Chemistry · NDA previous year questions

2018 30 questions

1. Q842018 · 22 Apr 2018

   Which one of the following is the purest form of Carbon?

   1. A.Charcoal
   2. B.Coke
   3. C.Fullerene
   4. D.Carbon black
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   Answer: C

2. Q852018 · 22 Apr 2018

   The Poisonous nature of Carbon monoxide (CO) is due to its

   1. A.insolubility in water
   2. B.ability to form a complex with haemoglobin
   3. C.ability to reduce some metal oxides
   4. D.property of having one sigma bond
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   Answer: B

3. Q862018 · 22 Apr 2018

   Which one of the following alkali metals has lowest melting point?

   1. A.Sodium
   2. B.Potassium
   3. C.Rubidium
   4. D.Caesium
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   Answer: D

4. Q872018 · 22 Apr 2018

   Which one of the following metals is alloyed with sodium to transfer heat in a nuclear reactor?

   1. A.Potassium
   2. B.Calcium
   3. C.Magnesium
   4. D.Strontium
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   Answer: A

5. Q992018 · 22 Apr 2018

   The accidental touch of Nettle leaves creates a burning sensation, which is due to inject of

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