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WorksheetsMatter in Our Surroundings_Class IX
Total questions: 13
Worksheet time: 10mins
Which of the following gas would diffuse fastest among them all?
Hydrogen
Oxygen
Nitrogen
Helium
Which of the following is not a fluid at room temperature?
Water
Oil
Oxygen
None
On increasing pressure, while keeping the temperature constant, the density of a gas will
decrease
increase
remain constant
can't predict
In a closed container filled of helium gas - consider any point within the container. Identify the correct statement:
gas would exert more pressure above that point
gas would exert more pressure below that point
gas would exert more pressure sideways to that point
gas would exert equal pressure in all directions at that point
At same temperature and wind speed on any day, where would you expect your clothes to dry faster?
Mumbai
Chennai
Calcutta
Jaipur
At what temperature, the density of water will be highest?
00 C
40 C
80 C
120 C
1 atm =
100, 000 Pa
101, 325 Pa
1 bar
50, 000 Pa
At higher altitudes
boiling point of water increases
boiling point of water decreases
No change in boiling point
None
The temperature at triple point of water is
373.16 K
273.160 F
273.16 K
373.160 F
The method for separation of mixture of common salt and ammonium chloride is
Fractional distillation
Chromatography
Sublimation
Crystallization
Latent heat of vaporization of water is
2.26 x 102 J/kg
2.26 x 106 J/kg
3.34 x 105 J/kg
3.34 x 102 J/kg
Latent heat of fusion of ice is
3.34 x 105 J/kg
3.34 x 102 J/kg
2.26 x 106 J/kg
2.26 x 102 J/kg
When water particles condenses on air on dust, it forms:
Mist
Fog
Frost
Vapour
