Bhai, first learn that salt colour table by heart – green for iron, blue for copper, white for lead. Gas smell pakdo – sulfur dioxide meethi-boo jaise burnt hui match jaisi aati hai. Par yaad rakhna, practical exam mein tumhari Bunsen burner ki flame bhi sahi colour de paaye, uske liye air hole ka adjustment aana chahiye. Main yeh raat bhar rat raha hoon, kyunki kal mera paper hai aur pappa ke operation ke baad fees bharne ke liye scholarship chahiye.
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