The chemical formula of 'tear gas' is

Which of the following is the weakest reducing agent?

The product is:

Which is the correct option for sulphur-containing amino acids?

In the circuit shown in the figure, what is the value of $I_1$ just after pressing the key $K$?

In an experiment of a simple pendulum, the errors in the measurement of length of the pendulum $(L)$ and time period $(T)$ are $3 \%$ and $2 \%$, respectively. The maximum percentage error in the value of $\frac{L}{T^2}$ is (in $\%$)