CBSE Questions for Class 9 Chemistry Matter In Our Surroundings Quiz 6 - MCQExams.com

A liquid can change its shape easily. This can be attributed to which of the following fact.
  • Strong intermolecular forces.
  • Weak intermolecular forces.
  • Non existing intermolecular forces.
  • Either A or C
Solid $$CO_2$$ gets converted into gaseous state on decreasing the ___________.
  • pressure
  • temperature
  • heat
  • None of these
Which among the following have moderate intermolecular forces?
  • Solids
  • Liquids
  • Gases
  • Equal in liquids and gases both
What is the effect on the chemical and physical properties of water when the temperature is changed?
  • The chemical properties of water remain the same but the physical state changes with a temperature change.
  • The chemical properties of water change with temperature change but physical properties remain the same.
  • There is no effect on the chemical or physical properties of water when the temperature is changed.
  • Both chemical and physical properties of water change with a temperature change.
The intermolecular forces of attraction is maximum in _______.
  • solid
  • liquid
  • gas
  • none of these
Different states of same substance are due to the difference in ________.
  • temperature
  • pressure
  • Both A and B
  • none of the above
Matter cannot be destroyed.
  • True
  • False
Liquids occupy a definite volume but have no definite shape. It takes the shape of the container.
  • True
  • False
Study the given diagram carefully and select the correct option.
802694_50058361c2c247218daa054599f4bed7.jpg
  • X- Solid, Y- Liquid, R- Heating
  • Y- Gas, Z- Liquid, T- Heating
  • X- Solid, Z- Gas, P-Freezing
  • Y- Gas, X- Liquid, Q- Cooling
Absolute scale of Temperature was put forward by:
  • Celsius
  • Lord Kelvin
  • Lewis
  • Fahrenheit
The increases in temperature of water above its boiling point in the pressure cooker is due to change in:
  • pressure
  • volume
  • mass
  • all of these
Latent heat is evolved during the transformation of liquids into solids. 
How will you explain this statements?
  • Heat is released and temperature decreases
  • Heat is absorbed and temperature increases
  • Heat does not get absorbed nor released
  • None of the above
Which of the following decreases the rate of evaporation?
  • Increase in surface area
  • Increase in temperature
  • Increase in humidity
  • Increase in wind speed
Hot liquids gets cooled faster  
  • inside house in winter
  • in the open in winter
  • in the open in summer
  • inside house in summer
Addition of solute to a given solvent in a closed container
  • decrease the rate of condensation.
  • decrease the rate of evaporation.
  • increase the rate of evaporation.
  • decrease both the rate of evaporation and condensation.
Matter is ______ in nature. 
  • Paticulate
  • electrial
  • both a and b
  • none
Answer the following question (11 to 15) from the graph 
The process which occurs in going from $$B \to C$$ is :
1569805_2814d416349a470cb71e356537619f2f.PNG
  • isothermal
  • adiabatic
  • isobaric
  • isochoric
Write true or false for the statement. Rewrite the false statement correctly.
Solids can be compressed easily.
  • True
  • False
The rate of evaporation increase with increasing:
  • surface area
  • temperature
  • humidity
  • wind speed
During change of state of matter, the temperature remains the same due to:
  • loss of heat
  • less supply of heat
  • latent heat
  • lattice energy
Which one of the following statement is correct ? 
  • Both boiling and evaporation are surface phenomena.
  • Boiling is a surface phenomenon, but evaporation is a bulk phenomenon
  • Both boiling and evaporation are bulk phenomena.
  • Boiling is a bulk phenomenon, but evaporation is a surface phenomenon
A fully inflated balloon goes higher in the atmosphere, so what will be the pressure outside and inside the balloon respectively.
  • Increases, Decreases
  • Decreases, Increases
  • Decreases, Remains constant
  • Increases, Remains constant
Which one of the following statement is correct in respect of fluids?
  • Only gases behave as fluids
  • Gases and solids behave as fluids
  • Gases and liquid behave as fluids
  • Only liquids behave as fluids
Evaporation of a liquid takes place at:
  • any temperature lower than its boiling point.
  • a fixed temperature higher than its boiling point.
  • a fixed temperature and pressure.
  • all temperatures.
Write true or false for the following statement:

Latent heat means the heat which can be seen easily.
  • True
  • False
During the evaporation process, the heat is:
  • Absorbed
  • Evolved
  • First absorbed then evolved
  • Initially evolved and then absorbed
Write true or false for the following statements:
The term vapour describes the gaseous state of a substance that normally exists as a liquid or solid.
  • True
  • False
Evaporation is a
  • surface phenomenon
  • bulk phenomenon
  • both surface and the bulk phenomenon
  • none of A or B
Pick the change that can be reversed from the following 
  • Cutting of trees
  • Melting of ghee
  • Burning of candle
  • Blooming of flower
Write whether the following statement is true or false.
A gas has no free surface.
  • True
  • False
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