024

   Which one among the following is known as Milk of Magnesia?

   1. A.Magnesium bicarbonate
   2. B.Magnesium carbonate
   3. C.Magnesium sulphate
   4. D.Magnesium hydroxide
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   Answer: D

3. Q862024 · 21 Apr 2024

   Which one among the following oxides has the highest melting point?

   1. A.$\mathrm{N}{\mathrm{a}}_2\mathrm{O}$
   2. B.$\mathrm{MgO}$
   3. C.$\mathrm{F}{\mathrm{e}}_2{\mathrm{O}}_3$
   4. D.$\mathrm{CuO}$
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   Answer: B

4. Q922024 · 21 Apr 2024

   Of the following, which does not belong to a nuclear reactor?

   1. A.A turbine
   2. B.A heat exchanger
   3. C.A mechanism to reduce $\mathrm{C}{\mathrm{O}}_2$ emission
   4. D.A reaction chamber
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   Answer: C

5. Q972024 · 21 Apr 2024

   Which one of the following scientists mentioned that an electron in an atom could revolve in certain stable orbits without the emission of radiant energy?

   1. A.Ernest Rutherford
   2. B.J.J. Thomson
   3. C.Niels Bohr
   4. D.Albert Einstein
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   Answer: C

6. Q1002024 · 21 Apr 2024

   Which one of the following is primarily responsible for conduction of current in a metal?

   1. A.Bound electrons
   2. B.Free electrons
   3. C.Both bound and free electrons
   4. D.Ions
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   Answer: B