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Chemistry : General Chemistry


Answer the following questions by choosing the most appropriate option.

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Multiple choice

Your Performance  

1.

The lead of a pencil mainly contains _______.

  plastics

  graphite

  carbon black

  lead

  Half-n-half Clue
 

2.

A pH below 7 indicates _______.

  presence of ions

  purity of the sample

  alkalinity

  acidity

  Half-n-half Clue
 

3.

Which of the following is not a physical change?

  Decantation

  Precipitation

  Oxidation

  Distillation

  Half-n-half Clue
 

4.

Which of the following is not an allotrope of carbon?

  Graphite

  Silk

  Diamond

  Charcoal

  Half-n-half Clue
 

5.

Which of the following is not an acid?

  H2SO4

  HCl

  NaOH

  HNO3

  Half-n-half Clue
 

6.

Solubility of a substance in a solvent usually increases with an increase in temperature.

  True

  False

 

7.

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

  Oxidation

  Reduction

  Combustion

  Hydrogenation

  Half-n-half Clue
 


 
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