Question

In most cases, for a rise of $10 \,K$ temperature, the rate constant is doubled to tripled. This is due to the reason that

• A. collision frequency increases by a factor of 2 to 3 .
• B. fraction of molecules possessing threshold energy increases by a factor of 2 to 3
• C. activation energy is lowered by a factor of 2 to 3 .
• D. none of these

Answer 1

Answer: (B)

For a $10 \,K$ rise in temperature, collision frequency increases merely by $1$ to $2 \%$ but the number of effective collisions increases by $100$ to $200 \%$.