Chemistry · Science General
States of Matter
2,682 Questions
States of matter questions explore physical changes, evaporation, phase transitions, and the properties of liquids and gases. Topics cover density, cryosurgery, heavy water, and electrolytes. This foundational chemistry topic frequently appears in general science sections of SSC and railway exams.
Phase change mechanismsEvaporation and temperature effectsProperties of liquidsPhysical versus chemical changesElectrolytes and heavy water
States of Matter Questions
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Benzene
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Sodium chloride
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Acetone
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Ethylene glycol
D
Correct answer
Explanation
Ethylene glycol is the primary component in automotive antifreeze because it effectively lowers the freezing point of water. Sodium chloride is corrosive, and the others are not used for this specific purpose.
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water
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mercury
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carbon dioxide
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air
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milk
B
Correct answer
Explanation
This is the correct option. Convection cannot take place in mercury. Mercury gets heated by conduction and not by convection, as it is a very good conductor of heat.
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Benzene
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Sodium chloride
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Acetone
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Ethylene glycol
D
Correct answer
Explanation
Ethylene glycol is the primary component of most automotive antifreeze because it effectively lowers the freezing point and raises the boiling point of water.
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multimolecular colloids
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Lyphobic colloids
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Lyophilic colloids
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Associated colloids
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None of these
A
Correct answer
Explanation
This option is correct. When the colloidal particles are made of aggregates of atom or molecules with molecular size less than 10-7 cm, they are known as multimolecular colloids.
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It is because of latent heat of condensation.
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It is because of latent heat of fusion to melt.
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It is because of latent heat of convection.
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It is because of latent heat of vaporisation.
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It is because of latent heat of steam.
B
Correct answer
Explanation
Latent heat of water is very high. That is, ice cream melts faster than ice. Technically, ice cream absorbs heat faster than ice. if you place your hand in ice cream it absorbs heat from your hand faster. This makes us feel ice cream is colder than ice.
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Latent heat of vaporisation
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Convection
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Latent heat of fusion
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Thermal expansion
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Radiation
A
Correct answer
Explanation
The amount of heat required to change 1 kg substance from liquid to vapour state without change of temperature is called latent heat of vaporisation.
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Melting point
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Curie point
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Boiling point
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Freezing point
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Dew point
D
Correct answer
Explanation
Liquids have a characteristic temperature at which they turn into solids, known as their freezing point.
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the material in which pipes are made contracts due to cold and so it burst
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water in the pipes freezes and on freezing water expands, so pipes burst
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burst makes the pipes rusty, so they break
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None of these
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Melting of wax and burning of wax
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Ripening of bananas
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Burning of paper
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Setting of curd
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Melting of ice
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Melting of ice
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Melting of wax
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Beating of aluminium to make aluminium foil
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Formation of steam from water
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All of the above
E
Correct answer
Explanation
This is the correct option. All above examples are physical changes.
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Only a
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Only b
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Only c
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Both b and c
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Only d
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The changing of water to steam
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The melting of ice
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The burning of kerosene
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Freezing of water
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Folding of paper
C
Correct answer
Explanation
This is the correct answer, because after burning we get new substance.
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Only a
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Only b
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Only c
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Only d
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Both b and c
E
Correct answer
Explanation
This is the correct answer, as a new substance is formed in both cases.
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Only a
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Only b
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Both a and b
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Only c
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Both b and c
D
Correct answer
Explanation
This is the correct answer, as this is the characterstic of physical change.
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remains unchanged
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increases with the amount of impurity
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decreases with the amount of impurity
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decreases and then increases
B
Correct answer
Explanation
Adding a non-volatile impurity to a solvent increases its boiling point, a phenomenon known as boiling point elevation.