1.

Which of the following properties decrease from top to bottom down the group in case of hydrides of oxygen family members?

Answer»

Dipole moment
Bond angle
Covalent character
 Thermal stability

Solution :Dipole moment, bond angle and thermal stability decrease from top to bottom down the group in case of hydrides of group 16 elements. Dipole moment and bond angle decrease DUE to decrease in ELECTRONEGATIVITY of the central ATOM and thermal stability decreases due to weakening of the M-H bond as the size of the central atom INCREASES from top to bottom.


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