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प्रश्न
A current of 2.0 ampere passed for 5 hour through a molten salt deposits 22 g of the metal (Atomic mass = 177). The oxidation state of the metal in the metal salt is
पर्याय
+1
+3
+2
+4
MCQ
उत्तर
+3
Explanation:
Q = It = 2 amp × 5 × 60 × 60s = 36000c
Equivalent mass of metal = `(22.2 g)/(3600 c) xx 96500` C = 59.5 g
Valency of the metal = `"Atomic mass"/"Equivalent mass"`
= `177/59.5` = 3
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