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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.

Heat is liberated in _______ reactions.

  exothermic

  endothermic

  substitution

  all chemical

  Half-n-half Clue
 

2.

A substance that absorbs moisture is called _______.

  hygroscopic

  hydrophobic

  hydrophilic

  amorphous

  Half-n-half Clue
 

3.

Which of the following is a chemical change?

  Boiling of water

  Freezing of water

  Dissolving of salt in water

  Rusting of iron

  Half-n-half Clue
 

4.

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

  Oxidation

  Reduction

  Hydrogenation

  Combustion

  Half-n-half Clue
 

5.

A pH below 7 indicates _______.

  alkalinity

  purity of the sample

  presence of ions

  acidity

  Half-n-half Clue
 

6.

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

  True

  False

 

7.

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

  Carbon dioxide

  hydrogen

  helium

  nitrogen

  Half-n-half Clue
 


 
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