Q1. In which state does water exist at 50° C?
- Liquid
- Solid
- Gas
- None of the above
- Q2. What will be the state of a substance below its freezing point?
- Solid state
- Liquid state
- Gaseous state
- Q3. What happens when a liquid becomes a gas?
- The particles of the liquid absorb heat energy and the distance between them increases.
- The particles of the liquid absorb heat energy and the distance between them decreases.
- The particles of the liquid absorb heat energy and kinetic energy decreases.
- The particles of the liquid absorb the heat energy and force of attraction increases.
- Q4. Matter is defined as
- Anything that has a characteristic smell is matter.
- Anything that has mass is matter.
- Anything that occupies space is a matter.
- Anything that occupies space and has mass is matter.
- Q5. Latent heat of fusion is the amount of heat energy required to change
- 1 kg of solid into its gaseous state at its boiling point.
- 1 kg of liquid into its gaseous state at its boiling point.
- 1 kg of solid into its liquid state at its melting point.
- 1 kg of liquid into its solid state at its freezing point.
- Q6. What affects the change of state the most?
- Heat
- Density
- Mass
- Volume
- Q7. Which of the following is a correct relationship between Kelvin scale and Celsius scale?
- Kelvin scale (K) = Celsius scale (°C) + 273
- Kelvin scale (K) = Celsius scale (°C) - 273
- Kelvin scale (K) = Celsius scale (°C) + 100
- Kelvin scale (K) = Celsius scale (°C) - 100
- Q8. Which property of a gas helps to fill a large volume of liquefied petroleum gas (LPG) in cylinders?
- High inflammability
- High fluidity
- High compressibility
- Low density
- Q9. What is the effect of dryness of air on evaporation?
- Rate of evaporation increases with increase in dryness of air.
- Rate of evaporation decreases with increase in dryness of air.
- Dryness of air has no effect on rate of evaporation.
- Dryness of air decreases the cooling effect caused by evaporation.
- Q10. Which of the following states of matter takes the shape of the container in which it is filled?
- Solid
- Liquid
- Gas
- Both liquid and gas
- Q11. A puddle formed by rain water dries up in bright sunshine. Which physical process is involved in this example?
- Evaporation
- Condensation
- Liquefaction
- Sublimation
- Q12. For evaporation to take place, latent heat of fusion must be supplied.
- True
- False
- Q13. Which property of a gas helps to fill a large volume of liquefied petroleum gas (LPG) in cylinders?
- High inflammability
- High fluidity
- High compressibility
- Low density
- Q14. What happens when sugar is added to water?
- Volume of water doubles.
- Volume of water decreases.
- Volume of water remains the same.
- None of the above
- Q15. Which of the following is not true regarding the process of evaporation?
- It never occurs at room temperature.
- It occurs below the boiling point.
- It occurs at normal air pressure.
- It requires latent heat to occur.
- Q16. Humidity is the amount of which substance present in the air?
- Water vapour
- Oxygen
- Carbon dioxide
- Sunlight
- Q17. The theory which visualizes that solid, liquid or gas is made up of tiny particles which are in constant motion is called _______ .
- kinetic theory of matter
- latent heat of fusion
- latent heat of vaporization
- interconversion of states of matter
- Q18. The rate of diffusion of a gas depends upon its pressure.
- True
- False
- Q19. Matter is defined as
- Anything that has a characteristic smell is matter.
- Anything that has mass is matter.
- Anything that occupies space is a matter.
- Anything that occupies space and has mass is matter.
- Q20. What is the effect of wind speed on evaporation?
- Evaporation increases with wind speed.
- Evaporation decreases with wind speed.
- No effect of wind speed on evaporation.
- Evaporation decreases if wind speed is greater than 20 km/hr.
- Q21. The wet clothes take a long time to dry when the humidity of air is high.
- True
- False
- Q22. When a liquid freezes to form a solid, it absorbs heat.
- True
- False
- Q23. Liquids are called fluids because
- Liquids can flow.
- Particles of a liquid have spaces between them.
- Liquids do not fill the whole container in which they are placed.
- Particles of liquid have no force of attraction between them.
- Q24. Which of the following states of matter is easily compressible?
- Solids
- Liquids
- Gases
- Plasma
- Q25. Which of the following is a characteristic property of the particles of matter?
- Particles of matter are static.
- Particles of matter have spaces between them.
- Particles of matter have no force of attraction between them.
- Particles of matter have no spaces between them.
- Q26. What happens when we make tea, coffee or lemonade?
- Particles of one type of matter form a layer over another type of matter.
- Particles of one type of matter do not get mixed up with particles of other type of matter.
- Particles of one type of matter get into the spaces of the other type of matter.
- Particles of one type of matter form a covering around the particles of other type of matter.
- Q27. How does the state of matter change during the fusion process?
- Gas changes to solid.
- Liquid changes to gas.
- Solid changes to liquid.
- Gas changes to liquid.
- Q28. The temperature at which a liquid changes into its gaseous form is called
- melting point
- boiling point
- freezing point
- triple point
- Q29. The newly discovered fifth state of matter is called
- Bose-Einstein condensate
- Cornell and Wieman condensate
- Brownian state
- Bohr-Einstein condensate
- Q30. Which phenomenon occurs during drying of wet clothes?
- Transpiration
- Evaporation
- Freezing
- Condensation
- Get link
- X
- Other Apps
- Get link
- X
- Other Apps
Comments
Post a Comment