EASY
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Compounds are formed of the same type of particles.

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Important Questions on Is Matter around Us Pure?

MEDIUM
Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Which of the following are not compounds?
(a) Chlorine gas
(b) Potassium chloride
(c) Iron
(d) Iron sulphide
(e) Aluminium
(f) iodine
(g) Carbon
(h) Carbon monoxide
(i) Sulphur powder
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Give two examples for Compounds.
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances

Pick out the odd-one from the following:

sugar, coal, milk, honey, bronze.

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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances

Complete the analogy:

Oxygen : element :: Carbon dioxide : _____.

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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Define the following term:
Compound
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Which of the following is not a compound?
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances

Using the definitions, decide whether the following diagram represents an element, a compound, or a mixture. Explain your choice.

Question Image

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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances

Explain the terms:

a.compound

b.colloid.

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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Which of the following is a compound? 
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Write three differences between a mixture and a chemical compound.    
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Define a compound.
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
How many types of elements combine to form water? Write the name of each element.
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances

Complete the following sentence:

A compound is _____. 

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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances

Define compound. Give three examples of compounds.

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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Is water a compound or mixture? Give two reasons in support of your answer.
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances

Give two examples for the following:

Compounds that contain hydrogen.

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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Benzene is a compound and it contains carbon and hydrogen.
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
A pure substance which contains two different kinds of atoms is called _____.
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
Compound consists of a group of atoms of different _____.     
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Science>Chemistry>Is Matter around Us Pure?>Types of Pure Substances
'Water is a compound and not an element'. Give evidence to support this statement.