CLASS: IX NCERT (CBSE)
Chemistry
Matter in Our Surroundings
Question 1: Matter has ___________.
1. no mass but occupies space
2. mass but occupies no space
3. mass and occupies space
4. no mass and occupies no space
Answer: 3
Question 2: The gaseous form of water is called as _______.
1. water gas
2. water vapour
3. fog
4. snow
Answer: 2
Question 3: The state of matter with only one free surface is _______.
1. liquid
2. gas
3. solid
4. plasma
Answer: 1
Question 4: In gases, particles vibrate _________.
1. about their mean position
2. about a vertical axis
3. about a horizontal axis
4. in any direction
Answer: 4
Question 5: Mixing of gases is called ______.
1. diffusion
2. effusion
3. filtration
4. sedimentation
Answer: 1
Question 6: A property not possessed by a fluid is _________.
1. it can flow
2. it has mass
3. it has a definite shape
4. can be perceived by our senses
Answer: 3
Question 7: Which among the following is a solid at room temperature?
1. Nitrogen
2. Potassium permanganate
3. Bromine
4. Helium
Answer: 2
Question 8: Which of these is a characteristic property of gases?
1. Gases are not at all rigid.
2. Gases are not compressible.
3. Gases have particles in fixed positions.
4. Gases have high density.
Answer: 1
Question 9: A solid has _________.
1. maximum intermolecular space
2. definite mass but no definite volume
3. very high compressibility
4. maximum intermolecular force of attraction
Answer: 4
Question 10: Conversion of gas to liquid is called _________.
1. condensation
2. sublimation
3. vapourisation
4. solidification
Answer: 1
Question 11: The process by which wet clothes dry up is called _______.
1. evaporation
2. boiling
3. condensation
4. solidification
Answer: 1
Question 12: A solid that sublimes on heating is _________.
1. sodium chloride
2. copper sulphate
3. lead sulphate
4. ammonium chloride
Answer: 4
Question 13: Matter changes from one state to another with change in _________.
1. density
2. temperature
3. volume
4. height
Answer: 2
Question 14: The process of a solid changing into liquid is called ___________.
1. liquefaction
2. melting
3. freezing
4. solidification
Answer: 2
Question 15: The freezing point of pure water is __________.
1. 100oC
2. 0oC
3. 5oC
4. 78.3oC
Answer: 2
Question 16: The force between particles of matter is called as ___________.
1. cohesive force
2. adhesive force
3. kinetic energy
4. thermal energy
Answer: 1
Question 17: Particles of matter are __________.
1. stationary
2. vibrating in one position
3. in continuous motion
4. rotating about an axis
Answer: 3
Question 18: The temperature at which vapour changes into liquid is called ________.
1. freezing point
2. melting point
3. boiling point
4. liquefaction point
Answer: 4
Question 19: Temperature is a measure of ___________.
1. total kinetic energy of molecules
2. total potential energy of molecules
3. average potential energy of molecules
4. average kinetic energy of molecules
Answer: 1
Question 20: For any substance the temperature remains same during the change of state due to ___________.
1. loss of heat
2. latent heat
3. less supply of heat
4. lattice energy
Answer: 2
