H2 reacts much faster with Cl2 than D2 because

The minimum energy required for atoms or molecules to undergo a successful chemical transformation in a reaction is known as activation energy. Hydrogen reacts more rapidly than D2 with Cl2 because the activation energy of D2 is lower than H2. As deuterium slows down the reaction, this property is utilized for understanding the reaction by replacing H2 with D2. The slow down of a reaction by substituting D2 in place of H2 is known as the deuterium isotope effect

H2 reacts much faster with Cl2 than D2 because

The minimum energy required for atoms or molecules to undergo a successful chemical transformation in a reaction is known as activation energy. Hydrogen reacts more rapidly than D2 with Cl2 because the activation energy of D2 is lower than H2. As deuterium slows down the reaction, this property is utilized for understanding the reaction by replacing H2 with D2. The slow down of a reaction by substituting D2 in place of H2 is known as the deuterium isotope effect

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H₂ reacts much faster with Cl₂ than D₂ because

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rate of diffusion of H₂ is greater than D₂

Both (a) and (b) are correct

None of the above

H₂ has lower energy of activation than D₂

answer is B.

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Detailed Solution

The minimum energy required for atoms or molecules to undergo a successful chemical transformation in a reaction is known as activation energy. Hydrogen reacts more rapidly than D₂ with Cl₂ because the activation energy of D₂ is lower than H₂.

As deuterium slows down the reaction, this property is utilized for understanding the reaction by replacing H₂ with D₂. The slow down of a reaction by substituting D₂ in place of H₂ is known as the deuterium isotope effect

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