c
weight of wood charcoal \(=0.6\, g\)

Mass of acetic acid adsorbed \(=\frac{ M _{1} V _{1}- M _{2} V _{2}}{1000} \times 60\)

\(=\frac{0.2 \times 200-0.1 \times 200}{1000} \times 60\)

\(=1.2 \,g\)

Mass of acetic acid adsorbed per gram of carbon \(=\frac{1.2}{0.6}=2\)