The charcoal used to decolourise brown sugar solution is
1). Wood charcoal
2). Coconut charcoal
3). Animal charcoal
4). Sugar charcoal
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2. Question 7.4:Why does NH3 form hydrogen bond but PH3 does not?
4. The chemical that is used to ripen mangoes is
7. The cathode of a lead storage battery is made up of
8. An important green-house gas other than methane being produced from the agricultural fields is
9. Question 1.11:Name the parameters that characterize a unit cell.