Which one of the following is not a reversible reaction?Ca{ CO }_{ 3 }(s)rightleftharpoons CaO(s)+{ CO }_{ 2 }(g)2HI(g)rightleftharpoons { H }_{ 2 }(g)+{ I }_{ 2 }(g)P{ Cl }_{ 5 }(g)rightleftharpoons P{ Cl }_{ 3 }(g)+{ Cl }_{ 2 }(g)2KCl{ O }_{ 3 }(s)right (2024)

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A

2KClO3(s)2KCl(s)+3O2(g)

B

2HI(g)H2(g)+I2(g)

C

PCl5(g)PCl3(g)+Cl2(g)

D

CaCO3(s)CaO(s)+CO2(g)

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Solution

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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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Which one of the following is not a reversible reaction?Ca{ CO }_{ 3 }(s)rightleftharpoons CaO(s)+{ CO }_{ 2 }(g)2HI(g)rightleftharpoons { H }_{ 2 }(g)+{ I }_{ 2 }(g)P{ Cl }_{ 5 }(g)rightleftharpoons P{ Cl }_{ 3 }(g)+{ Cl }_{ 2 }(g)2KCl{ O }_{ 3 }(s)right (2024)
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