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Q. Old written material which cannot be read easily can be read by
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Q. Paraffin wax used for making candles is obtained from
Q. If lime water is kept in the air, it turns milky due to presence of
Q. Beri -Beri disease is caused by the deficiency of ………………&h...
Q. Neutrons are slowed down in a nuclear reactor by
Q. The branch of medicine involving synthetic chemical compound is
Q. Bats can fly in the dark because
Q. All the following are examples of chemical change, except
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