NEW
Font size
WorksheetsAcids and Alkalis
Total questions: 41
Worksheet time: 44mins
Which statements are properties of an acid?
1 reacts with ammonium sulfate to form ammonia
2 turns red litmus blue
A 1. Yes; 2. Yes
B 1. Yes; 2. No
C 1. No; 2. Yes
D 1. No; 2. No
Which property is not characteristic of a base?
A It reacts with a carbonate to form carbon dioxide.
B It reacts with an acid to form a salt.
C It reacts with an ammonium salt to form ammonia.
D It turns universal indicator paper blue.
A sting from insect X has a pH of 6 and a sting from insect Y has a pH of 8. The table shows the pH of four substances.
Which substances are used to treat the two stings?
A X = hydrochloric acid; Y = sodium hydroxide
B X = sodium hydrogen carbonate; Y = vinegar
C X = sodium hydroxide; Y = hydrochloric acid
D X = vinegar ; Y = sodium hydrogen carbonate
Three liquids, P, Q and R, are added to a mixture of hydrochloric acid and Universal Indicator solution.
The following observations are made.
P the colour of the indicator turns purple.
Q the colour of the indicator does not change.
R there is effervescence and the indicator turns blue.
What are P, Q and R?
A P = sodium carbonate solution; Q= water; R = sodium hydroxide solution
B P = sodium hydroxide solution; Q= water; R = sodium carbonate solution
C P = water; Q= sodium carbonate solution; R = sodium hydroxide solution
D P = water ; Q= sodium hydroxide solution ; R = sodium carbonate solution
Which property is NOT characteristic of a base?
A It reacts with a carbonate to form carbon dioxide.
B It reacts with an acid to form a salt.
C It reacts with an ammonium salt to form ammonia.
D It turns universal indicator paper blue.
The table shows the pH of four aqueous solutions, W, X, Y and Z.
Universal Indicator is added to each solution.
Which row in the second table shows the colour of each solution after the indicator is added?
A
B
C
D
Hydrochloric acid is used to clean metals. The acid reacts with the oxide layer on the surface of the metal, forming a salt and water.
Which word describes the metal oxide?
A alloy
B base
C element
D indicator
Which statement is not correct?
A When a base reacts with an ammonium salt, ammonia is given off.
B When an acid reacts with a base, neutralisation takes place.
C When an acid reacts with a carbonate, carbon dioxide is given off.
D When the acidity of a solution increases, the pH increases.
Which reaction is not characteristic of an acid?
A It dissolves magnesium oxide.
B It produces ammonia from ammonium compounds.
C It produces carbon dioxide from a carbonate.
D It produces hydrogen from zinc metal.
Which equation for the reaction between sodium carbonate and dilute hydrochloric acid is correct?
A Na2CO3(s) + HCl(aq) → NaCl(aq) + CO2(g) + H2O(I)
B Na2CO3(s) + HCl(aq) → Na2Cl(aq) + CO2(g) + H2O(I)
C Na2CO3(s) + 2HCl(aq) → NaCl(aq) + CO2(g) + H2O(I)
D Na2CO3(s) + 2HCl(aq) → 2NaCl(aq) + CO2(g) + H2O(I)
Three chemicals, P, Q and R, were each dissolved in water. The table shows some of the reactions of these solutions.
The pH of the three solutions was also measured.
What are the correct pH values of these solutions?
A P = 2; Q = 7; R = 13
B P = 2; Q = 1; R = 7
C P = 7; Q = 2; R = 13
D P = 13; Q = 7; R = 2
Which substance is the most acidic?
A
B
C
D
The graph shows how the pH of soil in a field changes over time. At which point was the soil neutral?
A
B
C
D
A colourless solution is tested by the following reactions. Which reaction is not characteristic of an acid?
A A piece of magnesium ribbon is added. Bubbles are seen and the magnesium disappears.
B A pungent smelling gas is produced when ammonium carbonate is added.
C Copper oxide powder is added and the mixed is warmed. The solution turns blue.
D The solution turns blue litmus red.
Which statements about alkalis are correct?
1 When reacted with an acid, the pH of the alkali increases.
2 When tested with litmus, the litmus turns blue.
3 When warmed with an ammonium salt, ammonia gas is given off.
A 1, 2 and 3
B 1 and 2 only
C 1 and 3 only
D 2 and 3 only
Different plants grow best under different pH conditions. Which plant grows best in alkaline soil?
A
B
C
D
Which statements about alkalis are correct?
1 When reacted with an acid, the pH of the alkali increases.
2 When tested with litmus, the litmus turns blue.
3 When warmed with an ammonium salt, ammonia gas is given off.
A 1, 2 and 3
B 1 and 2 only
C 1 and 3 only
D 2 and 3 only
Which are properties of an acid?
1. reacts with ammonium sulfate to form ammonia
2. turns red litmus blue
A 1. yes; 2. yes
B 1. yes; 2. no
C 1. no; 2. yes
D 1. no; 2. no
Carbon dioxide is produced when:
X reacts with ethanol.
Y reacts with sodium carbonate.
What are X and Y?
A
B
C
D
Ant stings hurt because of the methanoic acid produced by the ant.
Which substance could, most safely, be used to neutralise the acid?
A
B
C
D
The diagram shows an experiment.
What happens to the pieces of litmus paper?
A blue litmus paper - changes colour; red litmus paper - changes colour.
B blue litmus paper - changes colour; red litmus paper - no colour change.
C blue litmus paper - no colour change; red litmus paper - changes colour.
D blue litmus paper - no colour change; red litmus paper - no colour change.
Two indicators, bromophenol blue and Congo red, show the following colours in acidic solutions and in alkaline solutions.
A few drops of each indicator are added to separate samples of a solution of pH 2.
What are the colours of the indicators in this solution?
A
B
C
D
Which statement about the reaction of acids is correct?
A They react with ammonium salts to form a salt and ammonia only.
B They react with metal carbonates to give a salt and carbon dioxide only.
C They react with metal hydroxides to give a salt and water only.
D They react with metals to give a salt, hydrogen and water only.
Strong acids and strong alkalis are.......
Able to turn blue litmus paper red
Corrosive
Sour
Sweet
Acid + Alkali --> Salt + Water
neutralization reaction
synthesis
decomposition
single displacement
Alkalis are source of
hydrogen ions
hydroxide ions
Which of the following is INCORRECT for an acid?
Sour taste
pH is less than 7
Turn red litmus solution blue
Must contain H in the formula
When magnesium ribbon is added to dilute hydrochloric acid, the followings will occur EXCEPT
Gas bubbles are given off and a "pop" sound is heard when testing with a burning splint.
The metal ribbon disolves to form a colourless solution.
The salt form is magnesium chloride.
The reaction is called neutralisation.
Which of the following metals has NO reaction with a dilute acid?
Copper
Zinc
Calcium
Iron
Which of the following gas will be formed when sodium hydrogencarbonate reacts with dilute hydrochloric acid?
Hydrogen
carbon dioxide
Oxygen
Nitrogen
Whihc of the following statement is True?
The colour of methyl orange in acid solution is yellow.
The basicity of CH3COOH is 4.
H2SO4 is a weak acid.
A strong acid can completely dissociate in water to give H+ ions.
