Which one of the following is not a reversible reaction?

2 H I (g) ⇌ H_{2} (g) + I_{2} (g)

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P {C l}_{5} (g) ⇌ P {C l}_{3} (g) + {C l}_{2} (g)

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2 K C l O_{3} (s) ⇌ 2 K C l (s) + 3 O_{2} (g)

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C a {C O}_{3} (s) ⇌ C a O (s) + {C O}_{2} (g)

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Solution

The correct option is D $2 K C l O_{3} (s) ⇌ 2 K C l (s) + 3 O_{2} (g)$
In some reactions, products cannot be converted into reactants under similar set of conditions. These reactions go to completion after certain length of time. These reactions are called irreversible reaction. The decomposition of potassium chlorate given in option C is irreversible reaction.

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Similar questions

K_{P} = K_{C}

P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)

2 H I (g) ⇌ H_{2} (g) + I_{2} (g)

N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)

2 H I_{(g)} ⟶ H_{2 (g)} + I_{2 (g)}

2 N H_{3 (g)} ⟶ N_{2 (g)} + 3 H_{2 (g)}

2 N O_{(g)} ⟶ N_{2 (g)} + O_{2 (g)}

P C l_{5 (g)} ⟶ P C l_{3 (g)} + C l_{2 (g)}

2 K C l O_{3} (s) ⟶ 2 K C l (s) + 3 O_{2} (g)

P C l_{5} (g) ⇌ P C l_{3} (g) + C l_{2} (g)

2 H I (g) ⇌ H_{2} (g) + I_{2} (g)

N_{2} (g) + 3 H_{2} (g) ⇌ 2 N H_{3} (g)

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