1.

At room temperature \[{{H}_{2}}O\] is a liquid while \[{{H}_{2}}S\] is a gas. The reason is [RPET 1999]

A. Electronegativity of O is greater than S
B. Difference in the bond angles of both the molecules
C. Association takes place in \[{{H}_{2}}O\] due to H-bonding while no H- bonding in \[{{H}_{2}}S\]
D. O and S belong to different periods
Answer» D. O and S belong to different periods


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