EASY
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Physical state of water at 0°C is

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Important Questions on Matter in our Surroundings

MEDIUM
Science>Chemistry>Matter in our Surroundings>States of Matter

When does ice melt at the same temperature 0°C(273 Kelvin), which one of the following has more energy?

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Science>Chemistry>Matter in our Surroundings>States of Matter
Which gas boils out first during fractional distillation of air.
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Science>Chemistry>Matter in our Surroundings>States of Matter
Which of the following does not undergo sublimation?
MEDIUM
Science>Chemistry>Matter in our Surroundings>States of Matter
Dry ice is
HARD
Science>Chemistry>Matter in our Surroundings>States of Matter
The melting point of naphthalene is 80°C and the room temperature is 30°C. A sample of liquid naphthalene at 100°C is cooled down to the room temperature. Draw a temperature time graph to represent this cooling. In the graph, mark the region which corresponds to the freezing process.
MEDIUM
Science>Chemistry>Matter in our Surroundings>States of Matter
Which of the following curves best represents the variation in density of water with temperature?
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Science>Chemistry>Matter in our Surroundings>States of Matter
Latent heat of vaporisation is 
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Science>Chemistry>Matter in our Surroundings>States of Matter
Which of the following is not a pollutant?
EASY
Science>Chemistry>Matter in our Surroundings>States of Matter
"Complete melting of ice cream will not happen suddenly". Explain.
EASY
Science>Chemistry>Matter in our Surroundings>States of Matter
Which of the following compound can not be sublimed?
MEDIUM
Science>Chemistry>Matter in our Surroundings>States of Matter
The following statements apply to SO2 but NOT to H2S:
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Science>Chemistry>Matter in our Surroundings>States of Matter
The correct order of compressibility is:
EASY
Science>Chemistry>Matter in our Surroundings>States of Matter
The melting point of ice is _____.
MEDIUM
Science>Chemistry>Matter in our Surroundings>States of Matter
Useful substance in preparation of freezing mixture is 
MEDIUM
Science>Chemistry>Matter in our Surroundings>States of Matter
If a gas expands at constant temperature it indicates that
EASY
Science>Chemistry>Matter in our Surroundings>States of Matter
Gases possess low density.
HARD
Science>Chemistry>Matter in our Surroundings>States of Matter
Comment upon the following: rigidity, compressibility, fluidity, filling a gas container, shape, kinetic energy and density of various states of matter.
EASY
Science>Chemistry>Matter in our Surroundings>States of Matter
The particles in a solid diffuse into one another.
HARD
Science>Chemistry>Matter in our Surroundings>States of Matter
In which of the following conditions, the distance between the molecules of H2 gas would increase?
i. Adding more H2 gas to the container without increasing the volume of the container
ii. Increasing the volume of the container of H2 gas
iii. Some H2 gas leaking out of the container
iv. Increasing pressure on H2 gas contained in a closed container
EASY
Science>Chemistry>Matter in our Surroundings>States of Matter

Which of the following is not a solid?