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Q. No.Although nitrogen exhibits +5 oxidation state but does not form pentahalide because-
| 1. | \(\Delta G \) value is highly negative for the formation of pentahalide |
| 2. | Does not have d orbitals to expand its covalence beyond four |
| 3. | Nitrogen did not react with halide in any oxidation state |
| 4. | None of the above |
Subtopic: Group 15 - Preparation, Properties & Uses |
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PH3 has a lower boiling point than NH3 because-
| 1. | NH3 is ionic compound and PH3 is covalent compound |
| 2. | The size of phosphorus is greater than nitrogen |
| 3. | Strong vander wall forces in NH3 than PH3 |
| 4. | Hydrogen bonding occur in NH3 but not in PH3 |
Subtopic: Group 15 - Preparation, Properties & Uses |
88%
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Consider the following reaction
\(NaN_{3}\overset{\Delta }{\rightarrow}Na + B\)
The product B is-
1. Nascent nitrogen
2. N2
3. Na3N
4. NH3
Subtopic: Group 15 - Preparation, Properties & Uses |
84%
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NH3 act as a Lewis base because-
1. It accept a pair of electron
2. It donate a pair of electron
3. It has vacant d orbital
4. None of the above
Subtopic: Group 15 - Preparation, Properties & Uses |
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Given below are two statements:
| Assertion (A): | NO2 dimerize to form N2O4 |
| Reason (R): | NO2 contains an odd number of valence electrons. On dimerization, a stable N2O4 molecule is formed with an even number of electrons. |
| 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. |
Subtopic: Group 15 - Preparation, Properties & Uses |
92%
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PH3 reacts with HI and formed PH4I, this reaction shows that-
1. PH3 acidic in nature
2. PH3 basic in nature
3. PH3 is a strong lewis acid
4. PH3 is more reactive than NH3 with HI
Subtopic: Group 15 - Preparation, Properties & Uses |
67%
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Given below are two statements:
| Assertion (A): | PCl3 fume in moisture. |
| Reason (R): | PCl3 reacts with water which is present in moisture and for Cl2. |
| 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. |
Subtopic: Group 15 - Preparation, Properties & Uses |
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The incorrect statement about PCl5 among the following is:
| 1. | The hybridization of P in PCl5 is sp3d. |
| 2. | PCl5 decomposed and give PCl3 and Cl2. |
| 3. | All the five bonds in PCl5 molecule equivalent |
| 4. | PCl5 reacts with organic compounds containing –OH group converting them to chloro derivatives. |
Subtopic: Group 15 - Preparation, Properties & Uses |
87%
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Given below are two statements:
| Assertion (A): | H3PO2 is a reducing agent. |
| Reason (R): | All oxyacids of phosphorus that have P-H bonds act as strong reducing agents. H3PO2 has two P-H bonds hence, it acts as a strong reducing agent. |
| 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. |
Subtopic: Group 15 - Preparation, Properties & Uses |
87%
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Given below are two statements:
| Assertion (A): | Elements of Group 16 generally show lower value of first ionisation enthalpy compared to the corresponding periods of group 15. |
| Reason (R): | -Elements of Group 16 is more electronegative than elements of Group 15. |
| 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. |
Subtopic: Group 15 - Preparation, Properties & Uses |
66%
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