MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic Chemistryp -Block Elements (group 15-18)O and O

H₂S is less stable than H₂O because

A.the bonding orbitals of sulphur are larger and more✓ Correct

B.the bonding orbitals of sulphur are smaller and more

C.the bonding orbitals of sulphur are smaller and less

D.H₂O molecules form H bonds but H₂S molecules

Explanation

Sulphur is larger in size compared to oxygen. There is a presence of 3p orbital in sulphur due to which proper overlapping does not take place in the oxide of sulphur. Also, 2 H O undergoes intermolecular H-bonding which increases its thermal stability. Hence, 2 H S is less stable than 2 H O Thus, the correct option is (a)

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