Chemistry

Problem

Decomposition of X exhibits a rate constant of

0.05 \mu\text{g/year}

. How many years are required for the decomposition of

5 \mu\text{g}

of X into

2.5 \mu\text{g}

? [JEE MAINS - ONLINE - 2019] (1) 50 (2) 25 (3) 20 (4) 40