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 |
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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 |
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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 |
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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 |
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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 |
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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 |
 65%
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