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Chemistry Past Questions

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1196
Hardening of an oil may be achieved by?
  • A. boiling the oil with water
  • B. boiling the oil with a catalyst
  • C. treating the oil with sodium hydroxide
  • D. treating the oil with hydrogen and catalyst
  • E. distilling oil under reduced pressure
View Answer & Discuss (7) JAMB 1980
1197
Hardening of an oil may achieved by?
  • A. boiling the oil with water
  • B. boiling the oil with a catalyst
  • C. treating the oil with sodium hydroxide
  • D. treating the oil with hydrogen and catalyst
  • E. distilling oil under reduced pressure
View Answer & Discuss (4) JAMB 1980
1198

A cold aqueous solution of sodium chloride is electrolyzed using a graphite anode and an iron cathode. In the course of the electrolysis the electrolyte is continuously stirred. The liquid left after electrolysis will therefore consist of?

  • A. sodium hydroxide solution
  • B. chlorine water
  • C. pure water
  • D. sodium hypochlorite solution
  • E. hydrochloric acid solution
View Answer & Discuss (20) JAMB 1980
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1199

The best way of collecting chlorine is?

  • A. by downward displacement of air
  • B. by upward displacement of air
  • C. over water
  • D. under water
  • E. over mercury
View Answer & Discuss (17) JAMB 1980
1200
Cellulose and starches can be classified as one of the following?
  • A. sugars
  • B. sucrose
  • C. hydrocarbons
  • D. carbohydrates
  • E. isomers
View Answer & Discuss (2) JAMB 1980
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