AgCl
CaSO4
Na2CO3
PbCl2
Explanation
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Discussions (13)

The correct answer is CaSO4 according to new school chemistry..
All chlorides are soluble salt except lead, silver.
All tetraoxosuplates salts are soluble except lead, barium and calcium (which is slightly soluble)
All sodium, potassium and ammonium salts are soluble.. According to new school chemistry thank you.

, except Na2CO3, it is very soluble in water, only CaSO4 is sparingly soluble in water

All salts of silver chloride and lead are insoluble in water...all salts of tetraoxosulphate are insoluble in water,with exceptions....

The answer is B
Calcium tetraoxosulphate (VI) is only slightly soluble in water.
Ref New school Chem , chapter 6 Acids. Bases salt

Na2+ is a group 1 element making it very soluble in water and C03'-2 is insoluble unless cobined with a group 1 element so the answer is NaCO3





