UPSC CSE Prelims 1998 Q126 — Science & Technology PYQ with Answer

Match List I with List II

and select the correct answer using the codes given below the lists:

List I

I. Blue vitriol

II. Epsom salt

III. Baking soda

IV. Caustic soda

List II

A) Sodium bicarbonate B) Sodium hydroxide C) Magnesium sulphate D) Copper sulphate