Acids, Bases and Salts

Match the important chemicals given in Column (A) with the chemical formulae given in Column (B)
Column (A) Column (B)
(a) Plaster of Paris (i) Ca(OH)2
(b) Gypsum (ii) CaSO4.1/2 H2O
(c) Bleaching Powder (iii) CaSO4 .2H2O
(d) Slaked Lime (iv) CaOC12