Q. Explain Fleming's left hand rule with the help of labelled diagram.

Q. Define autotrophic nutrition.

Q. What are biodegradable wastes?

Q. With the help a labelled diagram explain, construction and working of an electric generator (Dynamo).

Q. Write characteristics of an ideal fuel.

Q. What is an acid? Write some of the properties of acids.

Q. $6\Omega ,8\Omega$ and $10\Omega$ resistance are connected in series. Find total resistance of the circuit.

Q. Write a balanced chemical equation with the help of chemical symbols and formulas for the following reactions:

Q. Define malleability.

Q. What are dental caries? How are they caused?

Q. How is short sightedness (Myopia) caused? How it can be corrected? Explain with diagram.

Q. Write three chemical properties of Ethanol. Why is it used a fuel?

Q. What change occur among boys and girls during adolescence?

Q. Why is the depletion of the ozone layer a matter of concern for us? What steps have been taken to minimise it?

Q. Write chemical formula of Plaster of Paris (POP) and its advantages also.

Q. How do metallic character and valency of elements change in a period moving left to right in modern periodic table?

Q. Why is Sodium stored under kerosine?

Q. What are fossils?

Q. What is wind mill? Write its advantages.

Q. Define principle focus of a convex lens.

Q. What changes can you suggest to make your house eco-friendly?

Q. Draw a labelled diagram of internal structure of human heart.

Q. What do all acids and bases have in common?

Q. Draw the symbols for a Electric cell and wire crossing without joining.