b
Osmotic pressure \(=\pi= i \times C \times RT\)

For \(NaCl i =2\) so

\(\pi_{ NaCl }= i \times C _{ NaCl } \times RT \quad C _{ NaCl }=\) conc. of \(NaCl\)

\(0.1=2 \times C _{ NaCl } \times RT\)

\(C_{ NaCl }=\frac{0.05}{ RT } \quad C_{\text {glucose }}=\) conc. of glucose

For glucose \(i=1\) so

\(\pi_{\text {Glucose }}= i \times C _{\text {glucose }} \times RT\)

\(0.2=1 \times C _{\text {glucose }} \times RT\)

\(C _{\text {Glucose }}=\frac{0.2}{ RT } \quad \eta_{ NaCl }=\) No. of moles \(NaCl\)

\(\eta_{ NaCl }\) in \(1 L = C _{ NaCl } \times V _{\text {Litre }}\)

\(=\frac{0.05}{ RT } \quad \eta_{ glucose }=\) No. of moles glucose

\(\eta_{\text {glucose }}\) in \(2 L = C _{\text {glucose }} \times V _{\text {Litre }}\)

\(=\frac{0.4}{ RT }\)

\(V _{\text {Total }}=1+2=3 L\)

so Final conc. \(NaCl =\frac{0.05}{3 RT }\)

Final conc. glucose \(=\frac{0.4}{3 RT }\)

\(\pi_{\text {Total }}=\pi_{ NaCl }+\pi_{\text {glucose }}\)

\(=\left[i \times C_{ NaCl }+C_{\text {glucose }}\right] \times RT\)

\(=\left(\frac{2 \times 0.05}{3 RT }+\frac{0.4}{3 RT }\right) \times RT\)

\(=\frac{0.5}{3} atm\)

\(=0.1666 atm\)

\(=166.6 \times 10^{-3} atm\)

\(\Rightarrow 167.00 \times 10^{-3} atm\)

so \(x=167.00\)