Q. No.The reason behind carbon showing catenation property but lead does not is:
1. Due to the smaller size of C than that of Pb
2. Due to the smaller size of Pb than that of C
3. Due to the smaller ionization energy of C than that of Pb
4. Due to the inert pair effect
The disproportionation reaction of is as follows:
X and Y in the above reaction are:
1. H3PO2, HPO2
2. H3PO4, PH3
3. H2PO6, PO3
4. None of the above.
Identify the correct statements among the following:
a. is used as a refrigerant for ice-cream and frozen food.
b. The structure of contains twelve six-carbon rings and twenty five-carbon rings.
c. ZSM-5, a type of zeolite, is used to convert alcohol into gasoline.
d. CO is a colourless and odourless gas
1. (a) and (c) only
2. (b) and (c) only
3. (c) and (d) only
4. (a), (b) and (c) only
The condition that does not exist in the Haber process
for the manufacturing of ammonia is:
1. Pressure (around 200 ×105 Pa)
2. Temperature (700 K)
3. Catalyst such as iron oxide.
4. Presence of inert gases.
| Assertion (A): | Both rhombic and monoclinic sulphur exist as S8 but oxygen exists as O2. |
| Reason (R): | Oxygen forms pπ - pπ multiple bonds due to its small size and small bond length but pπ - pπ bonding is not possible in sulphur. |
| 1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
| 3. | (A) is True but (R) is False. |
| 4. | Both (A) and (R) are False. |
A solid (A) reacts with strong aqueous NaOH, liberating a foul smelling gas (B), which spontaneously burns in the air, giving smoky rings. A and B are, respectively:
1. P4 (red) and PH3
2. P4 (white) and PH3
3. S8 and H2S
4. P4 (white) and H2S
The basic structural unit of silicates is-
| 1. | \( \mathrm{SiO}_4{}^{4-}\) | 2. | \(\left(\mathrm{SiO}_3\right)^{2-} \) |
| 3. | \(\mathrm{SiO}_4{ }^{2-} \) | 4. | \(\mathrm{SiO}^{-}\) |
Match the compounds of Xe in Column I with the molecular structure in Column II.
| Column-I | Column-II | ||
| (a) | XeF2 | (i) | Square planar |
| (b) | XeF4 | (ii) | Linear |
| (c) | XeO3 | (iii) | Square pyramidal |
| (d) | XeOF4 | (iv) | Pyramidal |
| (a) | (b) | (c) | (d) | |
| 1. | (ii) | (i) | (iii) | (iv) |
| 2. | (ii) | (iv) | (iii) | (i) |
| 3. | (ii) | (iii) | (i) | (iv) |
| 4. | (ii) | (i) | (iv) | (iii) |
is -
1. A Monobasic acid and a weak Lewis acid.
2. A Monobasic and a weak Bronsted acid..
3. A Monobasic and a strong Lewis acid.
4. A Tribasic and a weak Bronsted acid.
Incorrect order among the following is:
| 1. | F2 > Cl2 > Br2 > I2 | Oxidising power |
| 2. | F < Cl > Br > I | Electron gain enthalpy |
| 3. | F2 > Cl2 > Br2 > I2 | Bond dissociation energy |
| 4. | F> Cl > Br > I | Electronegativity |
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