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Which is the liquid that is used in the cleaning of the battery terminals and clamps to avoid corrosion?

(a) Hydrochloric acid

(b) Dilute sulphuric acid

(c) Liquid ammonia

(d) Liquid nitrogen

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Right option is (c) Liquid ammonia

To explain: Due to oxidation the battery terminals and the clamp must be cleaned after regular intervals. After cleaning with a cloth moistened with liquid ammonia, a coat of petroleum jelly helps to retard their corrosion again.

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