1. Those reactions in which two or more substances directly combine with each other to form a single substance is called a combination reaction.

    Those reactions in which two or more substances directly combine with each other to form a single substance is called a combination reaction.

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  2. A brown coating of copper gets deposited on the nail due to displacement reaction.

    A brown coating of copper gets deposited on the nail due to displacement reaction.

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  3. Reactions in which energy is absorbed are known as endothermic reactions.

    Reactions in which energy is absorbed are known as endothermic reactions.

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