The mixtures consist of the combination of 2 or more substances, containing a solute (it is in lesser proportion) and a solvent (in greater proportion). An example of a gas-liquid mixture can be soft drinks (e.g. Coca Cola), beer, the foam of a shampoo.
37.8 grams of CS2 equals to 37.8/76=0.5 mole. So the products have 0.5 mole CO2 which is 11.2 liters at STP. So according to the gas law, the volume at given condition is 12.4 liters. So the answer should be 12.2 liters.