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    Chemistry
    Grade-10
    Easy

    Question

    A chemical change in which two substances react to form a new substance is a ___________.

    1. Decomposition reaction
    2. Combination reaction
    3. Precipitation reaction
    4. Combustion reaction

    hintHint:

    The processes, in which a substance or substances undergo a chemical change and combine to produce a new substance or substances, with entirely new properties are known as a chemical reaction.

    The correct answer is: Combination reaction

      A chemical change in which two substances react to form a new substance is a Combination reaction. 
      • The reaction in which two or more two elements or compounds combine with one another to form a new compound is called a combination reaction. 
      • A combination reaction occurs when two or more substances (reactants) combine to create a single new chemical (product).
      • Along with the creation of new bonds and the resulting products, a significant quantity of energy is also produced during this reaction in the form of heat.

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