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

Subtopic:  Group 15 - Preparation, Properties & Uses |
 81%
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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 |
 93%
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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 |
 72%
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The element from group 15 that forms a strong bond with hydrogen is:

1. N 2. P
3. As 4. Sb
Subtopic:  Group 15 - Preparation, Properties & Uses |
 93%
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The condition that does not exist in the Haber process for the manufacturing of ammonia is:

1. Pressure (around 200 ×105 Pa)
2. Temperature (700 K)
3. Catalyst such as iron oxide.
4. Presence of inert gases.

Subtopic:  Group 15 - Preparation, Properties & Uses |
 79%
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Number of moles of copper used when

(i) Copper reacts with dilute nitric acid

(ii) Copper reacts with concentrated nitric acid

are respectively:-

1. 1,1

2. 1,3

3. 3,1

4. 3,3

Subtopic:  Group 15 - 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 |
 55%
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The chemical formula of oleum is - 

1. H2S2O8 2. H2S2O7
3. H3S2O6 4. H2SO5
Subtopic:  Group 16 - Preparation, Properties & Uses |
 90%
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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 |
 92%
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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

Subtopic:  Group 15 - Preparation, Properties & Uses |
 57%
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