Name the reactions taking place in the presence of sunlight.

State whether the following statement is true or false. In methane, all the hydrogen atoms can be replaced by chlorine atoms when the reaction takes place in presence of sunlight.

What is active alpha hydrogen atom ? Name one reaction that takes place due to the presence of such a hydrogen.

Light reaction takes place in the presence of light energy in ________ membranes of the chloroplasts.

Halogenation of alkanes in the presence of sunlight is