a) two chlorides which are insoluble in water
b) two sulphates which are insoluble in water
c) two carbonates which are soluble in water
d) a non metallic sulphate soluble in water
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Solution
a) Mercurous chloride and silver chloride
b) Barium sulphate and calcium sulphate
c) Calcium carbonate and lead carbonate
d) Iodosyl sulphate, (IO)2SO4