1. Intramolecular hydrogen bonding is present in

(1).

(2).

(3).

(4).

2. Match List-I with List-II

Choose the correct answer from the options given below:

(1).A-III, B-IV, C-I, D-II

(2). A-II, B-III, C-IV, D-I

(3). A-I, B-IV, C-II, D-III

(4). A-II, B-IV, C-III, D-I

3. Given below are two statements:
Statement I: The boiling point of hygrates of Group 16 elements follow the order
\(\text{H}_2\text{O}\,>\,\text{H}_2\text{Te}\,>\,\text{H}_2\text{Se}\,>\,\text{H}_2\text{S}\)
Statement II: On the basis of molecular mass, \(\text{H}_2\text{O}\) is expected to have lower boiling point than the other members of the group but due to the presence of extensive H-bonding in \(\text{H}_2\text{O}\), it has higher boiling point.

(1).Statement I is true, but Statement II is false.

(2). Statement I is false, but Statement II is true..

(3). Both Statement I and Statement II are true.

(4). Both Statement I and Statement II are false.

4. The energy of an electron in the ground state (n = 1) for \(\text{He}^+\) ion is \(-x\text{J}\), then that for an electron in n = 2 state for \(\text{Be}^{3+}\) ion in J is:

(1).\(\displaystyle-\,4x\)

(2). \(\displaystyle-\,\frac{4}{9}x\)

(3). \(\displaystyle-\,x\)

(4). \(\displaystyle-\,\frac{x}{9}\)

5. Match List-I with List-II

Choose the correct answer from the options given below:

(1).A-III, B-IV, C-II, D-I

(2). A-II, B-I, C-IV, D-III

(3). A-I, B-III, C-II, D-IV

(4). A-III, B-IV, C-I, D-II

6. The ratio of the wavelengths of the light absorbed by a Hydrogen atom when it undergoes n = 2 → n = 3 and n = 4 → n = 6 transitions, respectively, is

(1).\(\displaystyle \frac{1}{4}\)

(2). \(\displaystyle \frac{1}{36}\)

(3). \(\displaystyle \frac{1}{16}\)

(4). \(\displaystyle \frac{1}{9}\)

7. Dalton's Atomic theory could not explain which of the following?

(1).Law of gaseous volume

(2). Law of conservation of mass

(3). Law of constant proportion

(4). Law of multiple proportion

8. Energy and radius of first Bohr orbit of He⁺ and Li²⁺ are
[Given R_H = 2.18 × 10^-18 J, ao = 52.9 pm]

(1).\(E_n\left(Li^{2+}\right)\, =\, -8.72 \times 10^{-16}\, J\);
\(r_n\left(Li^{2+}\right)\, =\, 17.6\, pm\)
\(E_n\left(He^{+}\right)\, =\, -19.62 \times 10^{-16}\, J\);
\(r_n\left(He^{+}\right)\, =\, 17.6\, pm\)

(2). \(E_n\left(Li^{2+}\right)\, =\, -19.62 \times 10^{-18}\, J\);
\(r_n\left(Li^{2+}\right)\, =\, 17.6\, pm\)
\(E_n\left(He^{+}\right)\, =\, -8.72 \times 10^{-18}\, J\);
\(r_n\left(He^{+}\right)\, =\, 26.4\, pm\)

(3). \(E_n\left(Li^{2+}\right)\, =\, -8.72 \times 10^{-18}\, J\);
\(r_n\left(Li^{2+}\right)\, =\, 26.4\, pm\)
\(E_n\left(He^{+}\right)\, =\, -19.62 \times 10^{-18}\, J\);
\(r_n\left(He^{+}\right)\, =\, 17.6\, pm\)

(4). \(E_n\left(Li^{2+}\right)\, =\, -19.62 \times 10^{-16}\, J\);
\(r_n\left(Li^{2+}\right)\, =\, 17.6\, pm\)
\(E_n\left(He^{+}\right)\, =\, -8.72 \times 10^{-16}\, J\);
\(r_n\left(He^{+}\right)\, =\, 26.4\, pm\)