Free Liquids MCQs with Answers
350 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 properties arise from intermolecular attractions, including surface tension, viscosity, cohesion and adhesion. The topic links evaporation, vapour pressure and boiling point with temperature, explains hydrogen bonding, and covers water's unusual expansion on freezing and its density maximum, which distinguish water from ordinary liquids.
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350 questions · page 6 of 18
101. 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 filtration107. 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- A. Dipole-dipole forces
- B. Ion dipole-dipole forces
- C. London dispersion forces
- D. Debye forces
Explanation: Dipole-dipole forces are attractions between the partial positive end of one polar molecule and the partial negative end of another polar…
Correct answer: Dipole-dipole forces- A. intramolecular
- B. intermolecular
- C. van der Waal
- D. Dipole-induced dipole
Explanation: Van der Waals forces are weak intermolecular attractions that can occur between all atoms and molecules, including non-polar species.
Correct answer: van der Waal- A. William Crooks
- B. Fredrack Reinitzer
- C. J.J Thomson
- D. Bravis
Explanation: Friedrich Reinitzer discovered liquid crystals in 1888 while studying cholesteryl compounds that showed two melting transitions.
Correct answer: Fredrack Reinitzer- A. Molecules become more disordered
- B. K.E of the molecules decreases
- C. Intermolecular forces become weaker
- D. Molecule become further separated
Explanation: During melting, molecules become more disordered, move somewhat farther apart, and experience weaker intermolecular attractions.
Correct answer: K.E of the molecules decreases- A. Hydrogen (H2)
- B. Chlorine (Cl2)
- C. lodine (I2)
- D. Methane (CH4)
Explanation: Iodine molecules have the largest electron cloud among the listed substances, so they are most polarizable and experience the strongest…
Correct answer: lodine (I2)- A. 5.85% NaCl Solution
- B. 18.0 % glucose solution
- C. 6.0 % urea solution
- D. All have same boiling point
Explanation: Boiling-point elevation depends on the number of dissolved particles. For 100 g of solution, NaCl gives about 0.100 mol ÷ 0.09415 kg =…
Correct answer: 5.85% NaCl Solution- A. Sublimation
- B. Crystallisation
- C. Solvent extraction
- D. Distillation
Explanation: Distribution law describes how a solute distributes itself between two immiscible solvents, and this principle is used in solvent…
Correct answer: Solvent extraction120. The use of antifreeze in the automobile radiator is an important application of__________________?
- A. constitutive property
- B. additive property
- C. colligative property
- D. intrinsic property
Explanation: Antifreeze lowers the freezing point and raises the boiling point of the radiator liquid because these effects depend on the number of…
Correct answer: colligative property