Which of the following are soluble in water?

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Copper sulphate crystals

Salt

Sugar

All of these.

answer is D.

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Detailed Solution

Copper sulphate crystals, salt, and sugar are soluble in water.
Solubility is defined as the greatest amount of solute that may dissolve in a certain quantity of solvent at a given temperature. Salt, sugar, and coffee all dissolve in water. They are dissolvable. Warm or hot water typically dissolves them faster and better. Pepper and sand are insoluble; even hot water will not dissolve them. Sawdust and wheat flour are insoluble, but copper sulphate crystals, salt, and sugar are soluble.

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