Assertion (A) > : Synthetic detergents can lather well in hard water. Reason (R) > : Synthetic detergents form soluble calcium and magnesium salts with hard water.

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Q: 145 (IAS/2002)

Assertion (A) : Synthetic detergents can lather well in hard water.
Reason (R) : Synthetic detergents form soluble calcium and magnesium salts with hard water.

question_subject: 

Science

question_exam: 

IAS

stats: 

0,30,20,30,4,4,12

keywords: 

{'synthetic detergents': [0, 0, 1, 0], 'hard water': [0, 0, 0, 2], 'soluble calcium': [0, 0, 1, 0], 'magnesium salts': [0, 0, 2, 1]}

Option 1 states that both A and R are individually true, and the reason is the correct explanation of the assertion. This is the correct answer because synthetic detergents can indeed lather well in hard water due to their ability to form soluble salts with the calcium and magnesium ions present in hard water.

Option 2 is incorrect because the Reason R is the correct explanation for Assertion A.

Option 3 is also incorrect. While the assertion is true, the reason given in R is also true, not false.

Option 4 is incorrect because both the assertion and reason are true, not just the reason. The assertion is not false as indicated in Option 4.