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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Links
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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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Which of the statements given below is incorrect?

1. Cl2O7 is an anhydride of perchloric acid

2. O3 molecule is bent

3. ONF is isoelectronic with Anionic NO2

4. OF2 is an oxide of fluorine

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
 54%
NEET - 2015
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