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100 grams of metal carbonate on calcination gives 56 grams of metal oxide. Atomic weight of the bivalent metal is
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a
40
b
50
c
100
d
20
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Correct option is A
Wmetal carbonateWmetal oxide=Emetal carbonateEmetal oxide; Wmetal carbonateWmetal oxide=EM+EcarbonateEM+Eoxide; 10056=E+30E+8; 44E=880; E=20; AW=EW×Valency; AW=20×2=40;Similar Questions
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