The correct IUPAC name, among the following, is:

1.	Prop-3-yn-1-ol	2.	But-4-ol-4-yne
3.	But-3-ol-2-yne	4.	But-3-yn-1-ol

The number of σ and π bonds in the molecule $C_6{H}_6$ are -

The correct hybridization states of carbon atoms in the following compound are - $\stackrel{1}{\mathrm{\hspace{0.17em}\; \hspace{0.17em}\; C}}{H}_2=\stackrel{2}{C}H-\stackrel{3}{C}\equiv N$
 

In sulphur estimation, 0.157 g of an organic compound gave 0.4813 g of barium sulphate. The percentage of sulphur in the compound is-

1. 39.10 %

2. 48.13 %

3. 42.10 %

4. 52. 43 %

The chiral compound among the following is:

Match Column I with Column II.

Choose the correct answer from the options given below:

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

Codes:

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

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

1.
2.
3.
4.

Which carboxylate ion among the following is the most stable?

1.		2.
3.		4.