Question

The pressure at an aqueous solution of 0.1M cane sugar is than that of pure water
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Answer 1

Explanation:

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

According to Raoults Law,

Relative lowering of vapour pressure is directly proportional to number of solute species present in solution i.e., vant hoff factor.

As KCl ion dissociates ⇒ more species ⇒ more lowering ⇒ Less vapour pressure.

So, assertion and reason both are correct and reason is correct explanation.

Answer 2

Answer:

The vapour pressure at an aqueous solution of 0.1M cane sugar is less than that of pure water.

Explanation:

Due to addition of non volatile solute the vapour pressure decreases.