Chemistry · NDA previous year questions

2009 30 questions

1. Q672009 · 19 Apr 2009

   Which one of the following chemicals is used in Beauty Parlours for hair-setting ?

   1. A.Sulphur based
   2. B.Phosphorus based
   3. C.Silicon based
   4. D.Iron based
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   Answer: A

2. Q712009 · 19 Apr 2009

   Which among the following thermometers is preferred for measuring temperature around $1250^{\circ }\mathrm{C}$ ?

   1. A.Mercury thermometer
   2. B.Constant volume gas thermometer
   3. C.Optical pyrometer
   4. D.Platinum resistance thermometer
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   Answer: C

3. Q782009 · 19 Apr 2009

   Propagation of light quanta may be described by

   1. A.Photons
   2. B.Protons
   3. C.Neutrons
   4. D.Electrons
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   Answer: A

4. Q842009 · 19 Apr 2009

   Consider the following four particles : 1. Alpha particle 2. Proton 3. Electron 4. Neutron Which of the following is the correct sequence in which their rest-masses increase ?

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

5. Q1032009 · 19 Apr 2009

   Directions : Each of the following items consists of two statements, one labelled as the 'Assertion (A)' and the other as 'Reason (R)'. Examine the two statements carefully and select the answer using the codes given below. Assertion (A) : Carbon can form more compounds than any other element. Reason (R) : Carbon can exist in various allotropes.

   1. A.Both A and R are individually true and R is the correct explanation of A
   2. B.Both A and R are individually true but R is not the correct explanation of A
   3. C.A is true but R is false
   4. D.A is false but R is true
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   Answer: B