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Class 9 Science
Matter In Our Surroundings
Quiz 3
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The process involving the change of state from solid to gas is called
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boiling
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sublimation
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fusion
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melting
Which is incorrect statement:
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In solid state interparticles space (i.e., empty space) is minimum.
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Matter is continuous in nature
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The density of solid is generally more than that of a liquid.
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Of the three state of matter, the one that is most compact is solid state.
All gases will occupy zero volume when the temperature is reduced to:
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2730C
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00C
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-2730C
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2370C
What is the term used to describe the phase change of a liquid to a gas?
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Melting
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Boiling
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None of the above
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Condensation
Which of these choices will not change the state of matter?
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Temperature
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Heat
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Crushing a crystal
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Pressure
Out of the following which is the densest state of matter?
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Solids
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Liquids
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Plasmas
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Gases
The liquid which has the highest rate of evaporation is:
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Petrol
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Water
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Alcohol
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Nail- polish remover
In which phenomena water changes into water vapor below its B.P.?
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Boiling
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Evaporation
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No such phenomena exist
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Condensation
The boiling point of alcohol is \(78^{\circ}\)C. What is this temperature in Kelvin scale:
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373 K
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375 K
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351 K
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78 K
The state of matter which consists of super energetic particles in the form of ionized gases is called:
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Gaseous state
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Bose- Einstein condensate
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Liquid state
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Plasma state
In which phase of matter would you expect compound (alcohol exists) at room temperature?
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Gas
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Liquid
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Solid
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Plasma
Volume of a gas at a particular temperature and on atmospheric pressure is 200 ml. Keeping the temperature constant if pressure is increased to 5 atmosphere, then volume of the gas will be:
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200 ml
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100 ml
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40 ml
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205 ml
The change of a liquid into vapor is called:
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None of these
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Vaporization
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Sublimation
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Solidification
A gas can be compressed to a fraction of its volume. The same volume of a gas can be spread all over a room. The reason for this is that:
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The volume occupied by molecules of a gas is negligible as compared to the total volume of the gas.
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None of these
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Gases consists of molecules having very large inter- molecular space which can be reduced or increased under ordinary conditions
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Gases consists of molecules which are in a state of random motion
A gas which obeys the gas laws is known as:
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A real gas
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An ideal gas
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A heavier gas
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A lighter gas
The quantity of matter present in an object is called its
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mass
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weight
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density
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gram
What s the term used to describe the phase change as a liquid becomes a solid?
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None of the above
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Condensation
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Evaporation
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Freezing
Which of the following statements best explains why a closed balloon filled with helium gas rises in air?
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Helium is a monatomic gas, whereas nearly all the molecules that make up air, such as nitrogen and oxygen, are diatomic.
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Because helium has a lower molar mass than the average air molecules, the helium atoms are in faster motion. This means that the temperature. Hot gases tend to rise.
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The average speed of helium atoms is higher than the average speeds of air molecules, and the higher speed of collisions with the balloon walls propels the balloon upward.
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Because the helium atoms are of lower mass than the average is molecules, the helium gas is less dense than air. The balloon thus weighs less than the air displaces by its volume.
If you leave water in a glass and some molecules turn into a gas, it is called:
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Condensation
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Solidification
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Extinction
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Evaporation
Which has the least energetic molecules?
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Solids
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Plasmas
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Gases
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Liquids
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