1. Name any
two malleable metals.
2. Write any
two examples of harmful radiations emitted by the nuclear wastes ?
3. Write equation for laboratory preparation of hydrogen gas .
4. When a wire of resistance R, length l is made into a circle, what is the
resistance between two points at the end of its diameter & along it’s
semicircle ?
5. How can we use solar energy to overcome energy crisis ?
6. Calculate pH of the solution when hydrogen ion concentration is 1.0 x 10
-6 M.
7. What
is a wind mill ? Give two advantages and disadvantages of wind mill.
