Question

10.Riya performs two set of experiments to study electrical conductivity. She takes (A) Mineral water & (B) Saline water. Comment on observation with reason for the experiments. [3]​

Answer 1

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Answer 2

Set I will have more length of foam because it consists of soft water.  Set II will form less foam because it consists of hard water due to the presence of CaSO4.

Explanation:

• When Riya took Saline water in 2nd set of experiment she observed that the saline water is able to conduct electricity because water that is not in pure form is good conductor of electricity in presence of impurities or ions which helps to conduct electricity.