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Chemistry Questions and Answers

General Science
145. Tobacco is preserved from drying out in
 
  • A. ethanol
  • B. glycerol
  • C. glycol
  • D. acetone
 
 
146. Cotton fibre is made up of
 
  • A. cellulose
  • B. minerals
  • C. lignin
  • D. protein
 
147. Copper sulphate solution conducts the current by
 
  • A. semi conduction
  • B. mixed conduction
  • C. ions
  • D. electrons
 
148. Which alloy contains nickel?
 
  • A. solder
  • B. brass
  • C. bronze
  • D. invar