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 5 of 18
- A. One Molal NaCI
- B. One molal KCI solution
- C. One molal CaCI2
- D. One molal urea solution
Explanation: Freezing-point depression is proportional to the number of dissolved particles, ΔTf = iKf m.
Correct answer: One molal CaCI2- A. Molarity
- B. Molality
- C. More fraction of solvent
- D. Mole fraction of solute
Explanation: The molal boiling-point constant is defined by ΔTb = Kb m, so Kb = ΔTb / m, where m is molality in mol kg−1.
Correct answer: Molality- A. Na2SO4
- B. AlCl3
- C. CuSO4
- D. NH4Cl
Explanation: In the usual school-level approximation, Na2SO4 is treated as a salt of a strong acid and strong base, so its ions do not appreciably…
Correct answer: Na2SO4- A. basic
- B. acidic
- C. neutral
- D. cannot be presicted without data
Explanation: At the usual introductory level, Na2SO4 is considered to come from a strong acid and a strong base, so its solution is treated as neutral.
Correct answer: neutral- A. Beckmanns method
- B. Landsbergers method
- C. Linds method
- D. none of the above
Explanation: The Landsberger method is used to determine the elevation of boiling point by comparing the boiling behaviour of a solution with that of…
Correct answer: Landsbergers method- A. saturated solutions of each liquid
- B. unsaturated solutions of each liquid
- C. normal solution of each liquid
- D. no layer formation takes place
Explanation: In a partially miscible liquid pair, each layer contains as much of the other liquid as it can dissolve at that temperature, so both…
Correct answer: saturated solutions of each liquid- A. Super saturated solution
- B. unsaturated solution
- C. saturated solution
- D. dilute solution
Explanation: A saturated solution contains the maximum amount of solute that can dissolve at a specified temperature, so adding more solute will not…
Correct answer: saturated solution- A. solution
- B. compound
- C. radical
- D. ion
Explanation: A solution is a homogeneous mixture in which one or more solutes are uniformly distributed in a solvent, so its composition is the same…
Correct answer: solution- A. Non-electrolye solute
- B. Non-volatile solute
- C. Dilute solution
- D. All of the above
Explanation: In the usual introductory treatment, colligative-property calculations use a dilute solution containing a non-volatile, non-electrolyte…
Correct answer: All of the above- A. Opals
- B. Dust particles in smoke
- C. Paints
- D. Fog
Explanation: Fog is an aerosol consisting of tiny liquid water droplets dispersed in a gas, so it is a liquid-in-gas colloidal system.
Correct answer: Fog- A. 5 to 200 kg
- B. 20-200 kg
- C. 200-400 kg
- D. 30-400 kg
Explanation: Macronutrients such as nitrogen, phosphorus and potassium are required in relatively large amounts, commonly about 5 to 200 kg per acre…
Correct answer: 5 to 200 kg92. The percentage of suspended solid waste in raw water is removed by coagulation is__________________?
- A. 60
- B. 70
- C. 80
- D. 90Hiring An Environmental Sustainability Consultant
Explanation: Coagulation destabilises colloidal particles so they join into larger flocs that settle or are filtered, and conventional treatment…
Correct answer: 80- 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 contact97. 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 solvent