Oxidation number of P in pyrophosphoric acid is:

1.  +5
2.  +2
3.  +3
4.  +4

Subtopic:  Group 15 - Preparation, Properties & Uses |
 78%
From NCERT
AIPMT - 1999
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

A compound having two direct bonds between P and H atoms is:

1. H3PO2

2. H3PO3

3. H3PO4

4. H4P2O7

Subtopic:  Group 15 - Preparation, Properties & Uses |
 81%
From NCERT
AIPMT - 1999
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
Links
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

General behavior of O3 is: 

1. To give electrons
2. To Give O2
3. Reaction with H2
4. To accept electrons

Subtopic:  Group 16 - Preparation, Properties & Uses |
 67%
From NCERT
AIPMT - 1999
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

 Wrong statement among the following is:

1. Bond energy of F2 > Cl2

2. Electronegativity of F > Cl

3. F is more oxidizing than Cl

4. Electron affinity of Cl > F

Subtopic:  Group 17 - Preparation, Properties & Uses |
 82%
From NCERT
AIPMT - 2000
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

From the given options, the compound that has a planar structure is:
1. XeF4
2. XeOF2
3. XeO2F2
4. XeO4

Subtopic:  Group 18 - Preparation, Properties & Uses |
 79%
From NCERT
AIPMT - 2000
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

In X- H ----- Y, X, and Y both are electronegative elements. The correct statement among the following is:

1. Electron density on X will increase and on H will decrease.
2. In both electron density will increase.
3. In both electron density will decrease.
4. On X electron density will decrease and on H increases.
Subtopic:  Group 17 - Preparation, Properties & Uses |
 61%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Nitrogen form N2, but phosphorous  form P2, it's at a time convert in P4, reason is:

1. Triple bond present between phosphorous atoms. 
2. pπ-pπ bonding is weak in phosphorous.
3. pπ-pπ bonding is strong in phosphorous.
4. Multiple bonds easily form phosphorous.

Subtopic:  Group 15 - Preparation, Properties & Uses |
 73%
From NCERT
AIPMT - 2001
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The correct statement among the following is:

1. Silicon exhibits 8 coordination numbers in its compound.
2. The bond energy of F2 is less than Cl2.
3. Mn(III) oxidation state is more stable than Mn (II) in an aqueous state.
4. Elements of 15th gp show only + 3 and + 5 oxidation states.
Subtopic:  Group 17 - Preparation, Properties & Uses |
 76%
From NCERT
AIPMT - 2002
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

Incorrect statement among the following is:

1. Among halide ions, iodide is the most powerful reducing agent.
2. Fluorine is the only halogen that does not show a variable oxidation state.
3. HOCl is a stronger acid than HOBr
4. HF is a stronger acid than HCl
Subtopic:  Group 17 - Preparation, Properties & Uses |
 70%
From NCERT
AIPMT - 2003
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
Hints
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh

The correct order of acid strength is -

1. HClO4<HClO3<HClO2<HClO

2. HClO2<HClO3<HClO4<HClO

3. HClO4<HClO<HClO2<HClO3

4. HClO<HClO2<HClO3<HClO4

Subtopic:  Group 17 - Preparation, Properties & Uses |
 88%
AIPMT - 2005
Please attempt this question first.
Hints