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Chemistry 1985 JAMB Past Questions

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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
NECO offline past questions - All questions, answers & explanations in one app 25712
26
Which of the following roles does sodium chloride play in soap preparation? It
  • A. reacts with glycerol
  • B. purifies the soap
  • C. accelerates the decomposition of the fat or oil
  • D. separates the soap from the glycerol
  • E. converts the fatty acid to its sodium salt
View Answer & Discuss (1) JAMB 1985
27
The function of sulphur during vulcanization rubber is to?
  • A. act as catalyst for the polymerization of rubber molecules
  • B. convert rubber from thermosetting to thermo plastics polymer
  • C. from chains which bind rubber molecules together
  • D. break down rubber polyer
  • E. shorten the chain length of rubber polyer
View Answer & Discuss (3) JAMB 1985
28
Figure 1 above shows part of the periodic Table which of the elements belongs to the p-block?
  • A. S, T and U
  • B. V, W and X
  • C. S and T only
  • D. P, Q and R
  • E. V, W, X and S
View Answer & Discuss (1) JAMB 1985
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29

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. At room temperature (300 K)

  • A. Y is twice as soluble as X
  • B. X is twice as soluble as Y
  • C. X and Y are soluble to the same extent
  • D. X is three times as soluble as Y
  • E. Y is three times as soluble as X
View Answer & Discuss (3) JAMB 1985
30

The diagram shown above represents the solubility curves of two salts, X and Y, in water, use this diagram to answer the question. If 80 g each of X and Y are taken up in 100 g of water at 353 K we shall have

  • A. only 10g of X undissolved
  • B. only 16 g of Y undissolved
  • C. 10 g of X and 16 g of Y undissolved
  • D. all X and Y dissolved
  • E. all X and Y undissolved
View Answer & Discuss (2) JAMB 1985
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts