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Chemistry : General Chemistry


Answer the following questions by choosing the most appropriate option.

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Multiple choice

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1.

Which of the following is not a physical change?

  Oxidation

  Decantation

  Precipitation

  Distillation

  Half-n-half Clue
 

2.

The lead of a pencil mainly contains _______.

  plastics

  carbon black

  lead

  graphite

  Half-n-half Clue
 

3.

Acids turn blue litmus paper _______.

  red

  pink

  yellow

  colorless

  Half-n-half Clue
 

4.

What is the combination of any substance with oxygen known as?

  Hydrogenation

  Combustion

  Oxidation

  Reduction

  Half-n-half Clue
 

5.

Which of the following is not an acid?

  HCl

  HNO3

  H2SO4

  NaOH

  Half-n-half Clue
 

6.

Which of the following gases is green in color?

  Krypton

  Neon

  Chlorine

  Hydrogen

  Half-n-half Clue
 

7.

A pH below 7 indicates _______.

  alkalinity

  purity of the sample

  presence of ions

  acidity

  Half-n-half Clue
 


 
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