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Washing soda `(Na_(2)CO_(3))` is a compound because the constituents combine
A. chemically in fixed ratio by weight
B. chemically in any ratio by weight.
C. physically in fixed ratio by weight.
D. physically in any ratio by weight.

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Correct Answer - A
In washing soda `(Na_(2)CO_(3))`, the constituents are combined chemically in fixed ration of their weights and hance it is a compound.

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