The correct order for boiling points of the following compounds is: 

1. AsH3 > PH3 > NH3 > SbH3 > BiH3
2. BiH3 > SbH3 > NH3 > AsH3 > PH3
3. NH3 > PH3 > AsH3 > SbH3 > BiH3
4. PH3 > NH3 > AsH3 > SbH3 > BiH3
Subtopic:  Group 15 - Preparation, Properties & Uses |
 63%
From NCERT
NEET - 2022
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The reaction that is a part of large scale industrial preparation of nitric acid is: 
1. \(\mathrm{NaNO}_3+\mathrm{H}_2 \mathrm{SO}_4\xrightarrow[500~K, \ 9\text{ bar}]{Pt} \mathrm{NaHSO}_4+\mathrm{HNO}_3\)
2. \(4 \mathrm{NH}_3+5 \mathrm{O}_2 \text{(from air)}\xrightarrow[500~K, \ 9\text{ bar}]{Pt} 4 \mathrm{NO}+6 \mathrm{H}_2 \mathrm{O}\)
3. \(4 \mathrm{HPO}_3+2 \mathrm{~N}_2 \mathrm{O}_5\xrightarrow[500~K, \ 9\text{ bar}]{Pt} 4 \mathrm{HNO}_3+\mathrm{P}_4 \mathrm{O}_{10}\)
4. \(\mathrm{Cu}\left(\mathrm{NO}_3\right)_2+2 \mathrm{NO}_2+2 \mathrm{H}_2 \mathrm{O} \\ \xrightarrow[500~K, \ 9\text{ bar}]{Pt} 4 \mathrm{HNO}_3+\mathrm{Cu}\)
Subtopic:  Group 15 - Preparation, Properties & Uses |
 62%
From NCERT
NEET - 2022
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In which one of the following arrangements the given sequence is not strictly according to the properties indicated against it?

1. NH< PH< AsH< SbH3 Increasing acidic character
2. CO< SiO< SnO< PbO2 Increasing oxidizing power
3. HF < HCl < HBr < HI Increasing acidic strength
4. H2O < H2S < H2Se < H2Te Increasing pKa values
Subtopic:  Group 15 - Preparation, Properties & Uses |
 64%
From NCERT
NEET - 2021
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Which one of the following reactions does not come under hydrolysis type reaction?

1. SiCl4(l)+2H2O(l)SiO2(s)+4HCl(aq)

2. Li3N(s)+2H2O(l)NH3(g)+3LiOH(aq)

3. 2F2(g)+2H2O(l)4HF(aq)+O2(g)

4. P4O10(s)+6H2O(l)4H3PO4(aq)

Subtopic:  Group 15 - Preparation, Properties & Uses |
 50%
From NCERT
NEET - 2020
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Match the name of process given in column I with the name of compound given in
column II and mark the correct option.

(a) Pure nitrogen (i) Chlorine
(b) Haber process (ii) Sulphuric acid
(c) Contact process (iii) Ammonia
(d) Deacon's process (iv) Sodium azide or Barium azide
 
(a) (b) (c) (d)
1. (iv) (iii) (ii) (i)
2. (i) (ii) (iii) (iv)
3. (ii) (iv) (i) (iii)
4. (iii) (iv) (ii) (i)
Subtopic:  Group 15 - Preparation, Properties & Uses |
 88%
From NCERT
NEET - 2019
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False statement regarding PCl5 is:

1. PCl5 molecule is non-reactive.
2. Three equatorial P-Cl bonds make an angle of 120° with each other.
3. Two axial  P-Cl bonds make an angle of 180° with each other.
4. Axial P-Cl bonds are longer than equatorial P-Cl bonds.

Subtopic:  Group 15 - Preparation, Properties & Uses |
 76%
From NCERT
NEET - 2019
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Among  the following oxoacids of phosphorus ,the strongest reducing property is for:

1. H4P2O7

2. H3PO3

3. H3PO2

4. H3PO4

Subtopic:  Group 15 - Preparation, Properties & Uses |
 66%
From NCERT
NEET - 2019
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A compound 'X' upon reaction with H2O produces a colorless gas 'Y' with rotton fish smell. Gas 'Y' is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. Predict the compound 'X'

1. Ca3P2

2. NH4Cl

3. As2O3

4. Ca3(PO4)2

Subtopic:  Group 15 - Preparation, Properties & Uses |
 73%
From NCERT
NEET - 2019
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