Which of the following is a biofertilizer?

Consider a gas phase reaction which occurs in a closed vessel: $2A \rightarrow 4B + C$. The concentration of $B$ is found to be increased by $5 \times 10^{-3} \ mol \ L^{-1}$ in $10 \ s$. The rate of disappearance of $A$ (in $mol \ L^{-1} \ s^{-1}$) is:

What is the concentration of $20$ volume $H_2O_2$ in $g/L$?

In the following common emitter circuit,if $\beta = 100$,$V_{CE} = 7 \, V$,$V_{BE} = 0 \, V$ (negligible),and $R_C = 2 \, k\Omega$,then $I_B$ is.......$mA$.

Crystalline sodium chloride is an insulator of electricity because $......$

Variable number of tandem repeats $(VNTRs)$ in the $DNA$ molecule are highly useful in: