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Question

10g of a metal carbonate on heating gives 5.6 g of its oxide. The equivalent mass of the metal is ?


A

40

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B

20

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C

10

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D

5

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Solution

The correct option is B

20


Mass of metal carbonateEquiv.mass of metal carbonate
=Mass of metal oxideEquiv.mass of metal oxide
or 10EM+ECO23=10EM+30=5.6EM+EO
=5.6E.M+EO=5.6EM+8EM=20


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