Question

mercuric oxide is a red powder when heated in dry test tube ,it gives out liquid mercury and colourless oxygen gas.what conclusion can be given regarding mercuricoxide,Mercury and oxygen as compound, element or mixture

Answer 1

Mercuric oxide is a compound and when it is heated, it decomposes to form mercury and oxygen which are two different elements. Mercury is a liquid metal which is poisonous while oxygen is a light colourless gas which is lighter than mercury.

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Answer 2

Solution :

Mercuric oxide : It is a compound because it splits up into simpler substances mercury and oxygen.

Mercury : It is an element because it cannot be further decomposed into simpler substances.

Oxygen : It is also an element because it cannot be further decomposed into simpler substances.

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