Question

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Answer 1

Explanation:

(A) This is an incomplete combustion reaction so energy will be released.

(B)Combination of nitrogen and oxygen to form Nitrogen Monoxide-

Heat is required for this process.

So N2+O2→2NO−180.6KJ is an endothermic reaction.

(C) combination of glucose and oxygen to form carbon dioxide and water is a combustion reaction.So energy will be released.

(D)in a combination of zinc and hydrochloric acid to form zinc chloride and hydrogen heat is released.

so correct answer is  (B).