(a) Name a metal which is liquid at room temperature. (b) Smoke and fod are aerosols. How do they differ from each other ? (c ) Name an element which melts when kept on the palm.

(a) Name a metal which is liquid at room temperature. (b) Smoke and fo

1.	(a) Name a metal which is liquid at room temperature. (b) Smoke and fod are aerosols. How do they differ from each other ? (c ) Name an element which melts when kept on the palm.
Answer» (a) Metal is mercury (Hg). (b) In smoke, dispersed phase is a solid (dust or carbon particles). In aerosols, it is a liquid (water drops). Dispersion medium in both the cases is the same i.e. air. (c ) It is either gallium (Ga) or cesium (Cs).

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(a) Name a metal which is liquid at room temperature. (b) Smoke and fod are aerosols. How do they differ from each other ? (c ) Name an element which melts when kept on the palm.

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