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Chemistry WAEC Past Questions

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1271

The IUPAC name for the compound \(ClCH_{2}CH_{2}OH\) is

  • A. 1- chloropropanol
  • B. 2-chloropropanol
  • C. 1-chloroethanol
  • D. 2-chloroethanol
View Answer & Discuss (7) WAEC 2017
1272

The real harmful effect of the release of chlorofluorocarbons into the atmosphere is that it eventually causes

  • A. excessive ultraviolet light from the sun to reach the earth surface
  • B. excessive release of infrared light from the sun to the earth surface
  • C. corrosive effect of the chemicals on humans and animals
  • D. acidic effect of chemicals on humans
View Answer & Discuss (2) WAEC 2017
1273

A primary alkanol has a molecular mass of 60. What is the structural formula of the compound? [C= 12.0, H= 1.0, O= 16.0)

 



 

  • A. A
  • B. B
  • C. C
  • D. D
View Answer & Discuss (5) WAEC 2017
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1274

Petroleum is a non-renewable source of energy because it

  • A. is formed naturally
  • B. is cheap
  • C. can be recycled after use
  • D. cannot be regenerated once used up
View Answer & Discuss WAEC 2017
1275

(a)(i) Sketch a graphical representation of Charles' law.

(ii) Calculate the volume of oxygen that would be required for the complete combustion of 2.5 moles of ethanol at s.t.p. [molar volume at s.t.p. = 22.4 dm\(^3\)]

(b)(i) State the collision theory of reaction rates.

(ii) Using the collision theory, explain briefly how temperature can affect the rate of a chemical reaction.

(c)(i) Define esterification.

(ii) Give two uses of alkanoates.

(iii) Give the products of the alkaline hydrolysis of ethyl ethanoate.

 

(d) A tin coated plate and a galvanized plate were exposed for the same length of time.

(i) Which of the two plates corrodes faster

(ii) Explain briefly your answer in 2(d)(i)

View Answer & Discuss (8) WAEC 2018
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