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
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oxygen
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dissolved substances
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hydrogen
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too much salt
B
Correct answer
Explanation
Hard water is characterized by a high concentration of dissolved minerals, specifically calcium and magnesium ions.
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Dead burnt
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Iodide of millon's base
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Epsom salt
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Milk of magnesia
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Hydrolith
A
Correct answer
Explanation
This option is correct because when the plaster of paris are heated above 2000C the water molecule are lose and its converted in to anhydrous salt. these salt are called as dead burnt
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Bromine
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Chlorine
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Fluorine
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Iodine
A
Correct answer
Explanation
The only non-metal that is a liquid at room temperature and normal pressure is a halogen called bromine.
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it exists as solid, liquid or gas
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it contains hydrogen & oxygen
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it cannot be split up into simpler substances by chemicals means
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it contains two different elements joined by chemical bond
D
Correct answer
Explanation
A compound is a substance formed when two or more elements are chemically bonded together in a fixed ratio. Water (H2O) fits this definition.
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Evaporation
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Freezing
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Sublimation
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Melting
A
Correct answer
Explanation
Evaporation is the phase transition from liquid to gas that occurs at the surface of a liquid.
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Evaporation
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Freezing
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Sublimation
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Melting
D
Correct answer
Explanation
Melting is the phase transition where a substance changes from a solid state to a liquid state upon heating. Evaporation is liquid to gas, and sublimation is solid to gas.
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Evaporation
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Freezing
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Sublimation
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Melting
C
Correct answer
Explanation
Sublimation is the process where a substance transitions directly from a solid phase to a gas phase without passing through the liquid phase. Examples include dry ice and iodine.
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Evaporation
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Freezing
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Sublimation
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Melting
B
Correct answer
Explanation
Freezing is the phase change where a liquid turns into a solid. This occurs when the temperature of the liquid is lowered below its freezing point.
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solid carbondioxide
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liquid nitrogen
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sodium hydroxide
A
Correct answer
Explanation
Dry ice is the solid form of carbon dioxide.
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Kerosene
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Water
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Petrol
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None of these
A
Correct answer
Explanation
Sodium is a highly reactive alkali metal that reacts violently with water and oxygen in the air; therefore, it is stored in kerosene to prevent contact with these substances.
A
Correct answer
Explanation
Water vapour is the gaseous state of water. It occurs when water evaporates or boils.
B
Correct answer
Explanation
A molecule of Plaster of Paris contains two molecules of water of crystallisation. Plaster of Paris is known as calcium sulphate.
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melting
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boiling
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evaporization
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sublimation
C
Correct answer
Explanation
The phase transition from liquid to gas is called evaporation or vaporization. Boiling is a specific type of rapid evaporation occurring at the boiling point, but the general term is vaporization.
B
Correct answer
Explanation
Liquids have a definite volume because their particles are close together, but they lack a definite shape because the particles can slide past one another, allowing the liquid to take the shape of its container.
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Three forms
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Two forms
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Five forms
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No form
A
Correct answer
Explanation
It exists as Solid , Liquid and gases.