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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 a chemical change?

  Boiling of water

  Rusting of iron

  Dissolving of salt in water

  Freezing of water

  Half-n-half Clue
 

2.

What gas is evolved when dilute sulfuric acid is added to zinc?

  Hydrogen

  Hydrogen Peroxide

  Argon

  Sulfur Dioxide

  Half-n-half Clue
 

3.

Catalysts speed up the rate of chemical reactions.

  True

  False

 

4.

The 'fizz' in soft drinks is caused by _______.

  nitrogen

  Carbon dioxide

  hydrogen

  helium

  Half-n-half Clue
 

5.

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

  True

  False

 

6.

Which of the following is not an acid?

  NaOH

  HNO3

  HCl

  H2SO4

  Half-n-half Clue
 

7.

Heat is liberated in _______ reactions.

  exothermic

  substitution

  all chemical

  endothermic

  Half-n-half Clue
 


 
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