Name the type of solution formed in the following cases:

i) 20g of NaCl in 100g of water.

ii) 36g of NaCl in 100g of water.

iii) 45g of NaCl in 100g of water at 80°C.

iv) Sulphur dissolved in CS₂

v) Nitrogen in the soil.

i) Unsaturated solution

Explanation: Solubility of NaCl at room temperature is 36g. It implies that 36g of NaCl is required to saturate 100g of water. But in this case we are adding only 20g and more of NaCl can be added. Thus it is an unsaturated solution.

ii) Saturated solution

Explanation: Solubility of NaCl at room temperature is 36g. It implies that 36g of NaCl is required to saturate 100g of water. So in this case we are adding 36g NaCl which is exactly the amount for saturated solution. Thus it is a saturated solution.

iii) Super-saturated solution

Explanation: A super saturated solution contains more solute than the saturated solution. In this case we have increased the temperature due to which the solubility increased. So more solute can be added. Thus it is a super-saturated solution.

iv) Non-aqueous solution

Explanation: A solution containing any liquid solvent other than water is called non-aqueous solution. In this case solvent is carbon disulphide (CS₂). Thus it is a non-aqueous solution.

v) Saturated solution

Explanation: Soil cannot store more nitrogen than it can hold and when no more solute can be added to a given amount of solvent then it is called saturated solution.