Suppose that your teacher asks you to conduct a seminar on ozone depletion. Give any three harmful effects of ozone depletion that you would present in the seminar.

As a result of stratospheric pollution the ozone layer is destructed. Write a harmful effect of ozone layer depletion.

Assume that you are going to present a seminar on the topic "Hydrogen a versatile future fuel". Make a short write up to be used for your presentation.

In a science fair, a debate based on 'Position of Hydrogen in the periodic table" was condùcted. Imagine that you were a participant in the debate arguing for including hydrogen along with alkali metals. i. Write any three statements you would have made in the debate in order to establish your árgument. ii. If Raju was in the opposite side arguing for including hydrogen with halogens, how would he have countered your arguments?

In a seminar, if you are asked to present a paper on hydrogen economy, write any two points you are going to include in your paper.