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2976
Clothes should be properly rinsed with water after bleaching because
  • A. the bleach decolourizes the clothes
  • B. chlorine reacts with fabrics during bleaching
  • C. the clothes are sterilized during bleaching
  • D. hydrogen chloride solution is produced during bleaching
View Answer & Discuss (3) JAMB 1994
2977

When sodium ethanoate is treated with a few drops of concentrated tetraoxosulphate(vi)acid. one of the products is

  • A. CH3COOH
  • B. CH3COOCH3
  • C. CH3COOC2H5
  • D. C2H5COOCH3
View Answer & Discuss (6) JAMB 1994
2978

From the above diagram, the caustic soda in the conical flask serves to

  • A. dry ethene gas
  • B. remove carbon (iv) oxides from ethene
  • C. remove carbon (ii) oxide from ethene
  • D. remove sulphur (iv) oxide from ethene
View Answer & Discuss (11) JAMB 1994
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2979

The dissolution of common salt in water is a physical change because

  • A. the salt can be obtained by crystallization
  • B. the salt can be recovered by the evaporation of water
  • C. heat is not generated during mixing
  • D. the solution will not boil at 100oC
View Answer & Discuss (11) JAMB 1993
2980
At 25oC and 1atm, a gas occupies a volume of 1.50dm3. What volume will it occupy at 100oC and 1atm?
  • A. 1.88 dm3
  • B. 6.00 dm3
  • C. 18.80 dm3
  • D. 18.80 dm3
  • E. 60.00dm3
View Answer & Discuss (6) JAMB 1993
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