1. First atomic theory was proposed by
John Dalton
2. The alloy of aluminium used for making magnet is
alnico
3. Which one of the following is an element?
diamond
4. Nucleus of an atom contains
protons and neutrons
5. Rare gases are
di atomic
6. Which synthetic fibre is known as artificial silk?
Rayon
7. Bleaching powder contains
chlorine
8. DDT is an
insecticide
9. Water drops are spherical because of
surface tension
10. Which one of the following is also called Stranger Gas?
Xenon
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