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16

Which of the following is a general method of preparing acids?

  • A. Direct combination of constituent elements
  • B. Reaction between a base and an amphoteric oxide
  • C. Double decomposition involving a salt solution
  • D. Reaction between an anhydride and water
  • E. Dissolution of hydroxides followed by neutralization
View Answer & Discuss (6) WAEC 1997
17

Which of the following compounds reacts with sodium hydroxide to form a salt?

  • A. CH 3CH 2COOH
  • B. (CH3) 3COH
  • C. CH3CH=CH 2
  • D. C 6H 12O 6
View Answer & Discuss (1) WAEC 1999
18

A substance is said to be hygroscopic if it absorbs?

  • A. water from the atmosphere to form a solution
  • B. heat from the surrounding
  • C. carbon (IV) oxide from the atmosphere
  • D. moisture from the atmosphere without dissolving
View Answer & Discuss (7) WAEC 2001
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
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19

Which of following acids forms normal salts only?

  • A. Tetraoxosulphate (VI) acid
  • B. Trioxosulphate (IV) acid
  • C. Acetic acid
  • D. Tetraoxophosphate (V) acid
View Answer & Discuss (11) WAEC 2002
20

The basic property of salts used as drying agents is by?

  • A. efforescence
  • B. high melting point
  • C. hygroscopy
  • D. low solubility
View Answer & Discuss (8) WAEC 2021
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208