Which of the following reaction involve chemical reactions? answer choices Storing of oxygen gas under pressure in a gas cylinder. Liquefaction of air Keeping petrol in a china dish in open Heating of copper wire

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The following reaction involve chemical reactions: Heating of copper wire.

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which of the following gases can be used for storage of fresh sample of an oil for a long time? answer choices Carbon dioxide and oxygen Nitrogen and oxygen Carbon dioxide and Helium Helium and Nitrogen.

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which of the following is exothermic reaction? answer choices Evaporation of water Dilution of acid Sublimation of camphore Decomposition of chlorine

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Dilution of acid is exothermic reaction.

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which of the following is exothermic reaction? answer choices Evaporation of water Dilution of acid Sublimation of camphore Decomposition of chlorine

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which of the following is exothermic reaction? answer choices Evaporation of water Dilution of acid Sublimation of camphore Decomposition of chlorine

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