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.
When silicon is boiled with caustic soda solution, the gas is evolved is-
1.
2.
3.
4. None of the above
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. | \(\mathrm{SiO}^{-}\) |
A compound among the following that is not a monomer for a high molecular mass silicone polymer is-
1.
2.
3.
4.
Aluminium reacts with concentrated HCl and concentrated NaOH to liberate which of the following gases respectively-
1. | \(\mathrm{H}_2 ~\text{and} ~\mathrm{H}_2 \) | 2. | \(\mathrm{O}_2 ~\text{and} ~\mathrm{O}_2 \) |
3. | \(\mathrm{O}_2 ~\text{and} ~\mathrm{H}_2 \) | 4. | \(\mathrm{H}_2 ~\text{and} ~\mathrm{O}_2 \) |
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
Assertion: B-X bond length in is shorter than the expected value.
Reason: back bonding occurs between B and X.
1. Both Assertion & Reason are true and the reason is the correct explanation of the assertion.
2. Both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
3. Assertion is a true statement but Reason is false.
4. Both Assertion and Reason are false statements.
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
Carbon dioxide is a gas but silica is a solid because:
1. Carbon dioxide is composed of discrete covalent molecules whereas silica has a continuous tetrahedral structure.
2. molecules are lighter than molecules.
3. is more acidic than .
4. The melting point of silica is very high.
A compound X, of boron, reacts with on heating to give another compound Y which is called inorganic benzene. The compound X can be prepared by treating with Lithium aluminium hydride. The compounds X and Y are represented by the formulas -
1. | \(\mathrm{B}_2 \mathrm{H}_6, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 2. | \(\mathrm{B}_2 \mathrm{O}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) |
3. | \(\mathrm{BF}_3, \mathrm{~B}_3 \mathrm{~N}_3 \mathrm{H}_6 \) | 4. | \(\mathrm{B}_3 \mathrm{~N}_3 \mathrm{H}_6, \mathrm{~B}_2 \mathrm{H}_6\) |