Which one of the following substances does not undergo
a chemical change on heating:
(a) ZnO, (b) Hgo, (c) CuCo, (d) (NH4)2Cr207
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Which one of the following substances does not undergo
a chemical change on heating:
(b) Hgo
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Which one of the following substances does not undergo
a chemical change on heating:
(a) ZnO,
(b) Hgo,
(c) CuCo,
(d) (NH4)2Cr207
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