MOCK TEST
AIR AND WATER
1. What are the properties of Air?
2. Why is water called a Universal solvent?
3. How will you remove insoluble impurities from water? Explain
4. Draw a pie-chart to show the composition of air also write the uses of each
important gas.
5. What is the Atmosphere? Name the various layers of the Atmosphere with a fer
lines on each layer
Answers
Answer:
Explanation:
Air takes up space.
Air has mass.
Air is affected by heat.
Air exerts pressure.
Air can be compressed.
Air is affected by altitude.
Answer :
1. The properties of air are:
Air takes up space.
Air has mass.
Air is affected by heat.
Air exerts pressure.
Air can be compressed.
Air is affected by altitude.
2.water is called the "universal solvent" because it dissolves more substances than any other liquid. ... This allows the water molecule to become attracted to many other different types of molecules.
3. The usual insoluble impurities are sand, clay, and organic matter. Insoluble suspended matter can be removed by allowing the water to stand and drawing off the clear portions from the sediment, or by filtration.
4. Uses of gas
Heating and cooling. In the commercial and residential sectors, gas is mainly used for space heating and cooling, water heating, and cooking. ...
Power generation. Power plants can use gas to generate electricity. ...
Transport.
5.Earth's atmosphere has a series of layers, each with its own specific traits. Moving upward from ground level, these layers are named the troposphere, stratosphere, mesosphere, thermosphere and exosphere. The exosphere gradually fades away into the realm of interplanetary space.