A species among the following that decomposes easily is: -
1. | \(\mathrm{Pbl}_2 \) | 2. | \(\mathrm{Pbl}_4 \) |
3. | \(\mathrm{PbCH}_3 \mathrm{COO}_4 \) | 4. | \(\mathrm{PbCl}_2\) |
A strong oxidizing agent among the following is -
1.
2.
3.
4.
From the following, the compound(s) that react(s) with \(\mathrm{BF}_3\) is/are -
1. | Ethers | 2. | \( \mathrm{H}_2 \mathrm{O} \) |
3. | \(\mathrm{NH}_3 \) | 4. | All of the above |
The products formed by the oxidation of are:
1.
2.
3.
4.
Ionization enthalpy () for the elements of Group 13 follows the order.
1. | B > Al > Ga > In > Tl | 2. | B < Al < Ga < In < Tl |
3. | B < Al > Ga < In > Tl | 4. | B > Al < Ga > In < Tl |
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. | \(\mathrm{B}_3 \mathrm{~N}_3 \mathrm{H}_6, \mathrm{~B}_2 \mathrm{H}_6\) |
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.
Carbogen is:
1. A mixture of .
2. Used by pneumonia patients for respiration.
3. Used by victims of for respiration.
4. All of the above.
Death due to gunshot is caused by poisoning of:
1. Hg
2. Pb
3. Fe
4. As
Consider the following reaction
The correct statement among the following is -
1. (A) is
2. (C) is
3. (C) is
4. (B) is