Do You Have Knowledge About Acids And Bases?
A mixture of dyes is called universal indicator. This is more useful than litmus as it can be used to measure how strong an acid or an alkali is using the pHscale. A pH of 7 is neutral (like for example water); a pH of 1 or 2 is a strong acid (for example sulfuric acid); weak acids like vinegar have a pH of 3 to 6. Weak alkalis (like soap) have pH values of 8 to 10 and a strong alkali like sodium hydroxide will have a pH of 13 or 14.
- 1.
![Which of the following pH numbers indicate a strong alkali? - ProProfs]( "Which of the following pH numbers indicate a strong alkali?")
Which of the following pH numbers indicate a strong alkali?- A.
1
- B.
5
- C.
9
- D.
14
- 2.
![Which of the following acids do we have in our stomach? - ProProfs]( "Which of the following acids do we have in our stomach?")
Which of the following acids do we have in our stomach?- A.
Ethanoic acid
- B.
Hydrochloric acid
- C.
Nitric acid
- D.
Sulfuric acid
- 3.
![Which of the following substances contain acid? - ProProfs]( "Which of the following substances contain acid?")
Which of the following substances contain acid?- A.
An orange
- B.
Bleach
- C.
Distilled water
- D.
Washing powder
- 4.
![Which of the following pH numbers indicates a strong acid? - ProProfs]( "Which of the following pH numbers indicates a strong acid?")
Which of the following pH numbers indicates a strong acid?- A.
1
- B.
5
- C.
7
- D.
14
- 5.
![Which of the following substances contain an alkali? - ProProfs]( "Which of the following substances contain an alkali?")
Which of the following substances contain an alkali?- A.
Baking powder
- B.
Coca cola
- C.
Distilled water
- D.
Vinegar
- 6.
![What colour is universal indicator in strong acid? - ProProfs]( "What colour is universal indicator in strong acid?")
What colour is universal indicator in strong acid?- A.
Green
- B.
Orange
- C.
Purple
- D.
Red
- 7.
![Strong acids and strong alkalis are....... - ProProfs]( "Strong acids and strong alkalis are.......")
Strong acids and strong alkalis are.......- A.
Able to turn blue litmus paper red
- B.
Corrosive and/or caustic
- C.
Sour
- D.
Sweet
- 8.
![What colour is universal indicator in a strong alkali? - ProProfs]( "What colour is universal indicator in a strong alkali?")
What colour is universal indicator in a strong alkali?- A.
Green
- B.
Orange
- C.
Purple
- D.
Red
- 9.
![What colour is universal indicator in a neutral solution? - ProProfs]( "What colour is universal indicator in a neutral solution?")
What colour is universal indicator in a neutral solution?- A.
Green
- B.
Orange
- C.
Purple
- D.
Red
- 10.
![Which of the following pH numbers indicates a neutral substance? - ProProfs]( "Which of the following pH numbers indicates a neutral substance?")
Which of the following pH numbers indicates a neutral substance?- A.
1
- B.
5
- C.
7
- D.
14
Questions: 9 | Attempts: 17534 | Last updated: Feb 23, 2021
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Sample QuestionList 3 properties of an acid?
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Sample QuestionPH paper is put in a solution, which turns red. What is this?
Questions: 8 | Attempts: 8418 | Last updated: May 17, 2021
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Sample QuestionThe Concentration of NaOH is 0.5 M if 20 ml is needed to titrate 35 mL of acid, what is the concentration of the acid?
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