10 Questions Available
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1 kg cotton and 1 kg sand, which is more denser? Why?
Liquids and gases can be compressed but it is difficult to compress solids. Why?
Define latent heat of vaporization.
Why do we see water droplets collected on the outer surface of a glass container, containing ice?
A balloon when kept in sun, bursts after some time. Why?
Explain why solids have fixed shape but liquids and gases do not have fixed shape.
Why do people perspire a lot on a hot humid day?
What are fluids?
Explain giving examples the various factors on which rate of evaporation depends.
Why is it advisable to use pressure cooker at higher altitudes?