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Chemistry

6. Which synthetic fibre is known as artificial silk?
 
  • A. Nylon
  • B. Rayon
  • C. Cotton
  • D. Terylene
 
7. Which variety of glass is heat resistant?
 
  • A. bottle glass
  • B. flint glass
  • C. hard glass
  • D. pyrex glass
 
 
8. The chemical used as a fixer in photography is
 
  • A. sodium sulphate
  • B. borax
  • C. sodium thiosulphate
  • D. ammonium sulphate
 
9. Which one of the following is the softest?
 
  • A. sodium
  • B. iron
  • C. aluminium
  • D. lithium
 
10. Which one of the following is an element?
 
  • A. ruby
  • B. topaz
  • C. sapphire
  • D. diamond