Match column-I(gas evolved ) with column– II(characterisation) and select CORRECT code for your answer.

	List I		List II
i)	Gas evolved by the action of  dilute $H_{2}S{O}_4$ on a sulphite	p)	turns acidified $KMn{O}_4$ colourless
ii)	Gas evolved by the action of dilute $H_{2}S{O}_4$ on a Carbonate	q)	turns acidified dichromate solution green
iii)	Gas evolved by heating an ammonium salt with $NaOH$	r)	Nessler’s reagent gives a brown precipitate
iv)	Gas evolved by the action of dilute $H_{2}S{O}_4$ on a Sulphide	s)	turns Baryta water milky
		t)	turns Alkaline solution of Sodium nitro prusside purple