Which one of the following vitamins is water-soluble?

1.	Vitamin-B	2.	Vitamin-E
3.	Vitamin-K	4.	Vitamin-A

If there is no rotation of plane-polarized light by a compound in a specific solvent thought to be chiral, it may mean that:

1. The compound is certainly a chiral.

2. The compound is certainly meso.

3. There is no compound in the solvent.

4. The compound may be a racemic mixture.

Consider the following sets of quantum numbers:

Which of the following sets of quantum numbers is not possible?

1. ii, iii, and iv
2. i, ii, iii, and iv
3. ii, iv and v
4. i and iii

Which one of the following ions is the most stable in an aqueous solution? 
(At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)

1. \(\text{Cr}^{3 +}\)

2. \(\text V^{3 +}\)

3. \(\text{Ti}^{3 +}\)

4. \(\text{Mn}^{3 +}\)

Concentrated aqueous sulphuric acid is 98% H₂SO₄ by mass and has a density of 1.80 g mL^-1.
The volume of acid required to make one litre of 0.1 M H₂SO₄ solution is:

The ionic species that has the greatest proton affinity to form stable compound is:

1. $H{S}^{-}$

2. $N{H}_2^{-}$

3. $F^{-}$

4. $l^{-}$

CH₃— CHCl—CH₂—CH₃ has a chiral center. Which one of the following represents its R configuration?

1. \(H_{3}C - \underset{H}{\overset{C_{2}H_{5}}{\underset{|}{\overset{|}{C}}}} - {Cl}\)
2. \(H - \underset{Cl}{\overset{C_{2}H_{5}}{\underset{|}{\overset{|}{C}}}} - {CH}_{3}\)
3. \({Cl} - \underset{H}{\overset{C_{2}H_{5}}{\underset{|}{\overset{|}{C}}}} - {CH}_{3}\)
4. \(H - \underset{C_{2}H_{5}}{\overset{{CH}_{3}}{\underset{|}{\overset{|}{C}}}} - {Cl}\)

0.5 molal aqueous solution of a weak acid (HX) is 20 % ionised. The lowering in the freezing point of the solution will be:
[K_f for water = 1.86 K kg mol^-1]

1. -1.12 K

2. 0.56 K

3. 1.12 K

4. -0.56 K

Which one of the following polymers is prepared by condensation polymerization?

1. Nylon-6, 6

2. Teflon

3. Rubber

4. Styrene

The Langmuir adsorption isotherm is deduced using the assumption: