What are fuel cells? Write their advantage and de-merits .

What are fuel cells ? Write the electrode reactions of a fuel cell which uses the reaction of hydrogen with oxygen.

What is a wind mill ? Write two advantage and two limitations of using wind mills to generate electricity.

How does fuel cell operate

What is a good fuel ?

Discuss the working of hydrogen – oxygen fuel cell. What are the advantages of using this fuel cell?

What is cleistogamy ? Write one advantage and one disadvantage of it, to the plant.

What are stem cells? Write two applications of stem cells in medical treatment.

What are stem cells? Write two applications of stem cells in medical treatment

What are biopesticides? Mention their two advantages.