Q.

Which of the following is not soluble in water?

A. Lead Sulphate
B. Zinc sulphate
C. Potassium sulphate
D. Sodium sulphate
Answer» B. Zinc sulphate
Explanation: Lead sulfate (PbSO4) is a white crystalline solid. It is insoluble in water and sinks in it. It is often seen in the plates/electrodes of car batteries, as it is formed when the battery is discharged. It is also known as fast white, milk white, sulfuric acid lead salt or anglesite.
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