Qualitative Analysis

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1	Which of the following gases can not turn acidified dichromate from orange to green? double click for video show
		carbon dioxide
		sulphur dioxide
		ethene
		methanol vapour


2	Which of the following gases does not turn limewater milky? double click for video presentation
		carbon dioxide
		sulphur dioxide
		sulphur trioxide
		carbon monoxide


3	Which of the following will be formed when excess carbon dioxide is passed through lime water? double click for video presentation
		Calcium carbonate
		Calcium hydroxide
		Calcium hydrogencarbonate
		Calcium oxide


4	Which of the following does not decolourise bromine water? double click for video presentation
		But-1-ene
		Sodium sulphite solution
		Sodium sulphate solution
		Ethene


5	Starch KI paper turns blue with chlorine gas. double click for video presentation Which of the following reactions does not happen?
		Oxidation number of chlorine changes from 0 to +1.
		Iodide is oxidised.
		Iodine forms a blue complex with starch.
		Chlorine is reduced.