Explain what is observed :- when a beam of light is passed through a colloidal sol.

Explain what is observed when abeam of light is passed through colloidal solution of arsenious sulphide? Give the name of the phenomenon also.

Explain what is observed :- electric current is passed through a colloidal sol?

Explain what is observed :- an electrolyte, NaCl is added to hydrated ferric oxide sol.

What will happen when carbon dioxide is passed through calcium hydroxide.

What happens when a strong current is passed through a semiconductor? Explain.

Explain how a parallel beam of light on refraction through a concave lens gets diverged.

Expain why white light is dispersed when passing through a prism.