Chemistry

Problem

The half-life period of a first order reaction is 15 minutes. The amount of substance left after one hour will be: [JEE MAINS - ONLINE - 2014] (1)

\frac{1}{4}

of the original amount (2)

\frac{1}{16}

of the original amount (3)

\frac{1}{32}

of the original amount (4)

\frac{1}{8}

of the original amount