Assertion: R3P = O exists but R3N = O does not (R = alkyl group).

Reason: Nitrogen doesn't have d orbitals.

1. Assertion is correct and reason is the correct explanation of assertion.

2. Assertion is true but reason is not the correct explanation of assertion.

3. Assertion is true but reason is false.

4. Both assertion and reason are false.

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Assertion: Nitrogen exists as a diatomic molecule and phosphorus as P4.

Reason: Phosphorus is smaller in size, so it can form P4.

1. Assertion is true and the Reason is the correct explanation of Assertion.

2. Assertion is true and the Reason is not the correct explanation of Assertion.

3. Assertion is true but the Reason is false.

4. Both Assertion and Reason are false.

Subtopic:  Group 15 - Preparation, Properties & Uses |
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The disproportionation reaction of H3PO3 is as follows:

H3PO3  X + Y

What are the values of X and Y in the above reaction?

1. H3PO2, HPO2  

2. H3PO4, PH3

3. H2PO6, PO3

4. None of the above

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Assertion: Phosphorous (V) has a tendency to only gain electrons as it is in its highest oxidation state.

Reason: PCl5 can act as an oxidizing as well as a reducing agent.

1. Assertion is true and Reason is correct explanation of Assertion.

2. Assertion is true but Reason is not the correct explanation of Assertion.

3. Assertion is true but Reason is false.

4. Both Assertion and Reason are false.

  1. If both the assertion and the reason are true and the reason is a correct explanation of the assertion
  2. If both the assertion and reason are true but the reason is not a correct explanation of the assertion
  3. If the assertion is true but the reason is false
  4. If both the assertion and reason are false
Subtopic:  Group 15 - Preparation, Properties & Uses |
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The catalyst that is used in the contact process is:

1. Fe2O3

2. Al2O3

3. V2O5

4. SO3

Subtopic:  Group 16 - Preparation, Properties & Uses |
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The chemical formula of oleum is - 

1. H2S2O8

2. H2S2O7

3. H3S2O6

4. H2SO5

Subtopic:  Group 16 - Preparation, Properties & Uses |
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The correct order of bond dissociation energy of halogens F2, Cl2, Br2 and I2 is-

1. F2 < Cl2 < Br2 < I2

2. I2 > Br2 > F2 > Cl2

3. Cl2 > Br2 < F2 > I2

4. I2 < F2 < Br2 < Cl2

Subtopic:  Group 17 - Preparation, Properties & Uses |
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What is the correct sequence of the basic strength hydrides in increasing order?

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​​​​​​​

Subtopic:  Group 15 - Preparation, Properties & Uses |
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The bonding present in nitrogen molecules is:
1. \(p\pi-p\pi\)
2. \(p\pi-d\pi\)
3. \(d\pi-d\pi\)
4. Only sigma bond

Subtopic:  Group 15 - Preparation, Properties & Uses |
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Which of the following is true about reactivity of group 15 elements?

1. Stability of their hydrides increases down the group.

2. Higher oxides are acidic in nature.

3. All elements form pentahalides.

4. They do not react with metals.

Subtopic:  Group 15 - Preparation, Properties & Uses |
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