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.
Which piece of equipment is used to place a hot crucible on while it cools?
A.Wire gauze
B.Heat-proof mat
C.Filter paper
D.Glass slide
- 2.
What is the function of the 'meniscus' when measuring liquids?
A.It is a type of glassware
B.It is the curved upper surface of a liquid column
C.It is a cleaning tool
D.It is a chemical indicator
- 3.
Which instrument would you use to measure exactly for a reaction to change color?
A.Clock
B.Stopwatch
C.Wristwatch
D.Metronome
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.
Why is chromatography paper often dried before being sprayed with a locating agent?
A.To make the paper easier to handle
B.To prevent the locating agent from reacting with the solvent
C.To ensure the value doesn't change
D.Locating agents only work on wet paper
- 2.
If a substance has an value of 0.8, where is it located on the chromatogram?
A.Near the baseline
B.Near the solvent front
C.Exactly in the middle
D.It has not moved at all
- 3.
Which of these is a qualitative use of chromatography?
A.Determining the exact mass of a component
B.Identifying the presence of a specific dye in a food sample
C.Measuring the total volume of a mixture
D.Calculating the percentage yield of a reaction
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 finds that a sample of sulfur melts between and . What does this indicate about the sample?
A.The sample is pure
B.The sample is a single element
C.The sample is impure
D.The thermometer is broken
- 2.
Which property allows centrifugation to separate a mixture?
A.Differences in boiling points
B.Differences in magnetic susceptibility
C.Differences in densities of the components
D.Differences in chemical reactivity
- 3.
To obtain pure water from seawater, which process is most suitable?
A.Filtration
B.Simple distillation
C.Crystallization
D.Magnetic separation
Download the worksheet for Experimental Techniques and Chemical Analysis - Separation and purification to practice offline. It includes additional chapter-level practice questions.