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1426

If the cost of electricity required to deposit 1 g of magnesium is N5.00, how much would it cost to deposit 10g of aluminium?

  • A. N 10.00
  • B. N27.00
  • C. N44.44
  • D. N66.67
  • E. N33.33
View Answer & Discuss (11) JAMB 1984
1427
Nitrogen can best be obtained from a mixture over oxygen and nitrogen by passing the mixture over
  • A. potassium hydroxide
  • B. heated gold
  • C. heated magnesium
  • D. heated phosphorus
  • E. calcium chloride
View Answer & Discuss (10) JAMB 1984
1428
Water is said to be 'hard' if it
  • A. easily forms ice
  • B. has to be warmed before sodium chloride dissolves in it
  • C. froms an insoluble scum with soap
  • D. contains nitrates
  • E. contains sodium ions
View Answer & Discuss JAMB 1984
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1429
Sodium hydroxide (NaOH) pellets are
  • A. deliquescent
  • B. hygroscopic
  • C. efflorescent
  • D. hydrated
  • E. fluorescent
View Answer & Discuss (1) JAMB 1984
1430
Alkanes
  • A. are all gases
  • B. have the general formula CnH2n + 2O
  • C. contain only carbon and hydrogen
  • D. are usually soluble in water
  • E. are usually active compounds
View Answer & Discuss (4) JAMB 1984
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