Which one of the following is a second order reaction?

H_{2} + B r_{2} \to 2 H B r

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N H_{4} N O_{3} \to N_{2} + 3 H_{2} O

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H_{2} + C l_{2} \to 2 H C l

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C H_{3} C O O C H_{3} + N a O H \to C H_{3} C O O N a + C H_{3} O H

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Solution

The correct option is D $C H_{3} C O O C H_{3} + N a O H \to C H_{3} C O O N a + C H_{3} O H$
Choices (a) and (c) are photochemical reaction of zero order. Choice (b) is first order reaction. In choice (d), rate of reaction depends on 1st power of $C H_{3} C O O C H_{3}$ and NaOH both.

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