Question

(i) Colourless diamond (ii) Black diamond (iii) Graphite (iv) Wood charcoal (v) Bone charcoal (vi) Lampblack (a) lubricant (b) gas mask (c) rock drilling (d) jewellery (e) printer's ink (f) refining sugar B (match the columns)
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Answer 1

Answer:

Diamond is not V. Match the items mentioned in column with the uses given in column II: Column I Column II 1. Colourless diamond (a) Lubricant Black diamond (b) Gas mask 3. Graphite (c) Rock drilling 4. Wood charcoal (d) Jewellery 5. Bone charcoal Printer's ink 6. Lampblack (soot) (f) Refining sugar