Q.

Statement – I : Among Chalcogens, oxygen has the less negative electron gain enthalpy, while sulphur has more negative electron gain enthalpy  value.
Statement – II : Oxygen possesses smallest size among Chalcogens.

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a

Statement – I is incorrect while statement – II is correct

b

Both statement – I and statement – II are correct

c

Statement – I is correct but statement – II is incorrect

d

Both statement – I and statement – II are incorrect

answer is A.

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Detailed Solution

Oxygen has much small size  than ‘S’ : vacant d-orbitals

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Statement – I : Among Chalcogens, oxygen has the less negative electron gain enthalpy, while sulphur has more negative electron gain enthalpy  value.Statement – II : Oxygen possesses smallest size among Chalcogens.