Q. What do you understand by fuel efficiency?

Q. Suggest separation technique(s) one would need to employ to separate Mercury and water.

Q. Define hygroscopic and capillary waters? Which is not available to plants and why?

Q. Give reason why an atom of an element is electrically neutral?

Q. The graph shows species area relationships. Answer the following: Name the naturalist who studied two kinds of relationship shown in the graph. Write the observation made by him

Q. What do you mean by archives?

Q. What is Badla?

Q. What is the north – south extent of India?

Q. What would you observe when Zinc is added to a solution of Iron(II) sulphate? Write chemical reaction that takes place.

Q. What is Gametogenesis ?