AP EAPCET 05-Jul-2022 Shift 2 Paper

Isotonic solutions are the solutions that have same concentration' of water and solutes. Cells placed in isotonic solutions will never shrink or swell.
(A) Strength of 18g∕L glucose =‌

18

180

=‌

1

10

Strength of 6g∕L urea =‌

6

60

=‌

1

10

∴18g∕L glucose is isotonic with 6g∕L urea.
(B) Strength of 10g∕L glucose =‌

10

180

Strength of 10g∕L urea =‌

10

60

(C) The van't Hoff factor for NaOH=2. Due to 2 ions are produced, Na+and OH−. So strength of NaOH=2×0.01=0.02M Strength of glucose =0.02M Therefore, (A) and (C) are isotonic solutions.