1.

(A): Nitrogen is unable to show a valency more than three. (R): Nitrogen does not have vacant d-orbitals in its valence shell.

Answer»

Both (A) and (R ) are true and (R ) is the CORRECT explanation of (A)
Both (A) and (R ) are true and (R ) is not the correct explanation of (A)
(A) is true but (R ) is false
Both (A) and (R ) are false

ANSWER :1


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