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Question
The original colour of a salt is black. When it is heated its colour is changed from black to red. The salt may be:
The original colour of a salt is black. When it is heated its colour is changed from black to red. The salt may be:
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Solution
The correct option is A mercuric oxide
Mercury(II) oxide, also called mercuric oxide or simply mercury
oxide, has a formula of HgO. It has a red or orange color. Mercury(II)
oxide is a solid at room temperature and pressure. It is originally black in colour.
Mercury(II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of HgO. It has a red or orange color. Mercury(II) oxide is a solid at room temperature and pressure. It is originally black in colour.
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