Physics
A gas thermometer is more sensitive than a liquid thermometer because a gas :

Is lighter than liquid
Expands more than a liquid
Does not change state easily
Is easy to obtain

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Physics
A capillary tube is partially dipped vertically in a vessel containing water. Due to capillarity water rises in the tube. The height of water rise in the tube can be increased by

None of these
Increasing the height of water in the vessel
Increasing the radius of the capillary tube
Decreasing the radius of the capillary tube

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Physics
Lightning is produced when

Similar charges of electricity rush towards each other and then get repelled
Strong opposite charges in different clouds break down the resistance offered by the intervening air
Clouds strike against impurities in air and the friction burns up these impurities
Water vapour produces electricity in the clouds

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