The original colour of a salt is black- When it is heated its colour is changed from black to red- The salt may be-mercuric oxidezinc oxidelead oxidered lead

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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-

The original colour of a salt is black. When it is heated its colour is changed from black to red. The salt may be:
mercuric oxide
zinc oxide
lead oxide
red lead

Mercury(II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of $H g O$ . It has a red or orange color. Mercury(II) oxide is a solid at room temperature and pressure. It is originally black in colour.

The original colour of a salt is black. When it is heated its colour is changed from black to red. The salt may be:mercuric oxidezinc oxidelead oxidered lead

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.

The original colour of a salt is black. When it is heated its colour is changed from black to red. The salt may be:
mercuric oxide
zinc oxide
lead oxide
red lead

Mercury(II) oxide, also called mercuric oxide or simply mercury oxide, has a formula of $H g O$ . It has a red or orange color. Mercury(II) oxide is a solid at room temperature and pressure. It is originally black in colour.