Q. The Earth can support life. Give reasons.

Q. What is a transparent medium ? Give two examples.

Q. Write a note on- (a) Dow process (b) Raschig process (c) Kolbe’s reaction (d) Reimer-Tiemann reaction

Q. How many tangents can be drawn to a circle from a point on the same circle? Justify your answer.

Q. Which is more metallic: sodium or aluminium?

Q. Is the uniform circular motion accelerated ? Give reasons for your answer

Q. Difference between physical adsorption and chemical adsorption.

Q. What are the different ways of increasing production on the same piece of land?

Q. Define age structure, death rate, and birth rate.

Q. State whether the following statements are true or false. Give reasons for your answer. The nature of Constitution is seen as a living document.