IGCSE chem need help??

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hello guyz.... i wanted to know about chromatography process... like what question can cme related to this ? and is the finding of RF value in syllabus ?? secondly what r the test related to oxidation, reduction pottasium dichromate, pottasium permanganate and their colours like green to what and purple...??? (confused) :Search: :unknown: :%)
 
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