Experimental Techniques and Chemical Analysis
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Measurement and apparatus
SubtopicMeasurement and apparatus under Experimental Techniques and Chemical Analysis for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
Based on the provided separation diagram, which label correctly identifies the substance that passes through the filter paper and is collected in the beaker?
A.Residue
B.Filtrate
C.Solvent
D.Solute
- 2.
A student is conducting an experiment that produces a gas. Which apparatus should be used to collect and measure the volume of this gas accurately?
A.Gas syringe
B.Thistle funnel
C.Condenser
D.Buchner funnel
- 3.
What is the standard SI unit for measuring the concentration of a chemical solution in a laboratory environment?
A.B.C.D.
Download the worksheet for Experimental Techniques and Chemical Analysis - Measurement and apparatus to practice offline. It includes additional chapter-level practice questions.
Chromatography
SubtopicChromatography under Experimental Techniques and Chemical Analysis for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
The value (retention factor) of a substance is a ratio used to identify compounds. How is it calculated?
A.Distance moved by solvent / Distance moved by substance
B.Distance moved by substance / Distance from top of paper to baseline
C.Distance moved by substance / Distance moved by solvent front
D.Total length of paper / Distance moved by substance
- 2.
A student performs chromatography on a sample of black ink. After the experiment, the chromatogram shows three distinct spots at different heights. What can be concluded about the ink?
A.The ink is a pure substance.
B.The ink is a mixture of at least three different dyes.
C.The ink is insoluble in the solvent used.
D.The ink has a boiling point lower than the solvent.
- 3.
The diagram below shows a chromatography setup for separating a mixture of dyes. Which part represents the mobile phase?
A.The lid covering the beaker
B.The chromatography paper
C.The solvent
D.The pencil baseline
Download the worksheet for Experimental Techniques and Chemical Analysis - Chromatography to practice offline. It includes additional chapter-level practice questions.
Separation and purification
SubtopicSeparation and purification under Experimental Techniques and Chemical Analysis for Grade 12 IGCSE.
Preview questions (no answers)
- 1.
A student wants to verify if a colorless liquid sample is pure water. Which of the following methods provides the most reliable evidence of its purity?
A.Checking if the liquid turns anhydrous copper(II) sulfate blue
B.Measuring the pH using universal indicator
C.Observing if the liquid is clear and odorless
D.Measuring the boiling point to see if it is exactly
- 2.
Where should the bulb of the thermometer be positioned during a simple distillation to ensure the temperature of the vapor is measured correctly?
A.Level with the side-arm of the distillation head
B.Completely submerged in the boiling liquid
C.At the very bottom of the round-bottom flask
D.Inside the condenser tube
- 3.
In a simple distillation apparatus, what is the primary function of the water-cooled condenser?
A.To increase the boiling point of the liquid mixture
B.To filter out solid impurities from the vapor
C.To cool the vapor so that it changes back into a liquid
D.To provide a large surface area for chemical reactions
Download the worksheet for Experimental Techniques and Chemical Analysis - Separation and purification to practice offline. It includes additional chapter-level practice questions.