Chemistry · NDA previous year questions

2025 30 questions

1. Q712025 · 13 Apr 2025

   What happens when the fat and oil containing food materials are left outside for a long time?

   1. A.Fats and oils in the food get oxidized
   2. B.Fats and oils in the food get reduced
   3. C.Fats and oils in the food get ice-covered
   4. D.No reaction takes place
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   Answer: A

2. Q872025 · 13 Apr 2025

   Which one of the following is NOT a basic property of electric charge?

   1. A.Charges can be added
   2. B.Charge is conserved
   3. C.Charge on a body is always an integral multiple of an electron or a proton charge
   4. D.Charges can be created and destroyed in an isolated system
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   Answer: D

3. Q932025 · 13 Apr 2025

   If the speed of light in carbon disulfide and vacuum is $X$ and $Y$ respectively, then

   1. A.$X<Y$
   2. B.$X>Y$
   3. C.$X\ge Y$
   4. D.$X=Y$
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   Answer: A

4. Q952025 · 13 Apr 2025

   Which one among the following elements is known to be discovered the earliest?

   1. A.Copper
   2. B.Gold
   3. C.Oxygen
   4. D.Uranium
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   Answer: A

5. Q992025 · 13 Apr 2025

   Which one of the following is a non-conventional source of energy?

   1. A.Petroleum
   2. B.Natural Gas
   3. C.Tidal energy
   4. D.Coal
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   Answer: C