Why is water considered a 'universal solvent'?

Name the principles involved in the following separation methods.

Winnowing

Name the principles involved in the following separation methods.

Separating funnel

Name the principle involved in the following separation method.

Fractional distillation

Alok added one spoonful of glucose powder in each of the following and stirred:

 (i) A glassful of cold water

(ii) A glassful of water at room temperature

(iii) A glassful of warm water

In which case, glucose dissolves first and why? Can Alok separate the glucose powder from water? How? Explain.