Question

which of the following is not an example of combination reaction . 1. 2H2O+O2- 2H2O, 2. AGNO3+NaCl -AgCl+NaNO3,3.2Mg+O2 -2MgO​

Answer 1

Answer:

2.

Explanation:

The second equation is not example of combination reaction because the combination reaction is the one in which 2 or more reactants react to form a single product, but in second equation there are 2 products.

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Answer 2

The second reaction is not an example of combination reaction. (AgNO3+NaCl -->AgCl + NaNO3.)

• The combination reaction happens when multiple reactants are combined into a single product by the chemical reaction.

Eg. A + B = AB

• But,in the second reaction,only the NO3 and Cl are interchanging their places to make the chemical products of the reaction. So,here no combination of the reactants is happening.

• This is an example of double replacement reaction.