State loss or gain of electrons (giving their number) in the following changes:

State loss or gain of electrons (giving their number) in the following changes:

(i) N ⎯→ N3– (ii) Cl ⎯→ Cl–

(iii) Cu ⎯→ Cu2+ (iv) Cr ⎯→ Cr3+

Ans: – In case (i) electron gain, in case (ii) there is also electron gain, in case (iii) electron are loses and in case (iv) electron are loses.

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