Matter in our Surroundings

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Matter in our Surroundings - 01

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Q1. Which one will help to accelerate the process of evaporation of a liquid kept in an open china dish? *

1 分

Keeping dish in open

Keeping the dish under a running fan

Blowing air into the liquid

All the above

Q2. When a gas is compressed keeping temperature constant. It results in *

1 分

Decrease in collision among gaseous molecules

Decrease in speed of gaseous molecules

None of the above

Increase in collision among gaseous molecules

Q3. Pressure of air at sea level is *

1 分

76 cm of Hg

760 mm of Hg

One atmosphere

All are correct

Q4. Zig-zag movement of the solute particle in a solution is known as *

1 分

Curved motion

Linear motion

Circular motion

Brownian motion

Q5. Gases can be liquefied by *

1 分

decreasing pressure

both (a) and (b)

(a) increasing pressure

(b) decreasing temperature

Q6. Density of a substance is defined as *

1 分

ratio of mass and volume

product of mass and temperature

product of mass and volume

ratio of mass and temperature

Q7. Which is more effective in cooling? *

1 分

Water at 273 K

Ice at 373K

Water at 373K

Ice at 273K

Q8. 0 ° C temperature is equal to *

1 分

-273 K

0 K

273 K

300 K

Q9. The process involving the change of state from solid to gas is called *

1 分

melting

boiling

sublimation

fusion

Q10. 273 K = ? °C *

1 分

0°C

100°C

546°C

45°C

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