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Two elements A and B combine to form compound X and Y. For the fix mass of A, masses of B combined for the compounds X and Y are in 3:7 ratio. If in compound X, 4 gm of a combines with 12 gm B, then in compound Y, 8 gm of A will combine with ... gm of B.

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answer is B.

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Detailed Solution

$∴ 8 gm A \to 56 gm B .$

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