Q. No.A compound X, of boron, reacts with NH3 on heating to give another compound Y which is called inorganic benzene. The compound X can be prepared by treating BF3 with lithium aluminum hydride. The compounds X and Y are represented by the formulas.
1. B2H6, B3N3H6
2. B2O3, B3N3H6
3. BF3, B3N3H6
4. B3N3H6, B2H6
The most commonly used reducing agent among the following is :
1. AlCl3
2. PbCl2
3. SnCl4
4. SnCl2
The reason for the small radius of Ga compared to Al is-.
a. Poor screening effect of d and f orbitals
b. Increase in nuclear charge
c. Presence of higher orbitals
d. Higher atomic number
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
The linear shape of CO2 is due to _______.
a. sp3 hybridisation of carbon
b. sp hybridisation of carbon
c. bonding between carbon and oxygen
d. sp2 hybridisation of carbon
Choose the correct option
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Me3SiCl is used during polymerization of organ silicones because
| a. | Chain length of organic silicone polymers can be controlled by adding |
| b. | blocks the end terminal of silicone polymer. |
| c. | improves the quality and yield of the polymer. |
| d. | acts as a catalyst during polymerization. |
Choose the correct option:
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
The correct statements among the following are:
| a. | Fullerenes have dangling bonds. |
| b. | Fullerenes are cage-like molecules. |
| c. | Graphite is thermodynamically the most stable allotrope of carbon. |
| d. | Graphite is slippery and hard and therefore used as a dry lubricant in machines. |
1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)
Which of the following statements are correct?
(Answer on the basis of the given figure.)
| a. | The two bridged hydrogen atoms and the two boron atoms lie in one plane |
| b. | Out of six B-H bonds, two bonds can be described in terms of 3-center-2-electron bonds |
| c. | Out of six B-H bonds, four B-H bonds can be described in terms of 3 center 2 electron bonds |
| d. | The four-terminal B-H bonds are two center-two electron angular bonds |
Choose the correct option
1. (a, b, c)
2. (b, c, d)
3. (a, c, d)
4. (a, b, d)
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 |
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