Answered

A chemical reaction in which two or more substances undergo a chemical union to form a more complex substance is a _______ reaction.

Adouble replacement
Bsubstitution
Cdecomposition
Dcombination

Verified Answer :

Answer : The correct option is, (D) Combination

Explanation :

  • Double replacement reaction : A chemical reaction in which a positive cation and a negative anion of the two reactants exchange places to give two new products or compounds.

        The general representation of this reaction is,

         \(AB+CD\rightarrow AD+CB\)

         (A and C are the cations, B and D are the anions)

  • Substitution reaction : A chemical reaction in which a more reactive element displaces the least reactive element.

        The general representation of this reaction is,

         \(A+BC\rightarrow A+CB\)

  • Decomposition reaction : A chemical reaction in which a bigger compound breaks into two or more smaller compounds or elements.

        The general representation of this reaction is,

         \(AB\rightarrow A+B\)

  • Combination reaction : A chemical reaction in which two or more substances react to form a more complex substance.

        The general representation of this reaction is,

         \(A+B\rightarrow AB\)

Hence, the correct option is, (D) Combination

Answer:d. Combination

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