General Science · NDA previous year questions

2015 3 questions

1. Q722015 · 27 Sept 2015

   Which one of the following is the SI unit of the thermal conductivity of a material?

   1. A.$\mathrm{W}{\mathrm{m}}^{-1}{\mathrm{K}}^{-1}$
   2. B.$Wm/K$
   3. C.$\mathrm{W}{\mathrm{m}}^{-1}/{\mathrm{K}}^{-1}$
   4. D.$\mathrm{J}{\mathrm{s}}^{-1}{\mathrm{m}}^{-1}\mathrm{K}$
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   Answer: A

2. Q812015 · 27 Sept 2015

   Ammonia (${\text{NH}}_3$) obtained from different sources always has same proportion of Nitrogen and Hydrogen. It proves the validity of law of:

   1. A.Reciprocal proportion
   2. B.Constant proportion
   3. C.Multiple proportions
   4. D.None of the above
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   Answer: B

3. Q962015 · 27 Sept 2015

   Who among the following discovered the antibiotic producing fungus from Penicillium genus?

   1. A.Louis Pasteur
   2. B.Sir Alexander Fleming
   3. C.Stanley Prusiner
   4. D.Robert Hooke
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   Answer: B