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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 gases is green in color?

  Chlorine

  Hydrogen

  Neon

  Krypton

  Half-n-half Clue
 

2.

Which of the following is not a physical change?

  Oxidation

  Decantation

  Precipitation

  Distillation

  Half-n-half Clue
 

3.

A substance that absorbs moisture is called _______.

  hydrophobic

  amorphous

  hydrophilic

  hygroscopic

  Half-n-half Clue
 

4.

Which of the following is a chemical change?

  Freezing of water

  Boiling of water

  Dissolving of salt in water

  Rusting of iron

  Half-n-half Clue
 

5.

Which of the following is not an allotrope of carbon?

  Diamond

  Charcoal

  Graphite

  Silk

  Half-n-half Clue
 

6.

Catalysts speed up the rate of chemical reactions.

  True

  False

 

7.

A pH below 7 indicates _______.

  purity of the sample

  alkalinity

  presence of ions

  acidity

  Half-n-half Clue
 


 
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