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Chemistry : Indicators, pH & Litmus


Answer the following questions by choosing the most appropriate option.

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Multiple choice

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1.

A pH scale reading of more than 7 indicates _______ medium.

  an unknown

  an acidic

  a basic

  a neutral

  Half-n-half Clue
 

2.

A pH scale reading of 2 indicates a _______.

  strong base

  strong acid

  weak base

  weak acid

  Half-n-half Clue
 

3.

Sodium hydroxide turns red litmus paper blue.

  True

  False

 

4.

A pH scale reading of 13 indicates a _______.

  weak base

  weak acid

  strong base

  strong acid

  Half-n-half Clue
 

5.

A pH scale reading of _______ indicates a weak acid.

  2

  6

  13

  8

  Half-n-half Clue
 

6.

A pH scale reading of _______ indicates a weak base.

  13

  8

  2

  6

  Half-n-half Clue
 

7.

Addition of phenolphthalein solution to an acid results in no color change.

  True

  False

 


 
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