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 4 of 8
- 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 extraction68. 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- A. molecules become more disordered.
- B. K.E of the molecules decreases
- C. intermolecular forces become weaker.
- D. molecules move more frequently.
Explanation: During melting, the particles absorb heat, so their average kinetic energy increases rather than decreases.
Correct answer: K.E of the molecules decreases- A. Methanol > Ethanol
- B. Methanol < Ethanol
- C. Methanol = Ethanol
- D. None of these
Explanation: The boiling point of alcohols increases as the size of the alcohol molecule increases.
Correct answer: Methanol < Ethanol- A. Joule
- B. N/m2
- C. Dynes/cm
- D. Poise
- E. Ergs
Explanation: The cgs unit of viscosity is poise (P) whereas the SI unit of viscosity is newton-second per square meter, which is usually expressed as…
Correct answer: Poise- A. High electronegativity of S
- B. Greater size of SO2
- C. SO2 is polar and CO2 is non-polar
- D. SO2 is more acidic than CO2
Explanation: More polar molecules tend to form strong intermolecular forces which require a significant amount of heat to be overcome hence SO2 has a…
Correct answer: SO2 is polar and CO2 is non-polar- A. Density
- B. Pressure
- C. Viscosity
- D. All
Explanation: Matter changes from one state to another by change in temperature and pressure. For e.g.
Correct answer: Pressure- A. ammonia
- B. water
- C. kerosene oil
- D. HCl
Explanation: London forces are present in kerosene oil. The London dispersion force is caused by random and temporary changes in the polarity of atoms…
Correct answer: kerosene oil- A. smaller, closer
- B. greater, closer
- C. smaller, far away
- D. greater, far away
Explanation: The densities of liquids are much greater than gases but closer to solids.
Correct answer: greater, closer- A. boiling
- B. freezing
- C. clearing
- D. all of these
Explanation: So, a liquid crystalline state exists between two temperatures i.e. melting temperature and clearing temperature.
Correct answer: clearing- A. 123°C
- B. 135°C
- C. 145°C
- D. 179°C
Explanation: When heated, the cholesteryl Benzoate melts at 145°C to form a milky liquid, and at 179°C, the milky liquid suddenly becomes clear.
Correct answer: 145°C- A. Anisotropic liquids
- B. Nematic liquids
- C. Isotropic liquids
- D. Liquids
Explanation: Liquid crystals are a state of matter intermediate between that of a crystalline solid and liquid.
Correct answer: Liquids- A. Atoms of helium in gaseous state at high temperature
- B. Molecules of water
- C. Molecules of solid iodine
- D. Molecules of HCl gas
Explanation: Option A: Atoms of helium in the gaseous state at high temperature: Helium (He) is a noble gas that exists as individual atoms in the…
Correct answer: Atoms of helium in gaseous state at high temperature- A. Ionic compounds
- B. Solids
- C. Covalent compounds
- D. Liquids
Explanation: The intermolecular distance is larger in liquids. Molecules of liquid have very less force of attraction between them.OPTION A: Ionic…
Correct answer: Liquids