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Chemistry

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26. Natural rubber is a polymer derived from
 
  • A. isoprene
  • B. ethylene
  • C. propylene
  • D. butadiene
 
27. First atomic theory was proposed by
 
  • A. John Dalton
  • B. E.Rutherford
  • C. De Broglie
  • D. D.I.Mendeleef
 
 
28. Which substance is obtained by the hydrolysis of oil?
 
  • A. ethanol
  • B. glycol
  • C. acetic acid
  • D. glycerol
 
29. Washing soda is
 
  • A. sodium sulphite
  • B. sodium bicarbonate
  • C. sodiun carbonate
  • D. sodium biosulphite
 
30. Air contains maximum amount of
 
  • A. oxygen
  • B. nitrogen
  • C. hydrogen
  • D. carbon dioxide