Substances and Their States

Q.

Explain why liquids can flow but are not compressible.

Q.

Water is matter because it has_____________ and occupies_____________.

Q. Arrange the following layers of soil in the correct order of their occurrence from topmost layer to the bottom most one.
Weathered rocks, Humus, Subsoil, Topsoil, Bedrock

1. Topsoil, Subsoil, Weathered rocks, Humus, Bedrock
2. Weathered rocks, Humus, Subsoil, Topsoil, Bedrock
   
3. Humus, Topsoil, Subsoil, Weathered rocks, Bedrock
4. Topsoil, Humus, Subsoil, Weathered rocks, Bedrock
   

Q.

State three important characteristics of liquid.

Q. Which of the following statement is true about air?

1. It is opaque.
2. It is made up of only one substance.
3. It contains water vapour.
4. It contains 70% of oxygen.

Q. Which among the following is not a matter?

1. Time
2. Sugar
3. Book
4. Honey

Q.

Falling droplets of water are spherical in shape. This illustrates that

1. particles of matter have space between them.

2. particles of matter are always in random motion.

3. particles of matter attract each other.

4. particles of matter are very small.

Q.

name two gases which dissolve in water

Q.

Which of the following is not matter?

1. Energy

2. Soil

3. Chalk

4. Car

Q. Assertion : Reason: Excessive growth of micro organism in soil depletes its organic content

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q.

Which of the following statement is false?

1. Liquids have indefinite shape.

2. Liquids are easily compressible.

3. Liquids are difficult to compress.
4. Liquids have definite volume.

Q.

Define matter

Q.

Which state of matter are rigid and tightly packed particles?

1. Fluid

2. Liquid

3. Gas

4. Solid

Q.

Identify the correct statements that defines matter.

1. Anything that occupy space

2. Anything that has mass

3. Only those which can be seen with human naked eye

4. Only those having odour

Q. What are the conditions for gases at STP and NTP ??

Q. Choose the correct pairs.

1. Solid
2. Liquid
3. Gas
4. Black-board
5. Water
6. Oxygen

Q. Which of the following substance can be found in all three states of matter?

1. Sand
2. Oxygen
3. Water
4. Iron

Q. Which amongst the following statement is true for matter?

1. It is weightless.
2. It has no mass.
3. It occupies space.
4. It has no fixed shape.