A `1.17%` solution of `NaCl` is isotonic with `7.2%` solution of glucose. Calculate the Van't Hoff factor of `NaCl`.

Options

A. 2
B. 4
C. 5
D. 6

Answer

A

Explanation

For isotonic solution, osmotic pressure should be same.
`therefore pi_((NaCl))=pi_(("glucose")) " " iC_(1)RT=C_(2)RT`
`iC_(1)=C_(2)`
`i((1.17//58.5)/(V))=(7.2//180)/(V)rArr i=(7.2xx58.5)/(1.17xx180)=2`