On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be

On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be
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On heating, a white amorphous inorganic compound becomes yellow and on cooling, turns white again. The salt may be A. ... `ZnCO_(3)` D. `K_(2)CO_(3)`
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