Q.1.What is meant by exothermic process ? Give one example.
Q.2.What is meant by catalyst ?
Q.3. If a wire of resistance R, length / made of material of resistivity p is
cut into two equal parts, find
the resistivity and resistance of the two pieces.
Q.4. Define pH.
Q.5. Name two materials used in the manufacture of solar cells. What is the
efficiency of modern solar cells ?
Q.6. Out of the two fuels C4H10 and C4H9OH,
which one is expected to have a higher calorific value and why ?
Q.7. Draw the ray diagram to show how a convex lens behaves if object is
placed in between F & Pole.
OR
State Faraday's law of electrolysis.
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