NDA General Ability Question (2025) — Solution

Step-by-step solution

Sulphur is a non-polar solid and carbon disulphide (CS_2) is a non-polar solvent. According to the principle of like dissolves like, sulphur dissolves completely in carbon disulphide to form a true solution. A true solution is a homogeneous mixture, not a heterogeneous mixture. Mixture of sugar and salt crystals, sandy water, and sulphur in water do not form true solutions and are heterogeneous mixtures. Answer: Sulphur in carbon disulphide