Acids & Alkalis 1

1.
1 pts.
The acid in our stomach, that helps to break down food during digestion is
A. hydrochloric acid
B. nitric acid
C. sulphuric acid
D. vinegar
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2.
1 pts.
An alkali has a pH of
A. 7
B. less than 7
C. greater than 7
D. 14
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3.
1 pts.
An acid has a pH of
A. 7
B. less than 7
C. greater than 7
D. 1
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4.
1 pts.
An example of a commonly used alkali is
A. citric acid
B. sodium hydroxide
C. vinegar
D. sodium tartrate
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5.
1 pts.
Ammonia is a weaker alkali than sodium hydroxide. Its pH is likely to be…..
A. 1
B. 4
C. 9
D. 14
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6.
1 pts.
Citric acid occurs naturally in…….
A. potatoes
B. limestone
C. lemons
D. table salt
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7.
1 pts.
Which one of the following statements is correct for acids? Acids
A. have a pH greater than7
B. give off a smoke
C. have pH equal to 7
D. are corrosive
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8.
1 pts.
Maryam stated that a bottle contained a weak acid. She knew this because
A. she had tested it with pH indicator and found its pH was 1
B. she had tested it with pH indicator and found its pH was 5
C. she had tested it with pH indicator and found its pH was 9
D. she had tested it with pH indicator and found its pH was 13
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9.
1 pts.
Hamish found a bottle containing a solution. He wasn’t sure what it was, and tested it with pH paper. He said it was a strong alkali. He knew this because
A. he found it had a pH of 1
B. he found it had a pH of 5
C. he found it had a pH of 7
D. he found it had a pH of 14
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10.
1 pts.
Which of the following household substances would be an alkali?
A. apple juice
B. window cleaner
C. Pepsi
D. pure water
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11.
1 pts.
If we add some water to a solution of strong acid
A. its pH will increase because it becomes more dilute
B. its pH will decrease because it becomes more dilute
C. its pH will increase because it becomes more concentrated
D. its pH will decrease because it becomes more concentrated
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12.
1 pts.
Choose the word from the options to correctly complete the following statement. The ___________ scale measures the acidity of a substance
A. neutral
B. pH
C. acid
D. litmus paper
E. universal indicator
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13.
1 pts.
When in the presence of a strong acid Universal indicator turns
A. red
B. yellow
C. green
D. blue
E. purple
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14.
1 pts.
When in the presence of a weak alkali, Universal indicator turns
A. red
B. yellow
C. green
D. blue
E. purple
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15.
1 pts.
A student tested a solution with Universal indicator. It turned yellow. This most likely meant that the solution he had was
A. a strong acid
B. a strong alkali
C. a weak acid
D. a weak alkali
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