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- 1. Multiple Choice
Which of the following phenomena always results in the cooling effect?
condensation
sublimation
crystallisation
evaporation
- 2. Multiple Choice
Which of the following cannot be considered a form of matter?
atom
water
cold
electron
- 3. Multiple Choice
Which of the following statement is correct?
Materials existing as liquids at room temperature have their melting and boiling points lower than that of room temperature.
The phenomenon involving the transition of a substance from solid to liquid state is called sublimation.
To convert a temperature on the Celsius scale to Kelvin scale, subtract 273 from the given temperature
The density of ice is less than that of water.
- 4. 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
- 5. Multiple Choice
When water at 0°C freezes to form ice at the same temperature of 0°C, then it
Absorbs some heat
Releases some heat
Neither absorbs nor releases heat
Absorbs exactly 3.34 x 105J/kg of heat
- 6. Multiple Choice
In which state of matter , process of diffusion is fastest?
Liquids
Gases
Solids
Semi - solids
- 7. Multiple Choice
During summer, water kept in an earthen pot becomes cool because of the phenomenon of:
diffusion
transpiration
osmosis
evaporation
- 8. Multiple Choice
On which factors evaporation does not depend
Humidity
Temperature
Surface area
Quality of matter
- 9. Multiple Choice
when 2-3 crystals of potassium permanganate are dissolved in water, the colour of water will be
blue
green
yellow
purple pink
- 10. Multiple Choice
The fifth state of matter is given by?
Subhash Chandra Bose
Albert Einstein
Satyendra Nath Bose
Both Satyendra Bose and Einstein
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