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 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
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. | \(\mathrm{H}_2 ~\text{and} ~\mathrm{O}_2 \) |
A compound among the following that is not a monomer for a high molecular mass silicone polymer is-
1.
2.
3.
4.
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. | \(\mathrm{SiO}^{-}\) |
When silicon is boiled with caustic soda solution, the gas is evolved is-
1.
2.
3.
4. None of the above
Match the species given in Column I with the properties mentioned in Column II.
Column I | Column II |
A. \(\text{BF}^-_4\) | 1. Oxidation state of the central atom is +4 |
B. AlCl3 | 2. Tetrahedral shape |
C. SnO | 3. Lewis acid |
D. PbO2 | 4. Can be further oxidized |
Codes:
A | B | C | D | |
1. | 2 | 3 | 4 | 1 |
2. | 1 | 2 | 3 | 4 |
3. | 1 | 4 | 3 | 2 |
4. | 4 | 1 | 3 | 2 |
Match the species given in Column I with properties given in Column II.
Column I | Column II | ||
A. | Diborane | 1. | Used as a flux for soldering metals |
B. | Quartz | 2. | Crystalline form of silica |
C. | Borax | 3. | Banana bonds |
D. | Aluminosilicate | 4. | Used as a catalyst in petrochemical industries |
A | B | C | D | |
1. | 3 | 4 | 1 | 2 |
2. | 1 | 2 | 3 | 4 |
3. | 3 | 2 | 1 | 4 |
4. | 4 | 1 | 3 | 2 |
Given below are two statements:
Assertion (A): | Silicones are water-repelling in nature. |
Reason (R): | Silicones are organosilicon polymers, which have ( - R2SiO - ) as repeating units. |
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. | (A) is False but (R) is True. |
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.