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(a) Elements of group 16 generally show ...

(a) Elements of group `16` generally show lower value of first ionisation enthalpy as compared to the corresponding periods of group `15`. Why ?
(b) `H_2 S` is less than acidic than `H_2 Te`. Why ?

Text Solution

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Due to extra stable half-filled p orbitals of group-15 larger amount of energy is required to remove electron as compared to group 16.
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