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 13 of 18
- A. Motion of liquid molecules
- B. Intermolecular forces between the molecules
- C. Kinetic energy of the molecules
- D. Mass of the molecules
Explanation: When the kinetic energy of molecules becomes maximum, a stage comes when the temperature is no longer increased and this heat energy is…
Correct answer: Intermolecular forces between the molecules- A. Gases to liquids
- B. Liquids to solids
- C. Both A & B
- D. None of these
Explanation: London forces are directly related to the mass of the molecules. So the attractive force between higher hydrocarbons is more.
Correct answer: Both A & B- A. Chemical properties
- B. Physical properties
- C. Composition
- D. Nature
Explanation: The strength of the intermolecular forces determines the physical properties of the substance such as their state at room temperature…
Correct answer: Physical properties- A. Electrons
- B. Electronic cloud
- C. Lone pair on an atom
- D. Poles of atoms
Explanation: Option B is correct since the London dispersion force is a temporary attractive force that results when the electrons in two adjacent…
Correct answer: Electronic cloud- A. NH3.
- B. H2O.
- C. HF.
- D. CH4.
Explanation: Methane (CH4) has the least polarizability of these molecules because it is a nonpolar molecule.
Correct answer: CH4.- A. Chemical bond
- B. Intramolecular force
- C. Van der Waal forces
- D. Strong forces
Explanation: The intermolecular forces are typically referred to as Van der Waals forces.
Correct answer: Van der Waal forces- A. Higher ∆H weaker intermolecular forces
- B. Higher ∆H, higher intermolecular forces
- C. Lower ∆H, higher intermolecular forces
- D. None of these
Explanation: Option B is the correct answer. The correct relation between ΔH (enthalpy change) and intermolecular force is: higher ΔH corresponds to…
Correct answer: Higher ∆H, higher intermolecular forces- A. -188.1
- B. 188.1
- C. -184.4
- D. 184.4
Explanation: Polarizability increases with increase in atomic and molecular size, among halogens fluorine has less polarizability so it boils at…
Correct answer: -188.1- A. Strong London forces in ethane due to smaller size.
- B. Weak London forces in hexane due to larger size.
- C. Strong London forces in hexane, due smaller size.
- D. Strong london forces in hexane due to larger size.
Explanation: The reason for this is that ethane has weaker intermolecular forces (van der Waals forces) compared to hexane due to its smaller size.
Correct answer: Strong london forces in hexane due to larger size.- A. Lesser - closer
- B. Greater - closer
- C. Smaller - greater
- D. Lesser - greater
Explanation: Option B is the most appropriate answer, the density of liquids are greater than gasses but are closer to solids.
Correct answer: Greater - closer- A. Alcohol and water
- B. Alcohol and ether
- C. Water and ether
- D. Carbon disulphide and water
Explanation: CS2 Insoluble in water and more dense (10.5 lb / gal) than water. Hence sinks in water.
Correct answer: Carbon disulphide and water- A. 10 ml
- B. 14 ml
- C. 16 ml
- D. 22.4 ml
Explanation: Following is the solution of this problem:
Correct answer: 16 ml- A. Dipole-dipole and London dispersion forces
- B. Dipole induced dipole forces
- C. Dipole-dipole forces
- D. Hydrogen bonding
Explanation: Chloroform exhibits both dipole-dipole forces (between the positive end of one molecule and the negative end of another) due to its polar…
Correct answer: Dipole-dipole and London dispersion forces- A. NH3
- B. Br2
- C. CHCl3
- D. Xe
Explanation: NH₃ is a polar molecule capable of forming hydrogen bonds due to the presence of a hydrogen atom bonded to a highly electronegative…
Correct answer: NH3- A. The molecules of liquid are in constant motion by sliding over each other
- B. The intermolecular forces of liquids are weaker than gases
- C. The liquid molecules have kinetic energy less than solids
- D. All statements are correct
Explanation: In liquids, the molecules are in constant motion, which allows them to flow and adapt to the shape of their container.
Correct answer: The molecules of liquid are in constant motion by sliding over each other- A. Very high heat of vaporization
- B. Very low boiling point
- C. Very low heat of vaporization
- D. All are correct
Explanation: Strong dipole-dipole forces among liquid molecules require a significant amount of energy to overcome when transitioning from the liquid…
Correct answer: Very high heat of vaporization- A. Liquid do not have definite shape
- B. Liquid do not have definite volume
- C. Liquid is highly compressible
- D. Liquid molecules can slide over each other
Explanation: Due to presence of random motion liquid has no definite shape.
Correct answer: Liquid do not have definite shape- A. Decreasing
- B. Increasing
- C. Constant
- D. Can not be predicted
Explanation: Across the short periods, the melting and boiling points of elements increase with the number of valence electrons upto group IVA and then…
Correct answer: Increasing- A. F2
- B. Br2
- C. Cl2
- D. I2
- E. He
Explanation: The correct answer is Option E: He. Helium is a noble gas characterized by its minimal atomic size and the lowest number of electrons…
Correct answer: He- A. Hs > Hv > Hf
- B. Hs = Hf = Hv
- C. Hs < Hf < Hv
- D. None
Explanation: The correct order of enthalpies is: Hs > Hv > Hf. Enthalpy of sublimation (Hs) involves both breaking the intermolecular forces from solid…
Correct answer: Hs > Hv > Hf