Chemistry - MOST IMPORTANT CAPF Previous Year Questions

Latent heat corresponds to the change in heat at constant

Which one among the following statements about matter is NOT correct?

Water at 273 K is less effective in cooling than ice at the same temperature. It is because :

Steam at 100°C is more effective in heating than water at the same temperature because

Lowering the atmospheric pressure on a liquid

How is the rate of transpiration affected by decreasing humidity and by decreasing light intensity?

Which one of the following statements is not correct?

Relative humidity

Which of the following are not chemical changes? 1. Tempering of iron 2. Conversion of iron piece into an electro-magnet by passing the current around the iron 3. Melting of iron 4. Rusting of iron. Select the correct answer using the code given below :

Which one among the following statements is correct?

Which one among the following is a physical process?

Statement I: Heavy water is used as moderator in nuclear reactor. Statement II: Thermal neutrons are used for fission reaction in a reactor.

Statement I: Conversion of coal to diamond is a physical change. Statement II: Physical change does not change the composition of the material.

If four balloons A, B, C and D are filled with hydrogen, oxygen, helium and nitrogen gases respectively and left in air, which balloon reaches to the highest distance from the Earth?

Gases may be distinguished from other forms of matter by their :

According to the principle of energy conservation, when a piston in an automobile engine compresses the gas in a cylinder, which of the following must occur?

Packets of potato chips are usually flushed with which one of the following gases to prevent rancidity?

A change of state directly from solid to gas without changing into liquid state is called :

Water is a good solvent for dissolving ionic compounds because

Which one among the following is an example of endothermic process ?