The number of linkage groups in $Pisum$ $sativum$ is:

Which element is responsible for the crimson red color in fireworks?

Which hormone causes stunted growth in pea?

The metal used for the de-bromination reaction of $1, 2-dibromoethane$ is:

In the following reaction,$A$ and $B$ respectively are:
$A$ $\xrightarrow{HBr} C_2H_5Br$ $\xrightarrow{B} A$

In the circuit shown,a meter bridge is in its balanced state. The meter bridge wire has a resistance of $0.1 \ \Omega/cm$. Find the value of the unknown resistance $X$ and the current drawn from the battery of negligible internal resistance.