Ball bearings are used in bicycles, cars, etc., because

Fruits stored in a cold chamber exhibit longer storage life because

Which one among the following industries is the maximum consumer of water in India?

During a thunderstorm, the thunder in the skies is produced by the
1. meeting of cumulonimbus clouds in the sky
2. lightning that separates the nimbus clouds
3. violent upward movement of air and water particles

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Which of the following is / are the characteristic/ characteristics of Indian coal?
1. High ash content
2. Low sulphur content
3. Low ash fusion temperature

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With reference to the food chains in ecosystems, which of the following kinds of organism is / are known as decomposer organism/organisms?
1. Virus
2. Fungi
3. Bacteria

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