Assertion (A): | R3P = O exists but R3N = O does not (R = alkyl group). |
Reason (R): | Nitrogen doesn't have d orbitals. |
1. | (A) is true and (R) is the correct explanation of (A). |
2. | (A) is true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false |
Assertion (A) | Nitrogen exists as a diatomic molecule and phosphorus as P4. |
Reason (R) | Phosphorus is smaller in size, so it can form P4. |
1. | (A) is true and (R) is the correct explanation of (A). |
2. | (A) is true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false |
The disproportionation reaction of is as follows:
X and Y in the above reaction are:
1. H3PO2, HPO2
2. H3PO4, PH3
3. H2PO6, PO3
4. None of the above.
Assertion (A): | Phosphorous (V) has a tendency to only gain electrons as it is in its highest oxidation state |
Reason (R): | PCl5 can act as an oxidizing as well as a reducing agent. |
1. | (A) is true and (R) is the correct explanation of (A). |
2. | (A) is true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false |
The catalyst that is used in the contact process is:
1. | Fe2O3 | 2. | Al2O3 |
3. | V2O5 | 4. | SO3 |
The chemical formula of oleum is -
1. | H2S2O8 | 2. | H2S2O7 |
3. | H3S2O6 | 4. | H2SO5 |
The correct order of bond dissociation energy of halogens is-
1. F2 < Cl2 < Br2 < I2
2. I2 > Br2 > F2 > Cl2
3. Cl2 > Br2 < F2 > I2
4. I2 < F2 < Br2 < Cl2
The correct increasing order of basic strength of hydrides:
1. BiH3 \(\simeq \) SbH3 < AsH3 < PH3 < NH3
2. BiH3 > NH3 > PH3 > SbH3 > AsH3
3. SbH3 < AsH3 < PH3 < NH3 < BiH3
4. AsH3 > NH3 > PH3 > SbH3 > BiH3
Lead nitrate upon heating gives:
An element that does not show allotropy is:
1. Nitrogen
2. Phosphorus
3. Antimony
4. Arsenic