The substance which does not expand on going from liquid state to solid state is A. Water B. Cast-iron C. Aluminium D. Type metal

The correct answer is: Water

Water is the only substance that expands when it freezes. This is because the molecules of water are arranged in a tetrahedral structure when they are in a liquid state. When water freezes, the molecules form a crystal structure that is less dense than the liquid state. This is why ice floats on water.

Cast-iron, aluminium, and type metal all

expand when they go from liquid to solid state. This is because the molecules in these substances are packed more closely together in the solid state than they are in the liquid state.

Water is a unique substance in many ways, and its expansion when it freezes is just one of its many properties that make it special.