Acid-base Indicators Quiz

10 Questions | By Themes | Updated: Jun 18, 2022 | Attempts: 419

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We all love doing experiments in our chemistry lab, especially when it has to deal with acid-base indicators. Check out this quiz and review your acids and bases indicators knowledge which you have studied in your labs. These are also known as pH indicators and are substances that change their color with pH. These are either weak bases or weak acids. Take this quiz and give the correct answers to the questions related to them.

Questions and Answers

1.

Indicators which are organically found in nature are known as
- A.
  
  Man-made indicators
- B.
  
  Natural indicators
- C.
  
  Synthetic indicators
- D.
  
  Olfactory indicators
2.

Which substance completely dissociates in water?
- A.
  
  Strong acids
- B.
  
  Weak acids
- C.
  
  Strong bases
- D.
  
  Weak bases
3.

What do acids do to red litmus paper?
- A.
  
  Turn it blue
- B.
  
  Does not have any effect on it.
- C.
  
  Turn it yellow
- D.
  
  All of the above
4.

The indicator that turn pink in alkali solution is
- A.
  
  Litmus paper
- B.
  
  Turmeric
- C.
  
  Methyl orange
- D.
  
  Phenolpthalein
5.

Can an amphoteric substance act as both an acid and a base?
- A.
  
  True
- B.
  
  False
6.

The statement that does not describe about litmus paper is
- A.
  
  Blue litmus paper turn red in acidic solution
- B.
  
  Blue litmus paper turns red in basic solution
- C.
  
  Red litmus paper turns blue in basic solution
- D.
  
  Red litmus remain same in water
7.

Litmus is an indicator used to test the strength of acidic or basic solution.
- A.
  
  True
- B.
  
  False
8.

The substances which when added to an acid or base change colour and indicate the nature of substances being tested is known as
9.

Bases are sometimes called alkalis.
- A.
  
  True
- B.
  
  False