Question

Which of the following pairs of solutions is isotonic?

• A. $6\%$ urea and $6\%$ glucose $\left(w/v\right)$
• B. $18\%$ urea and $18\%$ glucose $\left(w/v\right)$
• C. $6\%$ urea and $18\%$ fructose $\left(w/v\right)$
• D. $34.2\%$ sucrose and $60\%$ glucose $\left(w/v\right)$

Answer 1

The correct option is A $6\%$ urea and $6\%$ glucose $\left(w/v\right)$

The molarity of given data is 60% of urea solution and which is equals to 0.1M.

By using the formula

$M=\frac{10x}{Mol.Wt}$

Where X=given percentage

$M=\frac{0.6\times 10}{60}$

Therefore the 6% Glucose and 6%urea is isotonic.