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WorksheetsAcids,Bases and salts
Total questions: 15
Worksheet time: 5mins
Incorrect statement about acids is/are
They have sour taste
They may change the colour of the indicator
They turn blue litmus red
They turn red litmus blue
A substance has a pH value of 8. It is most likely to be what?
Strong acid
Weak acid
Strong base
Weak base
Which indicator is colourless in acid and pink in alkali?
Litmus
Phenolphthalein
Universal Indicator
Methyl Orange
An aqueous solution turns red litmus blue . Excess addition of which of the following would reverse the change
baking powder
lime
ammonium hydroxide solution
HCL
Which one of the following can be used as acid-base indicator by visually impaired student
litmus
turmeric
vanilla essence
petunia leaves
Statements 1 to 4 represent different steps in the preparation of lead iodide. Which of the following is the best sequence for synthesizing lead iodide?
1. Mix lead nitrate and potassium iodide
2. Dry
3. Filter
4. Mix lead sulphate and potassium iodide
1, 3, 2
4, 3, 2
1, 4, 2
4, 2, 3
Which of the following is the best description of a salt?
Forms when two metals react
Forms when a carbonate reacts with sodium hydroxide
Forms when all or part of the hydrogen ions in an acid is replaced
Forms when two alkali reacts
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
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
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
Different plants grow best under different pH conditions. Which plant grows best in alkaline soil?
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
1] The litmus paper is produced from
Lichens
Plant leaves
Fruits
Spinach
