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
Dry ice is -
1. Solid NH3
2. Solid SO2
3. Solid CO2
4. Solid N2
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 correct order of ease of hydrolysis is-
1. CCl4 < SiCl4 < PCl5 < AlCl3
2. AlCl3 < CCl4 < PCl5 < SiCl4
3. CCl4 < AlCl3 < PCl5 < SiCl4
4. CCl4 < AlCl3 < SiCl4 < PCl5
A compound among the following that is used in cosmetic surgery is -
1. | Silica | 2. | Silicates |
3. | Silicones | 4. | Zeolites |
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): | If aluminium atoms replace a few silicon atoms in three-dimensional network of silicon dioxide, the overall structure acquires a negative charge. |
Reason (R): | Aluminium is trivalent while silicon is tetravalent. |
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. |
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. |
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. | \(\mathrm{H}_2 ~\text{and} ~\mathrm{O}_2 \) |