When a small quantity of impurity which sparingly soluble substance
such as detergent is added to the water the surface tension of
water…. a) decreases b) increases c) does not change d) zero
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The presence of impurities either on the surface or dissolved in it, affect surface tension of the liquid. Highly soluble substances increase the surface tension of water, whereas sparingly soluble substances reduce the surface tension of water. The surface tension of a liquid decreases with increase in temperature.
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