Question
What is order of radioactive decay of a substance ?
MHT CET
Chemistry
Chemical Kinetics
2026
MHT CET 2026 (16 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. 0
- B. 1
- C. 1.5
- D. 2
Answer
B. 1
Step-by-step solution
Radioactive decay follows first-order kinetics. The rate of decay is directly proportional to the number of undecayed nuclei present at that instant. - dN dt = N Since the rate depends on the first power of the number of nuclei, the order of radioactive decay is 1. Answer: 1
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