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Chemistry

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11. Which one of the following does not contain silver?
 
  • A. Horn silver
  • B. Ruby silver
  • C. German silver
  • D. Lunar caustic
 
12. Nail polish remover contains
 
  • A. acetone
  • B. benzene
  • C. acetic acid
  • D. petroleum ether
 
 
13. What is a mixture of potassium nitrate powdered charcoal and sulphur called?
 
  • A. paint
  • B. glass
  • C. gun powder
  • D. cement
 
14. Which is the heaviest metal?
 
  • A. iron
  • B. mercury
  • C. nickel
  • D. osmium
 
15. Bleaching action of chlorine is by
 
  • A. oxidation
  • B. reduction
  • C. decomposition
  • D. hydrolysis