Question

Which radiations of sun can be harmful to Earth?
(a) IR
(6) UV
(c) Both (a) and (b) (d) Sunlight
8. Malachite is an ore of
(a) Iron
(6) Copper
(c) Mercury (d) Zinc
9. Excessive exposure of which of the following rays result in damage to immune system in living organism
(a) IR
(6) UV
(c) Microwave (d) Both (@) and (b)​

Answer 1

Answer:

7) both a and b

8) copper

9)both a and b

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