iGCSE Chemistry 0620 Extended - 12.1 Experimental design- Exam Style Questions Paper 2- New Syllabus
▶️ Answer/Explanation
During filtration, the mixture is poured through filter paper. The solid (insoluble salt) cannot pass through and is caught in the filter paper — this is the residue (X). The liquid (aqueous salt solution) passes through the filter paper and collects in the flask below — this is the filtrate (Y). So X is the residue and Y is the filtrate.
✅ Answer: (D)
✅ Answer: (D)
▶️ Answer/Explanation
A saturated solution is defined as a solution that contains the maximum concentration of solute that can dissolve in the solvent at a specified temperature. Options (C) and (D) describe hydrocarbons, not solutions. Option (B) is incorrect — it should refer to solute, not solvent.
✅ Answer: (A)
✅ Answer: (A)
▶️ Answer/Explanation
A burette is a long, graduated glass tube with a tap at the end, designed to accurately measure variable volumes of liquid to the nearest \(0.1 \mathrm{cm}^3\). A volumetric pipette measures only one fixed volume (e.g., \(25.0 \mathrm{cm}^3\)). A conical flask or a graduated cylinder cannot measure with that level of precision.
✅ Answer: (B)
✅ Answer: (B)