Given below are two statements: 

Assertion (A): Although electron gain enthalpy of fluorine is less negative as compared to chlorine, fluorine is a stronger oxidising agent than chlorine.
Reason (R): F2 has low enthalpy of dissociation and F has high hydration enthalpy


The correct option is-

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Group 17 - Preparation, Properties & Uses |
 78%
From NCERT
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Given below are two statements: 

Assertion (A): Fluorine exhibits only –1 oxidation state whereas other halogens exhibit + 1, + 3, + 5 and + 7 oxidation states.
Reason (R): Other halogens have d orbitals and therefore, can expand their octets and show +1, +3, +5 and +7 oxidation states also.


 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.



 

Subtopic:  Group 17 - Preparation, Properties & Uses |
 92%
From NCERT
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The incorrect statement among the following is-

1. Cl2 reaction with hot and concentrated NaOH produces NaCl andNaClO3.
2. Cl2 reaction with hot and concentrated NaOH produces NaCl and NaOCl.
3. It is an example of disproportionation reaction.
4. Chlorine from zero oxidation state is changed to –1 and +5 oxidation states.




  

Subtopic:  Group 17 - Preparation, Properties & Uses |
 80%
From NCERT
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HCl reacts with finely powdered iron, it forms ferrous chloride and not ferric chloride because:
 

1. Formation of Cl2 gas prevents ferric chloride formation
2. Formation of H2 gas prevents ferric chloride formation
3. Formation of [FeCl6]4-  prevent ferric chloride formation
4. Formation of  Fe3H prevents ferric chloride formation



 

Subtopic:  Group 17 - Preparation, Properties & Uses |
 62%
From NCERT
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Assertion (A): The elements of Group 18 are known as noble gases.
Reason (R): Group 18 elements are highly reactive.

The correct option is-

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
Subtopic:  Group 18 - Preparation, Properties & Uses |
 87%
From NCERT
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Given below are two statements: 

Assertion (A): Noble gases have very low boiling points.
Reason (R): Noble gases, being monoatomic, have no interatomic forces except weak dispersion forces.

The correct option is:

1. Both (A) and (R) are True and (R) is the correct explanation of (A).
2. Both (A) and (R) are True but (R) is not the correct explanation of (A).
3. (A) is True but (R) is False.
4. (A) is False but (R) is True.
Subtopic:  Group 18 - Preparation, Properties & Uses |
 83%
From NCERT
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Given below are two statements: 
Assertion (A): The hydrolysis of XeF6 is a redox reaction.
Reason (R): The hydrolysis products of XeF6 are XeOF4 and XeO2F2 
The correct option is-
1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.
Subtopic:  Group 18 - Preparation, Properties & Uses |
 57%
From NCERT
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Halogens have maximum negative electron gain enthalpy in the respective periods of the periodic table because-

1. It has smallest size and high effective nuclear charge
2. It has the largest size in in the respective periods
3. It is a strong reducing agent
4. None of the above

Subtopic:  Group 17 - Preparation, Properties & Uses |
 90%
From NCERT
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Consider the following reaction.

CaF2 + H2SO4  C + D

SO3 + H2O    B      


The products B, C and D respectively

1. B = H2SO3; C= CaSO4; D =HF
2. B = H2SO4; C= CaSO4; D =HOF
3. B = H2SO4; C= CaSO4; D =HF
4. B = H2SO3; C= CaSO4; D =HOF
Subtopic:  Group 16 - Preparation, Properties & Uses |
 73%
From NCERT
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Given below are two statements: 

Assertion (A): Sulphur shows paramagnetic behaviour.
Reason (R): S2 does not contain unpaired electron.


 

1. Both (A) and (R) are true and (R) is the correct explanation of (A).
2. Both (A) and (R) are true but (R) is not the correct explanation of (A).
3. (A) is true but (R) is false.
4. (A) is false but (R) is true.

Subtopic:  Group 16 - Preparation, Properties & Uses |
 70%
From NCERT
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