List of top Chemistry Questions on Half life asked in TS EAMCET

The half-life of a radioactive substance is 10 days. After 30 days, fraction remaining is:

The half-life of a first-order reaction is:

Observe the following reaction. This reaction represents: \[ 4HCl + O_2 \xrightarrow{CuCl_2, 723K} 2Cl_2 + 2H_2O \]

The bond angles H-O-N and O-N-O in the planar structure of nitric acid molecule are respectively: