Sugar crystals do not dissolve easily in ice cold water. Explain.

Sugar does not dissolve in water.

Many ionic crystals dissolve in water because

NaCl dissolves in water but not in benzene. Explain.

Account for the following : (a) When sugar crystals dissolve in water, the level of water does not rise appreciable. (b) Dogs generally hang out their tongue in summer.

Sugar dissolves in water because

The materials that do not dissolve in water are ………………… in water.