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- 1. Multiple Choice
Which of the following is most suitable for summer?
Cotton
Nylon
Polyester
Silk
- 2. Multiple Choice
On heating, a solid is converted to liquid. This change is called
Melting
Fusion
Diffusion
Freezing
- 3. Multiple Choice
Seema visited a Natural Gas Compressing Unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions
Low temperature, low pressure
High temperature, low pressure
Low temperature, high pressure
High temperature, high pressure
- 4. Multiple Choice
The property to flow is unique to fluids. Which one of the following statements is correct?
Only gases behave like fluids
Gases and solids behave like fluids
Gases and liquids behave like fluids
Only liquids are fluids
- 5. Multiple Choice
Which of the following is not a characteristic of matter?
Matter is made up of extremely small particles
There is no space between particles of matter
The particles of matter are continuously moving
The particles of matter attract each other.
- 6. Multiple Choice
During summer, water kept in earthen pot becomes cool due to phenomenon of
Diffusion
Transpiration
Distillation
Evaporation
- 7. 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
- 8. Multiple Choice
solidified carbon dioxide is an example of which process
sublimation
fusion
evaporation
condensation
- 9. Multiple Choice
when water changes its state from liquid to gas when in sunlight this is called
condensation
vapourisation
evaporation
boiling
- 10. Fill in the Blank
the magnitude of temperature at which matter changes its state from liquid to gas is called ________.
- 11. Poll
density of which substance will be higher?
soap liquid
water
oil
honey
- 12. Open Ended
why steam causes more severe burns than boiling water?
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