EXTRA QUESTIONS
1. Name any two products obtained from petroleum.
2. (a) Which type of plastics can be used to make microwave-safe containers? Give two examples.
(b) Write any two characteristics of polycot.
3.Give reason for the following statements.
(a) A chemical which emits odour is generally added to natural gas before supplying it to homes and factories.
(b) Unlike on earth, the rocks do not get broken down on the moon.
4. (a) Sanjay has arranged two plane mirrors at an angle of 60°. Find the number of images formed.
(b) What is reflex arc?
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