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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.

A substance that speeds up the rate of a chemical reaction without undergoing any change itself is known as a _______.

  cation

  catalyst

  nucleus

  counter ion

  Half-n-half Clue
 

2.

The two allotropes of phosphorus are _______ and _______.

  Red, Yellow

  Rhombic, Monoclinic

  Alpha, Beta

  Crystalline, Amorphous

  Half-n-half Clue
 

3.

Catalysts speed up the rate of chemical reactions.

  True

  False

 

4.

A pH below 7 indicates _______.

  alkalinity

  acidity

  purity of the sample

  presence of ions

  Half-n-half Clue
 

5.

Lemon juice is _______ in nature.

  metallic

  acidic

  neutral

  basic

  Half-n-half Clue
 

6.

A substance that absorbs moisture is called _______.

  hygroscopic

  hydrophobic

  amorphous

  hydrophilic

  Half-n-half Clue
 

7.

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

  Hydrogen

  Argon

  Hydrogen Peroxide

  Sulfur Dioxide

  Half-n-half Clue
 


 
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