Question

13. Name any three secondary products obtained after, refining crude oil.
14. Give one example each of renewable and non-renewable resource.
15. Name the alloy used to make surgical instruments.

Section -B

16. Why petroleum products are said to be exhaustible resources?
17. How coal is produced?
18. What is reactivity series of metals? Give the arrangement of metals
in reactivity series.
19. Why do we consider petroleum as black gold?
20. Define malleability and ductility. Give one example for each.

Section -C

21.Give reasons-
a. Why are bells made of metals and not from wood?

b. Why electric wires are not made up of silver although it is the best
conductor of electricity?
c. Why are noble metals used to make ornaments?
22. Explain destructive distillation of coal with neat labelled diagram.
Name the different products produced during destructive distillation
of coal.
23. List five things you can do to help in preventing an energy crisis.
24. Explain refining of petroleum with a neat labelled diagram of
fractional distillation column.
25. a. What is an alloy?
b. Give two examples of alloys?
c. How are alloys generally made?
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Answer 1

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Answer 2

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