Free Properties of Liquids MCQs with Answers
145 Properties of Liquids MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Liquid behavior depends on intermolecular forces, which produce surface tension, viscosity, capillary action and a definite volume without a fixed shape. The topic also covers vapor pressure, evaporation, boiling point and the effect of temperature and external pressure, while distinguishing evaporation at the surface from boiling throughout the liquid.
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145 questions · page 3 of 8
- A. oceans
- B. glaciers & icecaps
- C. fresh water lakes and ponds
- D. All have equal distribution
Explanation: Oceans contain about 97% of the Earth's water, so they make up the bulk of the hydrosphere.
Correct answer: oceans- A. alum
- B. nickel sulphate
- C. copper sulphate
- D. barium sulphate
Explanation: Alum acts as a coagulant: it forms gelatinous aluminium hydroxide in water, which traps and settles suspended impurities.
Correct answer: alum- A. Hydrogen bonding
- B. Vander Waals force
- C. Forces among the polar molecules
- D. Ionic bond
Explanation: Van der Waals forces, especially London dispersion forces, are the weakest listed intermolecular attractions.
Correct answer: Vander Waals force- A. Length of contact
- B. Volume of contact
- C. Area of contact
- D. all of above
Explanation: Shaking two immiscible liquids breaks one liquid into smaller droplets, increasing the total area of contact between the two phases.
Correct answer: Area of contact45. The solvent or mixture of solvents used for separation of compounds is called____________________?
- A. Stationary phase
- B. Mobile phase
- C. Dynamic phase
- D. Static phase
Explanation: In chromatography, the solvent or solvent mixture that moves through the system and carries the sample is the mobile phase.
Correct answer: Mobile phase- A. Mobile phase
- B. Stationary phase
- C. Mixed phase
- D. Single phase
Explanation: Silica gel and alumina are polar solid adsorbents that remain fixed in column or thin-layer chromatography, so they act as the stationary…
Correct answer: Stationary phase- A. Crystallization
- B. Sublimation
- C. Solvent extraction
- D. Filtration
Explanation: Solvent extraction is governed by the distribution law: at equilibrium, a solute distributes between two immiscible solvents in a constant…
Correct answer: Solvent extraction- A. Polar solvent used
- B. Combination of solvents used
- C. Their different distribution coefficients in the solvent
- D. Distributive law
Explanation: In chromatography, each component partitions differently between the stationary phase and the moving solvent, giving it a different…
Correct answer: Their different distribution coefficients in the solvent49. In solvent extraction ether is used to separate products of organic synthesis from________________?
- A. water
- B. iodine
- C. hydrochloric acid
- D. gases
Explanation: Ether is immiscible with water and dissolves many organic products, so the organic products can be transferred into the ether layer and…
Correct answer: water- A. Red colour
- B. Purple colour
- C. Blue colour
- D. Yellow colour
Explanation: Iodine dissolves in non-polar carbon tetrachloride, CCl4, to form a violet or purple solution because the molecular iodine absorbs visible…
Correct answer: Purple colour- A. Retardation factor
- B. Distribution co-efficient
- C. Distribution in aqueous solution
- D. All statements are wrong
Explanation: The distribution coefficient is the ratio of a solute's concentration, or amount under specified conditions, in two immiscible solvents…
Correct answer: Distribution co-efficient- A. Insoluble particles
- B. residue
- C. crystals
- D. mud
Explanation: In filtration, the liquid passes through the filter while the insoluble solid retained on the filter paper is called the residue.
Correct answer: residue- A. Adsorption chromatography
- B. Ascending chromatography
- C. Radial chromatography
- D. Descending chromatography
Explanation: In ascending chromatography, the solvent is placed in a pool at the bottom and rises upward through the stationary phase by capillary…
Correct answer: Ascending chromatography- A. Filter hot solution
- B. Avoid premature crystallization
- C. Increase the rate of filtration
- D. Decrease the area
Explanation: The folds in fluted filter paper provide channels for air and increase the effective surface area, so liquid passes through more rapidly.
Correct answer: Increase the rate of filtration55. Which of the following technique is used for the separation of insoluble particles from liquids ?
- A. Filtration
- B. Crystallization
- C. Solvent extraction
- D. Chromatography
Explanation: Filtration separates an insoluble solid from a liquid because the liquid passes through the pores while the solid particles are retained.
Correct answer: Filtration- A. Shape
- B. Phase
- C. Mechanism
- D. All
Explanation: Chromatography can be classified by the shape or arrangement of the apparatus, by the phases involved, and by the separation mechanism.
Correct answer: All- A. Liquid do not have definite shape
- B. Liquid do not have definite volume
- C. Lieuid is highly compressible
- D. Liquid molecules can slide over each other
Explanation: Liquid particles are held together but can move and slide past one another, allowing the liquid to flow and take the container's shape.
Correct answer: Liquid molecules can slide over each other- A. Surface tension
- B. Cohesive forces
- C. Adhesive forces
- D. viscosity
Explanation: A wetting liquid rises because adhesive forces between the liquid and the capillary wall pull the liquid upward.
Correct answer: Adhesive forces- A. More strength of H-bonding
- B. More strength of London forces
- C. Less polarizability
- D. All of the above
Explanation: As the number of carbon atoms increases, the electron cloud becomes larger and more polarizable, strengthening London dispersion forces…
Correct answer: More strength of London forces- A. ionization
- B. condensation
- C. fusion
- D. evaporation
Explanation: During condensation, particles change from the gas state to the liquid state and move closer together, so the empty spaces between them…
Correct answer: condensation