Chemistry · 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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Evaporation
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condensation
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Washing
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Heating
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evaporation
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condensation
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Washing
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Heating
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water, oil, gas.
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oil, water, gas
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gas, oil, water
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water, gas, oil
A
Correct answer
Explanation
Due to differences in density, gas is the lightest and rises to the top, oil is in the middle, and water is the densest, settling at the bottom of the reservoir.
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Natural gas
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Iron
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Copper
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Petroleum
D
Correct answer
Explanation
Petroleum is used in the manufacture of detergents, fibres (polyester, nylon, acrylic, etc.), polythene and other man-made plastics. Due to its great commercial importance, petroleum is also called ‘black gold’.
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decreases
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increases
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remains constant
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increase only when the heat is too high
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None of these
A
Correct answer
Explanation
Surface tension of water decreases as temperature increases because the kinetic energy of the molecules increases, weakening the cohesive forces.
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Water
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Carbon dioxide
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Heat
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Urea
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Oxygen
E
Correct answer
Explanation
This is the correct option. Oxygen is not a waste product and it is not produced by the body.
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gas, oil, water
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water, oil, gas
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water, gas, oil
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oil, gas, water
B
Correct answer
Explanation
In an oil well, fluids separate based on density. Gas is the least dense and rises to the top, oil is in the middle, and water is the most dense, settling at the bottom.
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ice
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solid solution of sugar and ice
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sugar
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none of these
A
Correct answer
Explanation
When sugar is added to water and a mixture of these two is formed, it suffers from lowering in freezing point and the freezing point of water is lowered and hence the first solid which separates out is ice. It is one of the colligative properties of a solution which is subjected to a change by the addition of solute.
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lattice energy = hydration energy
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lattice energy < hydration energy
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lattice energy > hydration energy
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none of these
B
Correct answer
Explanation
If the lattice energy is less than the hydration energy, more heat is needed to be supplied in order to dissolve the salt in the solution.Hence it will be exothermic.
C
Correct answer
Explanation
Seawater is a mixture of both salt and water. The water is solvent and the salt is solute and they are fairly balanced out.
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Glucose
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Hydrochloric acid
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Ethyl alcohol
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None of these
B
Correct answer
Explanation
Hydrochloric acid conducts electricity due to formation of ions in the solution.
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Distilled water
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Diluted hydrochloric acid
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Diluted sulphuric acid
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None of these
A
Correct answer
Explanation
Distilled water does not conduct electricity as it does not contain ions.
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Distilled water
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Rain water
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Glucose solution
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None of these
B
Correct answer
Explanation
Rain water conducts electricity as it contain various ions.
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ceramics
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glass
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a & b
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None of these
C
Correct answer
Explanation
Acids are stored in containers made of ceramics and glass as they don't react with the acids.
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lower the specific heat of water
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lower he viscosity of water
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lower the freezing point of water
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improve the lubricity
C
Correct answer
Explanation
Glycerol acts as an antifreeze agent when added to water. It lowers the freezing point of the mixture, preventing the radiator water from freezing in cold climates.