Q.

Statement-I: Ionisation enthalpies of group 15 elements are much greater than that of group 14 elements in corresponding periods.
Statement-II: Oxygen exist as diatomic molecule where sulphur exist as octa atomic molecule.

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a

S-I is true, S-II is false

b

S-I is false, S-II is true

c

Both S-I, S-II are true

d

Both S-I, S-II are false

answer is A.

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Detailed Solution

O2 exists as diatomic molecule.

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Statement-I: Ionisation enthalpies of group 15 elements are much greater than that of group 14 elements in corresponding periods.Statement-II: Oxygen exist as diatomic molecule where sulphur exist as octa atomic molecule.