When the temperature of a reaction is increased by 20oC, the rate of reaction increases by
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → 4 times
A rise of 20°C is two steps of 10°C, and each step doubles the rate:
\( \text{rate increases by } 2 \times 2 = 2^{20/10} = 4 \text{ times} \)
NCERT (2026-27 edition):
Temperature Dependence of the Rate of a Reaction – …
