Q. No.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. | NH3 < PH3 < AsH3 < SbH3 | Increasing acidic character |
| 2. | CO2 < SiO2 < SnO2 < 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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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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A compound "X", upon reaction with H2O, produces a colourless gas "Y" with a rotten fish smell. Gas 'Y' is absorbed in a solution of CuSO4 to give Cu3P2 as one of the products. The compound 'X' will be:
1. Ca3P2
2.
3.
4. Ca3(PO4)2
Subtopic: Group 15 - Preparation, Properties & Uses |
71%
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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Which of the following is the incorrect statement?
1. PH5 and BiCl5 do not exist
2. pπ - dπ bonds are present in SO2
3. SeF4 and CH4 have the same shape
4. \(I_{3}^{+}\)
Subtopic: Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
68%
From NCERT
NEET - 2016
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Which is the correct statement for the given acids?
| 1. | Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid |
| 2. | Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid |
| 3. | Both are triprotic acids |
| 4. | Both are diprotic acids |
Subtopic: Group 15 - Preparation, Properties & Uses |
71%
From NCERT
NEET - 2016
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The strong reducing behaviour of H3PO2 is due to:
1. Presence of one -OH group and two P-H bonds.
2. High electron gain enthalpy of phosphorus.
3. High oxidation state of phosphorus.
4. Presence of two -OH groups and one P-H bond.
Subtopic: Group 15 - Preparation, Properties & Uses |
78%
From NCERT
NEET - 2015
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