1.

(1) Element with valency 2,4,6 (2) element with valency 5 ?? Without Google

Answer» Why can \'t it be nitrogen ?
Okk
(1) sulphur (2) phosphorous
Nitrogen
2. Boron
Sulphur & phosphorus
Boron is wrong ?
Right ...ans (1)
Boron
Phosphorus
Yes
U mean to name them ?
Ans it


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