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Chemistry

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31. The alcohol used in the preparation of dynamite is
 
  • A. ethyl alcohol
  • B. glycerol
  • C. glycol
  • D. methyl alcohol
 
32. The element used in lead pencils is
 
  • A. zinc
  • B. lead
  • C. carbon
  • D. tin
 
 
33. Epsom salt is chemically known as
 
  • A. copper sulphate
  • B. magnesium sulphate
  • C. ferrous sulphate
  • D. copper sulphate
 
34. Calcium sulphate is known as
 
  • A. epsom salt
  • B. gypsum salt
  • C. blue vitriol
  • D. potash alum
 
35. Oil of vitriol is
 
  • A. nitric acid
  • B. hydrochloric acid
  • C. phosphoric acid
  • D. sulphuric acid