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Question: Answered & Verified by Expert
A $0.6 \%$ solution for urea (molecular mass $=60)$ would be isotonic with
ChemistrySolutionsAP EAMCETAP EAMCET 2021 (23 Aug Shift 2)
Options:
  • A $0.1 \mathrm{M}$ glucose solution
  • B $0.6 \%$ solution of glucose
  • C $0.1 \mathrm{M} \mathrm{KCl}$ solution
  • D $0.6 \% \mathrm{KCl}$ solution
Solution:
1536 Upvotes Verified Answer
The correct answer is: $0.1 \mathrm{M}$ glucose solution
Molarity of $0.6 \%$ solution $=\frac{0.6}{60} \times \frac{1000}{100}=0.1 \mathrm{M}$
From, the options, we know that $\mathrm{KCl}$ will dissociate as it ionic. Therefore, option (c) and (d) are incorrect.
And, molarity of $0.6 \%$ glucose $=\frac{0.6}{180} \times \frac{1000}{100}=0.3 \mathrm{M}$
So, $0.6 \%$ solution of urea is isotonic with $0.1 \mathrm{M}$ glucose solution.

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