In which pair of ions both the species contain S-S bond?

(a) S2O72-, S2O32-
(b) S4O62-, S2O32-
(c) S2O72-, S2O82-
(d) S4O62-, S2O72-

Subtopic:  Group 16 - Preparation, Properties & Uses |
 70%
NEET - 2017
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AlF3 is soluble in HF only in presence of KF. It is due to the formation of
(1) K3[AIF3H3]

(2) K3[AIF6]

(3) AlH3

(4) K[AIF3H]

Subtopic:  Group 17 - Preparation, Properties & Uses |
 81%
NEET - 2016
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Hot concentrated sulphuric acid is a moderately strong oxidising agent. Which of the following reaction doe not show oxidising behaviour?

(a) Cu + 2H2SO4 CuSO4 + SO2 + 2H2O

(b) 3S + 2H2SO4 3SO2 + 2H2O

(c) C + 2H2SO4 CO2 + 2SO2 + 2H2O

(d) CaF2 + H2SO4 CaSO4 + 2HF

Subtopic:  Group 16 - Preparation, Properties & Uses |
 74%
NEET - 2016
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Among the following, which one is a wrong statement?

(1) PH5 and BiCl5 do not exist

(2) ρp-dp bonds are present in SO2

(3) SeF4 and CH4 have same shape

(4) I3+ has bent geometry

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
 60%
NEET - 2016
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Copper on heating with concentrated HNO3 produces:

1. Cu(NO3)2 and NO       

2. Cu(NO3)2, NO and NO2

3. Cu(NO3)2 and N2O       

4. Cu(NO3)2 and NO2

Subtopic:  Group 15 - Preparation, Properties & Uses |
 68%
From NCERT
NEET - 2016
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Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option.

Column I     Column II
A. XeF6        1. Distorted octahedral
B. XeO      2. Square planar
C. XeOF    3. Pyramidal
D. XeF4       4. Square pyramidal

Codes
A B C D
(a) 1 2 4 3
(b) 4 3 1 2
(c) 4 1 2 3
(d) 1 3 4 2

Subtopic:  Group 18 - Preparation, Properties & Uses |
 76%
From NCERT
NEET - 2019
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The correct statement about given acids is:

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 |
 65%
From NCERT
NEET - 2016
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The product obtained as a result of a reaction of nitrogen with CaC2 is:

1. CaCN         

2. CaCN3

3. Ca2CN       

4. CaCN2

Subtopic:  Group 15 - Preparation, Properties & Uses |
 62%
NEET - 2016
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Nitrogen dioxide and sulphur dioxide have some properties in common. Which property is

shown by one of these compounds. but not by the other?

1. Forms acid-rain

2. Is a reducing agent

3. Is soluble in water

4. ls used as a food-preservative

Subtopic:  Group 15 - Preparation, Properties & Uses |
 51%
NEET - 2015
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The maximum bond angle at nitrogen is present in which of the following?

1. NO2

2. NO2-

3. NO2+

4. NO3-

Subtopic:  Group 15 - Preparation, Properties & Uses |
 59%
NEET - 2015
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