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- 1. Multiple Choice
In which state of matter , process of diffusion is fastest?
Liquids
Gases
Solids
Semi - solids
- 2. Multiple Choice
The substances which occupy some space and having some mass called
Particles
Impure substance
Ions
Matter
- 3. Multiple Choice
Particles of matter having space between them is called
Interstitial space
Intermolecular space
Vacant space
None of the above
- 4. Multiple Choice
On converting 250C, 380C and 660C to kelvin scale,the correct sequence of temperature will be
298 K,311 K and 339 K
298 K,300 K and 338 K
- 5. Multiple Choice
Latent heat of fusion is amount of
heat energy required to change 1 kg solid into liquid completely at its melting point.
heat energy required to convert 1 kg solid into liquid at room temperature
heat energy required to change 1 g of solid into liquid completely
heat energy required to change 1 kg of solid into liquid at any temperature.
- 6. Multiple Choice
When water gets solidified into ice, then heat is:
absorbed
evolved
first absorbed then evolved
initially evolved then absorbed
- 7. Multiple Choice
The physical state of a matter depends upon
temperature and pressure
temperature only
pressure only
nature of substance
- 8. Multiple Choice
A student notices that a substance "X" has fixed volume and when transferred from one container to another, it takes the shape of that container. Identify the state of matter that substance "X" belong to:
Liquid & gas
Gas
Solid
Liquid
- 9. Multiple Choice
A student adds ink to water. The ink particles spread throughout the water. Which property of water allows the ink particles to diffuse in it?
fixed volume
inability to compress
intermolecular spaces
ability to change shape
- 10. Multiple Choice
Density of a substance is defined as
ratio of mass and temperature
product of mass and volume
ratio of mass and volume
product of mass and temperature
- 11. Multiple Choice
Which of the following has minimum spaces among the particles
Solids
Liquids
Gases
None of these
- 12. Multiple Choice
Which of the following is not a property of matter?
Matter is made up of extremely small particles
There is space between particles of matter
The particles of matter are in stationery state
The particles of matter attract each other.
- 13. Multiple Choice
On Converting 38°C And 66°C To Kelvin Scale, The Correct Sequence Of Temperature Will Be
311 K and 339 K
300 K and 338 K
278 K and 543 K
310 K and 338 K
- 14. Multiple Choice
when 2-3 crystals of potassium permanganate are dissolved in water, the colour of water will be
blue
green
yellow
purple pink
- 15. Multiple Choice
which of the following is matter
air
stone
cloud
all of them
- 16. Multiple Choice
the 'panch tatva' or five basic elements are air,water,fire,earth and ___________?
trees
animals
sky
moon
- 17. Multiple Choice
Which is known as dry ice.
CO2
H2O
Fruit ice
Both a &b
- 18. Multiple Choice
The amount of heat which is used to change the state of matter not for increase the temperature is called
Latent heat
Specific heat
Heat capacity
None of the above.
- 19. Multiple Choice
235K = _________°C
38
-20
20
-38
- 20. Multiple Choice
Which of the following statements is NOT true?
The molecules in a liquid and a gas can flow.
The molecules in a liquid are arranged in a regular pattern.
The molecules in a gas move about randomly at high speed.
The molecules in a solid vibrate about a fixed position
- 21. Multiple Choice
Name the process by which dry ice changes into carbon dioxide gas.
Evaporation
Condensation
Sublimation
Vaporisation
- 22. Multiple Choice
At what temperature liquid water and steam co-exist?
At the melting point of ice
At the boiling point of water
At the freezing point of water
At the condensation point
- 23. Multiple Choice
Melting point of ice is
273 K
373 K
100°C
250 K
- 24. Multiple Choice
In which of the following conditions, the distance between the molecules of hydrogen gas would decrease?
Increasing the pressure on hydrogen in a closed container
Increasing the volume of the container of hydrogen gas
Heating the container
Some hydrogen gas leaking out of container
- 25. Multiple Choice
Which one among the followings has a fixed volume but no fixed shape?
Carbon dioxide
Ice
Kerosene
Xenon
- 26. Multiple Choice
In which form, do the water molecules have less kinetic
energy?
(a) Ice
(b) Water
(c) Steam
(d) All of them have equal kinetic energy
- 27. Multiple Choice
Which of the following is not correct regarding gases?
(a) Gases exert pressure.
(b) Gases have large intermolecular spaces.
(c) Gases have weak tendency to diffuse.
(d) Gases have weak intermolecular forces of
attraction.
- 28. Multiple Choice
Seema took a 100 ml beaker and filled half the beaker with water and marked the level of water. She dissolved some salt with the help of a glass rod and recorded water level again.
The water level increases appreciably
The water level decreases
The water level remains the same
There is little increase in water level.
- 29. Multiple Choice
Which one of the following sets of phenomenon would increase on raising the temperature?
Diffusion, evaporation and compression of gases
Evaporation, compression of gases and solubility of solid in liquid
Evaporation, diffusion, expansion of gases and solubility of solid in liquid
Evaporation, solubility of gas in liquid, diffusion and compression of gases.
- 30. Multiple Choice
Which of the following is correct order of forces of attraction?
Water > Air > Sand
Air > Sugar > Oil
Air < Water < Sugar
Salt > Air > Juice
- 31. Multiple Choice
Which of the following is correct order of density ?
Air < Exhaust from chimneys < Honey < Water < Chalk < Cotton < Iron.
Air < Exhaust from Chimneys < Water < Honey < Cotton < Chalk < Iron.
Air < Exhaust from Chimneys < Honey < Water < Chalk < Iron < Cotton
Air < Exhaust from Chimneys < Water < Honey < Chalk < Cotton < Iron
- 32. Multiple Choice
Which of the following does not affect rate of evaporation?
Wind speed
Surface area
Temperature
Insoluble heavy impurities
- 33. Multiple Choice
Which of the following statement is not true regarding the characteristic of matter?
Particles of a matter are randomly moving in all directions.
Kinetic energy of the particles increases with a rise in temperature
Kinetic energy of the particles of all maters remains the same at a particular temperature.
Particles of matter diffuse into each other on their own.
- 34. Multiple Choice
Which of the following phenomena always results in the cooling effect?
condensation
sublimation
crystallisation
evaporation
- 35. Multiple Choice
When heat is constantly supplied by a burner to boiling water, then the temperature of water during vapourisation
Rises very slowly
Rises rapidly until steam is produced
First rises and then becomes constant
Does not rise at all
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