An electrophile among the following is :

1.	\(\mathrm{OH}^-\)	2.	\(\mathrm{NC}^-\)
3.	\(R_3C^-\)	4.	Carbonyl group

Geometrical isomerism can be shown by:

1.
2.
3.
4.

Which carboxylate ion among the following is the most stable?

1.		2.
3.		4.

The correct representation involving heterolytic fission of ${\mathrm{CH}}_3-\mathrm{Br}$ among the following is:

1.
2.
3.
4.

The addition of HCl to an alkene proceeds in two steps. The first step is the attack of H⁺ ion on the double bond portion. The same can be shown as-

1.		2.
3.		4.	All of these are possible

Match the type of mixture of compounds in Column-I with the technique of separation/purification given in Column-II.

Codes:

Match Column I with Column II.

Choose the correct answer from the options given below:

${\mathrm{O}}_2{\mathrm{NCH}}_2{\mathrm{CH}}_2{\mathrm{O}}^{-}$ is more stable than ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{O}}^{-}$ because :

The most stable carbocation among the following is-
1. \(({CH_3})_3C\overset{+}{C}H_2\)
2. \(({CH_3})_3\overset{+}{C}\)
3. \({CH_3}CH_2\overset{+}{C}H_2\)
4. \(({CH_3})\overset{+}{C}HCH_2CH_3\)

Metallic sodium is fused with organic compounds for testing nitrogen, sulphur, and halogens. The correct reason behind this is: