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प्रश्न
The metals which exhibit – variable valency of 2+ and 4+.
पर्याय
Silver and gold
Lead and tin
Silver and mercury
Gold and iron
MCQ
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उत्तर
Lead and tin
Explanation:
Both Lead (Pb) and Tin (Sn) show variable valencies of 2+ (lower state: plumbous/stannous) and 4+ (higher state: plumbic/stannic).
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