Consider the following pairs : How many of the pairs given above are correctly matched? Example of Colloid Type of Colloid I. Cloud Aerosol II. Mud Sol III. Milk Emulsion IV. Rubber Foam
Three
Pair I: Cloud – Aerosol: Correct. A cloud consists of tiny liquid water droplets dispersed in air (gas), so it is classified as an aerosol.
Pair II: Mud – Sol: Correct. Mud contains solid particles dispersed in a liquid medium (water), which makes it a sol.
Pair III: Milk – Emulsion: Correct. Milk consists of tiny droplets of fat dispersed in water and is therefore an emulsion.
Pair IV: Rubber – Foam: Incorrect. Ordinary rubber is not classified as a foam. Foam rubber, in which gas is dispersed in a solid medium, is an example of a solid foam.
Therefore, three pairs (I, II and III) are correctly matched.
Correct Answer: Three
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