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 |
 74%
From NCERT
NEET - 2019
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Compound of sulphur that has -O-Olinkage among the following is:

1. H2SO4, sulphuric acid

2. H2S2O8, peroxodisulphuric acid

3. H2S2O7, pyrosulphuric acid

4. H2SO3, sulphurous acid

Subtopic:  Group 16 - Preparation, Properties & Uses |
 83%
From NCERT
NEET - 2020
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Match the compounds of Xe in column I with the molecular structure in column II.

Column-I Column-II
(a) XeF2 (i) Square planar
(b) XeF4 (ii) Linear
(c) XeO3 (iii) Square pyramidal
(d) XeOF4 (iv) Pyramidal
 
(a) (b) (c) (d)
1. (ii) (i) (iii) (iv)
2. (ii) (iv) (iii) (i)
3. (ii) (iii) (i) (iv)
4. (ii) (i) (iv) (iii)
Subtopic:  Group 18 - Preparation, Properties & Uses |
 78%
From NCERT
NEET - 2020
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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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In the light of the below statements, choose the correct answer from the options given below:
I: Acid strength increases in the order given as HF < HCl < HBr < HI.
II: As the size of the elements F, Cl, Br, I increases down the group, the bond strength of HF, HCI, HBr, and HI decreases and so the acid strength increases.
 
1. I is correct but II is false.
2. I is incorrect but II is true.
3. Both I and II are true.
4. Both I and II are false.
Subtopic:  Group 17 - Preparation, Properties & Uses |
 79%
From NCERT
NEET - 2021
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Choose the incorrect statement among the following regarding noble gases:

1. Noble gases have weak dispersion forces.
2. Noble gases have large positive values of electron gain enthalpy.
3. Noble gases are sparingly soluble in water.
4. Noble gases have very high melting and boiling points.

Subtopic:  Group 18 - Preparation, Properties & Uses |
 59%
From NCERT
NEET - 2021
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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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Identify the correct formula of 'oleum' from the following

1. H2S2O7

2. H2SO3

3. H2SO4

4. H2S2O8

Subtopic:  Group 16 - Preparation, Properties & Uses |
 87%
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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The correct structure of tribromo octoxide is:

1.
2.
3.
4.
Subtopic:  Group 17 - Preparation, Properties & Uses |
 71%
From NCERT
NEET - 2019
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