Class 12 Chemistry · Chapter 12 · Test 1
Paper and TLC Chromatography
40 MCQs
40 questions · 35 min · 40 marks
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Sample questions
The first 5 of 40. Try each one, then tap to see the answer.
Question 1
Chromatography is used to separate the components of a complex mixture based on their:
- AColours only
- BVarying affinities for two different phases
- CBoiling points only
- DDensities only
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Answer: B
Components differ in how strongly they are attracted to the stationary phase and the mobile phase.
Question 2
Adsorption is a surface phenomenon in which particles accumulate:
- AOnly on the outer surface
- BThroughout the bulk
- CInside the pores only
- DIn solution only
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Answer: A
Particles gather on the surface rather than entering the bulk of the material.
Question 3
Activated charcoal is used in filters because it adsorbs:
- AOnly metals
- BOnly liquids
- CGases and impurities onto its surface
- DOnly salts
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Answer: C
Its large surface collects gases and impurities.
Question 4
Which are the three important types of chromatography discussed here?
- APaper and column and ion exchange
- BTLC and HPLC and GC
- CPaper and gel and affinity
- DPaper and thin layer and gas chromatography
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Answer: D
The chapter covers paper chromatography and TLC and GC.
Question 5
In chromatography the stationary phase is the phase that:
- ADoes not move
- BMoves up the paper
- CIs always a gas
- DIs the sample
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Answer: A
The mobile phase carries the components past the fixed stationary phase.
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