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Chemistry : Elements, Compounds & Mixtures


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 an element?

  Calcium chloride

  Calcium chloride solution

  Calcium

  Half-n-half Clue
 

2.

Oxygen cannot be further subdivided into simpler substances by any physical or chemical means. Therefore, it is _______.

  a compound

  an element

  a mixture

  Half-n-half Clue
 

3.

Copper sulfate can be further subdivided into simpler substances by chemical means only. Therefore, it is _______.

  a mixture

  a compound

  an element

  Half-n-half Clue
 

4.

Which of the following is the smallest part of a compound, whose properties are the same as those of the compound?

  Mixture

  Element

  Molecule

  Atom

  Half-n-half Clue
 

5.

Copper sulfate solution can be further subdivided into simpler substances by physical (mechanical) means. Therefore, it is _______.

  a compound

  a mixture

  an element

  Half-n-half Clue
 

6.

H2 and Fe represent _______.

  elements

  compounds

  mixtures

  Half-n-half Clue
 

7.

Which of the following is a compound?

  Sodium

  Sodium sulfide solution

  Sodium sulfide

  Half-n-half Clue
 


 
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