Chemistry ยท Science General
States of Matter
2,382 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
A
Correct answer
Explanation
Ice is the solid form of water, where molecules are locked into a rigid crystalline structure.
D
Correct answer
Explanation
Plasma is a state of matter consisting of a gas-like mixture of free electrons and positive ions.
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Heat of condensation
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Heat of evaporation
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Heat of fusion
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Heat of vaporization
D
Correct answer
Explanation
The heat of vaporization is the amount of energy required to change a substance from a liquid to a gas at its boiling point.
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Freezing
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deposition
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evaporation
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condensation
C
Correct answer
Explanation
Evaporation is an endothermic process, meaning it requires an input of thermal energy to overcome the intermolecular forces holding the liquid molecules together.
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freezing
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boiling
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melting
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mass
C
Correct answer
Explanation
The melting point is the specific temperature at which a solid transitions into a liquid state.
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more slowly
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more quickly
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in the same way
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more quickly and farther
A
Correct answer
Explanation
Particles in a solid have lower kinetic energy and are restricted to vibrating in fixed positions, whereas gas particles move rapidly and freely.
C
Correct answer
Explanation
Gases consist of particles that are far apart and move randomly, allowing them to expand to fill any container.
B
Correct answer
Explanation
Liquids have a definite volume because the particles are close together, but they lack a definite shape because the particles can slide past one another.
A
Correct answer
Explanation
Solids have particles held in fixed positions, giving them both a definite shape and a definite volume.
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heat of condensation
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heat of evaporation
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heat of fusion
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Heat of vaporization
C
Correct answer
Explanation
The heat of fusion is the energy required to change a substance from a solid to a liquid at its melting point.
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freezing
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boiling
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melting
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condensation
B
Correct answer
Explanation
Boiling is the process where a liquid changes to a gas throughout the substance at a specific temperature.
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vibration of individual particles will decrease
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changes the state - gas to liquid: liquid to solid
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decreases the kinetic energy of the particles
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changes the state - liquid to gas or solid to liquid
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condensation
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boiling
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melting
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freezing
C
Correct answer
Explanation
Melting is the phase transition where a solid gains enough thermal energy to overcome the forces holding it in a rigid structure, turning it into a liquid.
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melting
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freezing
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condensation
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boiling
C
Correct answer
Explanation
Condensation occurs when gas particles lose kinetic energy and slow down enough for intermolecular forces to pull them together into a liquid state.
A
Correct answer
Explanation
A liquid has a fixed volume because the particles are close together, but it lacks a fixed shape because the particles can slide past one another.