Which one of the following reactions is an example of auto-catalysis ?

2 {A s H}_{3} (s) \to 2 A s (s) + 3 H_{2} (g)

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N_{2} (g) \to 3 H_{2} (g) F e (g) \to 2 N H_{3} (g)

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{2 S O}_{2} (g) \to O_{2} (g) N O (g) \to 2 S O_{3} (g)

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C_{12} H_{22} O_{H} (l) + H_{2} O (l) H^{-} (l) \to C_{6} H_{12} O_{6} (l) {H C}_{6} H_{12} O_{6} (l)

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Solution

The correct option is D $2 {A s H}_{3} (s) \to 2 A s (s) + 3 H_{2} (g)$
Auto-catalysis is defined as the reaction that is catalyzed by one of its product. in auto-catalysis product of reaction acts as a catalyst for the reaction. In auto-catalysis the initial rate of reaction rises as the catalytic product is formed instead of decreasing steadily.
for example: the free arsenic produced by decomposition of arsine auto catalyses the reaction. The thermal decomposition of Arsine produces arsenic and hydrogen. 2AsH3 forms 2As + 3H2

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Similar questions

C_{12} H_{22} O_{11} + H_{2} O H^{+} - - \to C_{6} H_{12} O_{6} + C_{6} H_{12} O_{6}

C_{12} H_{26} \to C_{6} H_{12} + C_{6} H_{14}

C_{12} H_{26} ⟶ C_{6} H_{12} + C_{6} H_{14}

The reaction: 2 S O_{2} (g) + O_{2} (g) N O (g) ⟶ 2 S O_{3} (g)

C_{12} H_{22} O_{11} + H_{2} O \to C_{6} H_{12} O_{6} + C_{6} H_{12} O_{6}

2.12 \times 10^{- 4} L {m o l}^{- 1} {s e c}^{- 1}

27^{o} C

1.07 \times 10^{5} J {m o l}^{- 1}

37^{o} C

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