A spot moves cm and the solvent front cm. Calculate .
Salam Academy Original Practice · Proposed mark scheme
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12 questions
The baseline in chromatography is drawn in pencil because
Salam Academy Original Practice · Proposed mark scheme
A pure substance produces
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The beaker is covered during chromatography to
Salam Academy Original Practice · Proposed mark scheme
The solvent level must be below the baseline so that
Salam Academy Original Practice · Proposed mark scheme
The solvent front is cm from the baseline. A dye has . How far, in cm, did the dye move?
Salam Academy Original Practice · Proposed mark scheme
An value of must be wrong because
Salam Academy Original Practice · Proposed mark scheme
A locating agent is used to
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Unknown ink X gives spots at the same heights as dyes P and Q. X contains
Salam Academy Original Practice · Proposed mark scheme
A spot that stays on the baseline is
Salam Academy Original Practice · Proposed mark scheme
A spot moves cm; the solvent front moves cm. Calculate .
Salam Academy Original Practice · Proposed mark scheme
Two substances have the same in one solvent but different values in a second solvent. This shows they are
Salam Academy Original Practice · Proposed mark scheme