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Chemistry Questions and Answers

General Science
197. Which of the following is a mixture?
 
  • A. gun powder
  • B. iron sulphate
  • C. dry ice
  • D. brass
 
 
198. Which of the following is the source of common salt?
 
  • A. bauxite
  • B. halite
  • C. pyrite
  • D. calcite
 
199. The chemical name of laughing gas is
 
  • A. nitrous oxide
  • B. nitrogen dioxide
  • C. nitrogen peroxide
  • D. nitric oxide
 
200. Which one of the following chemicals is used in Beauty Parlours for hair setting?
 
  • A. iron based
  • B. phosphorus based
  • C. silicon based
  • D. sulphur based