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

The element with atomic number $12$ belongs to ......... group and ......... period.

The energy of a photon is $3 \times 10^{-12} \ erg$. What is its wavelength in $nm$?
$(h = 6.62 \times 10^{-27} \ erg \cdot s; c = 3 \times 10^{10} \ cm/s)$

The structural formula of $2$-methyl-$2$-butene is:

Which among the following is a haloarene?

Heating chloroform with aqueous sodium hydroxide solution forms