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Chemistry CBSE Live product
Class 10
Carbon and its compounds
Chemistry of ethanol, ethanoic acid, soaps and detergents
10.
Soaps and detergents
Question:
1
m.
Identify the correct answer:
Assertion:
When soap combines with hard water forms a thin layer (precipitates of metal ions) known as scum.
Reason:
The presence of sodium and potassium ions in hard water limits the cleaning action of soap.
Both A and R are true, and R is the correct explanation of the A
A is true, but R is false
Both A and R are true, and R is not the correct explanation of the A
A is false, but R is true
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