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 NO2-

4. OF2 is an oxide of fluorine

Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses |
 60%
From NCERT
NEET - 2015
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The variation of the boiling point of the hydrogen halides is in the order HF > HI > HBr > HCl. 
The higher boiling point of hydrogen fluoride is explained as:

1. The electronegativity of flourine is much higher than other elements in group
2. There is strong hydrogen bonding between HF molecules
3. The bond energy of HF molecules is greater than in other hydrogen halides
4. The effect of nuclear shielding is much reduced in flourine which polarizes the HF molecule
Subtopic:  Group 17 - Preparation, Properties & Uses |
 81%
From NCERT
NEET - 2015
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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 |
 79%
From NCERT
NEET - 2015
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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. Is used as a food-preservative

Subtopic:  Group 15 - Preparation, Properties & Uses |
 55%
NEET - 2015
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The acidity of diprotic acids in aqueous solution increases in the order:

1. H2S < H2Se < H2Te

2. H2Se < H2S < H2Te

3. H2Te < H2S < H2Se

4. H2Se < H2Te < H2S

Subtopic:  Group 16 - Preparation, Properties & Uses |
 88%
From NCERT
AIPMT - 2014
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Which of the following compounds does not release oxygen when heated?

1. Zn(ClO3)2
2. K2Cr2O7
3. (NH4)2Cr2O7
4. KClO3

Subtopic:  Group 15 - Preparation, Properties & Uses |
 66%
From NCERT
AIPMT - 2013
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The incorrect statement regarding oxoacids of phosphorus is:

1. Orthophosphoric acid is used in the manufacture of triple superphosphate.
2. Hypophosphorous acid is a diprotic acid.
3. All oxoacids contain tetrahedral four coordinated phosphorus.
4. All oxoacids contain at least one P=O unit and one P-OH group.

Subtopic:  Group 15 - Preparation, Properties & Uses |
 61%
From NCERT
AIPMT - 2012
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Sulphur trioxide can be obtained by which of the following reaction:

1. CaSO4+C

2. Fe2(SO4)3

3. S+H2SO4

4. H2SO4+PCl5

Subtopic:  Group 16 - Preparation, Properties & Uses |
 52%
AIPMT - 2012
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The given sequence among the following arrangements that is not strictly according to the property indicated against it.  

1. H2O < H2S < H2Se < H2Te : \(\small{i n c r e a sin g \  p K_{a}\   v a l u e s}\)
2. \(\small{N H_{3} <   P H_{3} <  A s H_{3} <  S b H_{3} :   i n c r e a sin g  \ a c i d i c  \ c h a r a c t e r}\)
3. \(\small{C O_{} <  S i O_{} <  S n O_{}   <  P b O_{2} :  i n c r e a sin g \  o x i d i sin g  \ p o w e r} \)
4. \(\small{H F  <  H C l   <  H B r  <  H I :  i n c r e a sin g \  a c i d i c  \ s t r e n g t h} \)
Subtopic:  Group 17 - Preparation, Properties & Uses | Group 16 - Preparation, Properties & Uses | Group 15 - Preparation, Properties & Uses |
 79%
From NCERT
AIPMT - 2012
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Which of the following compounds has the lowest melting point?

1.  CaBr2

2.  Cal2

3.  CaF2

4.  CaCl2

Subtopic:  Group 17 - Preparation, Properties & Uses |
 60%
AIPMT - 2011
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NEET 2023 - Target Batch - Aryan Raj Singh
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