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 17 of 18
- A. I + IV
- B. II + IV
- C. III + IV + V
- D. I + II + III
Explanation: Hydrogen bonding is found between the hydrogen atom of one molecule (which is covalently bonded to an electronegative atom) and the…
Correct answer: III + IV + V- A. Ammonia
- B. Ethyl alcohol
- C. Carboxylic acids
- D. Hydrocarbon
Explanation: Hydrocarbons, which include alkanes, alkenes, and alkynes, do not form hydrogen bonds because they consist solely of carbon and hydrogen…
Correct answer: Hydrocarbon- A. Sulphur.
- B. Phosphorous
- C. Argon
- D. Sugar.
Explanation: London forces are significant in noble gases like argon. Noble gases are known for their weak intermolecular interactions, mainly London…
Correct answer: Argon- A. Alcohol-ether.
- B. Nicotine-water.
- C. Benzene-water.
- D. Both A and B.
Explanation: The nicotine-water system has an LCST of 61 °C, and also a UCST of 210 °C at pressures high enough for liquid water to exist at that…
Correct answer: Nicotine-water.- A. Dipole-dipole forces
- B. Dipole-induced dipole forces
- C. London dispersion forces
- D. Hydrogen bonding
Explanation: A is incorrect because dipole-dipole forces only occur in polar molecules.B is incorrect as dipole-induced dipole forces are present…
Correct answer: London dispersion forces- A. Atoms of helium in gaseous state at high temperature
- B. Molecules of water
- C. Molecules of NH3
- D. Molecules of HCl gas
Explanation: Option A is correct because helium atoms are non-polar and only exhibit London dispersion forces.
Correct answer: Atoms of helium in gaseous state at high temperature- A. boiling point
- B. heat of vaporization
- C. heat of sublimation
- D. moles
Explanation: The number of moles of a substance does not depend on the strength of dipole-dipole forces.
Correct answer: moles- A. Osmotic pressure
- B. Freezing point
- C. Diffusion
- D. Melting
Explanation: The correct option is D, melting. Melting is not a property of liquids but a process that occurs when a solid is heated to become a liquid.
Correct answer: Melting- A. Colorless
- B. Is a bad conductor
- C. Does not expand linearly
- D. Has a low boiling point of 100oC
Explanation: The correct answer is that water does not expand linearly. Water's anomalous expansion, particularly its contraction from 0°C to 4°C and…
Correct answer: Does not expand linearly- A. Lighter
- B. Highest
- C. Heavier
- D. Heaviest
Explanation: Water has the highest density at 4 degree C as the cage-like structure which forms when water freezes starts breaking.
Correct answer: Heaviest- A. Water
- B. Kerosene oil
- C. Mercury
- D. rectified spirit
Explanation: Vapor pressure is determined by the strength of intermolecular forces, with weaker forces leading to higher vapor pressure.
Correct answer: Mercury- A. Barometric method is more accurate than Manometric method.
- B. Manometric method is more accurate than Barometric method.
- C. Both are equally accurate and applicable.
- D. Both methods are in use but are not reliable.
Explanation: Barometers are more limited in design and function than manometers, hence, manometers can calculate other pressures along with atmospheric…
Correct answer: Manometric method is more accurate than Barometric method.- A. Absence of hydrogen bonding
- B. High latent heat of vaporization
- C. Freely moving molecules
- D. Statement is incorrect
Explanation: Steam has more warmth and vitality than water. Due to its dormant warmth of vaporization, it will produce more burn than boiling water.
Correct answer: High latent heat of vaporization- A. Carbon tetrachloride
- B. Ethyl alcohol
- C. Benzene
- D. Acetic acid
Explanation: Option A (Carbon tetrachloride) is correct. It has the lowest boiling point because it is a nonpolar molecule with weak intermolecular…
Correct answer: Carbon tetrachloride- A. H2O
- B. HCl
- C. CH3COOH
- D. CH3OCH3
Explanation: Due to the presence of methyl groups that bounds to oxygen there is less tendency of hydrogen bonding in ethers.Also, it does not have…
Correct answer: CH3OCH3- A. PH3
- B. CH4
- C. NH3
- D. SiH4
Explanation: Hydrogen bonding occurs when hydrogen is bonded to a highly electronegative atom such as nitrogen, oxygen, or fluorine, which creates a…
Correct answer: NH3- A. CH3
- B. CH3 OCH3
- C. CH3NH3
- D. C6 H5 OCH3
Explanation: Hydrogen bonding is possible when a hydrogen atom is bonded to another electronegative atom like O,F,N etc therefore the answer will be C.
Correct answer: CH3NH3- A. Hydrogen gas (H2)
- B. Proteins
- C. Carbohydrates
- D. Ammonia (NH3)
Explanation: Hydrogen bonding is an intermolecular force that occurs when a hydrogen atom is covalently bonded to a highly electronegative atom, such…
Correct answer: Hydrogen gas (H2)- A. CH3-O-CH3
- B. CH3 -CH2 -OH
- C. CH3 -CH2-NH2
- D. None of the above.
Explanation: Option B contains OH that can interact with the water to form a hydrogen bond with water.
Correct answer: CH3 -CH2 -OH- A. Very small size of Nitrogen
- B. Pyramidal structure of NH3
- C. Enhanced electronegative character of Nitrogen
- D. Enhanced electropositivity of nitrogen
Explanation: The boiling point of ammonia (NH3) is higher compared to the hydrides of other Group V elements because of its stronger intermolecular…
Correct answer: Enhanced electronegative character of Nitrogen