Question

7. By giving two reasons, prove that: (a) Air is a mixture, (b) Water is a compound,​

Answer 1

Answer:

Air is a mixture because:

1. It contains two or more pure substances.

2. By physical processes, it can be separated into a simpler substance.

3. Its composition is not fixed.

Water is a compound because:

1. Its composition is fixed and inseparable.

2. It has a definite formula and is present in a proportion by mass.

Answer 2

Answer:

A) Air is mixture

Air is mixture of many gases like oxygen etc but remember one thing mixture will always contain most of the same properties of its components for ex- Air is mixture of "gases" Air is also a gas

B)Water a compound

A compound will never match same properties as their components

Water = h²o (Oxygen + hydrogen)

water is mixture of gases but water is liquid

Explanation:

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