Question

Ratio of $t_{75\%}$ to $t_{50\%}$ for a $2^{\text{nd }}$ order reaction is : (where $t_{75\%}=$ time for $75\%$ completion of reaction)

• A. $1$
• B. $2$
• C. $3$
• D. $4$

Answer 1

Answer: (C)

For $2^{\text{nd }}$ order reaction
$100\frac{\to }{t=10\min }50\frac{\to }{t=20\min }25$
$\frac{t_{75\%}}{t_{50\%}}=\frac{30}{10}=3$