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.

Write any two uses of hydrogen.

What do you understand by the term hydrogen economy?

Write any two qualities of hydrogen as a fuel .

During a seminar a student asked another student, "Can NaCl give flame test?" a) Write your answer.

Magnetic force cannot do any work Do you agree with this statement? Justify your answer.

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?

You are asked to plant ginger in your home. Which part of ginger will you plant? Name the type of reproduction.

If you jerk a piece of paper under a book quick enough, the book will not move. Why?