Mention three areas in which `H_2SO_4` plays an important role.

Name the element which plays an important role in opening and closing of stomata.

Indicate whether the following statements are true or false : Henle’s loop plays an important role in concentrating the urine.

Electromagnetic radiations with wavelength: gamma_3 play an important role in maintaining the earth's warmth. Name the part of electromagnetic spectrum to which these radiations belong.

Give an example of a reaction in which H_2SO_4 behaves as : a strong acid.

Give an example of a reaction in which H_2SO_4 behaves as : an oxidising agent.

Give an example of a reaction in which H_2SO_4 behaves as : a dehydrating agent.

FeS + H_2SO_4 rarr