Which of the following substances is soluble in water?LiFPbCl2Au2(CO3)3ZnS

The solubility of a substance in water depends on whether it can form hydrogen bonds with the water molecules.

1. LiF (Lithium Fluoride): Lithium Fluoride is soluble in water. This is because it is a salt of a strong base (LiOH) and a strong acid (HF).

2. PbCl2 (Lead Chloride): Lead Chloride is slightly soluble in cold water, but its solubility increases in hot water. However, it is generally considered insoluble in water.

3. Au2(CO3)3 (Gold Carbonate): Gold Carbonate is insoluble in water. This is because it is a salt of a weak base (AuOH) and a weak acid (H2CO3).

4. ZnS (Zinc Sulfide): Zinc Sulfide is insoluble in water. This is because it is a salt of a strong base (Zn(OH)2) and a weak acid (H2S).

So, out of the given options, LiF is soluble in water.