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WorksheetsAcids and Bases Post Quiz
Total questions: 10
Worksheet time: 8mins
Which of the following statements about alkalis is not true?
Alkalis turn red litmus paper blue.
Alkalis are good conductors of electricity.
Alkalis can be formed from oxides of non-metals when they are dissolved in water.
Alkalis dissolve in water forming hydroxide ions.
Which ionic equation represents the neutralisation of aqueous sodium hydroxide with dilute nitric acid?
NaOH + H+ -> Na+ + H2O
Na+ + NO3- -> NaNO3
H+ + OH- -> H2O
Na+ + HNO3 -> NaNO3 + H+
What could be the pH of a solution containing a weak acid?
1
4
7
10
Which substance reacts with hydrochloric acid to produce hydrogen?
Calcium oxide
Copper
Magnesium
Sodium hydroxide
Which of the following compounds dissolves in water to give a solution with pH greater than 7?
Calcium carbonate
Copper(II) hydroxide
Silver carbonate
Sodium hydroxide
The word equation shows a chemical reaction.
Substance S + nitric acid -> carbon dioxide + salt + water
What could substance S be?
Iron
Potassium carbonate
Magnesium oxide
Sodium hydroxide
An insect sting is alkaline. Which common substance could be used to neutralize the insect sting?
Damp washing soda (pH 10)
Damp salt (pH 7)
Liquid floor cleaner (pH 11)
Vinegar (pH 4)
Aluminium forms an amphoteric oxide. What can be deduced about aluminium oxide from this statement?
It reacts with sodium hydroxide to form a salt.
It decomposes on heating.
It is soluble in water.
It shows neither acidic nor basic properties.
Oxides of elements may be classified as acidic, basic or amphoteric.
Which set of oxides is correctly classified?
Acidic - Carbon dioxide
Basic - Copper(II) oxide
Amphoteric - Zinc oxide
Acidic - Carbon dioxide
Basic - Zinc oxide
Amphoteric - Copper(II) oxide
Acidic - Copper(II) oxide
Basic - Carbon dioxide
Amphoteric - Zinc oxide
Acidic - Zinc oxide
Basic - Carbon dioxide
Amphoteric - Copper(II) oxide
Flowers of a hydrangea bush are blue when grown in acidic soil and pink when the soil is alkaline.
Which substance is added to the soil of a hydrangea with blue flowers so that it produces pink flowers?
slaked lime
citric acid
copper
sodium chloride
