Assertion(A): Elements of Group 16 generally show lower value of first ionisation enthalpy compared to the corresponding periods of group 15.

Reason(R): Elements of Group 16 is more electronegative than elements of Group 15.

1. Both assertion and reason are true, and reason is the correct explanation of the assertion.

2. Both assertion and reason are true, but reason is not the correct explanation of the assertion.

3. Assertion is true but reason is false.

4. Assertion is false but reason is true.

Assertion(A): H₂S is less acidic than H₂Te.
Reason(R): The bond (E–H) dissociation enthalpy decreases down the group in Group 16 hydrides.

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 and R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true

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

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 and R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true

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

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 and R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true

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 assertion and reason are true and reason is the correct explanation of the assertion.

2. Both assertion and reason are true but reason is not the correct explanation of the assertion.

3. Assertion is true but reason is false.

4. Assertion is false but reason is true.

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.

HCl reacts with finely powdered iron, it forms ferrous chloride and not ferric chloride because-

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

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 and R is not the correct explanation of A

3. A is true but R is false

4. A is false but R is true