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 4 of 18
- A. Hygrometer
- B. Hydrometer
- C. Anemometer
- D. Viscometer
Explanation: A viscometer measures a liquid's viscosity by measuring its resistance to flow under specified conditions.
Correct answer: Viscometer- A. Remains same
- B. Increases
- C. Decreases
- D. None
Explanation: Heating a liquid increases the kinetic energy of its molecules and weakens the relative effect of cohesive attractions, so the liquid…
Correct answer: Decreases- A. Decibell
- B. Torr
- C. Poise
- D. Hertz
Explanation: The poise is the CGS unit of dynamic viscosity, which measures a liquid's resistance to flow.
Correct answer: Poise- A. DDT
- B. mercury salt
- C. Domestic waste
- D. Aluminum foil
Explanation: Domestic waste contains biodegradable materials such as food residues and paper that microorganisms can decompose.
Correct answer: Domestic waste- A. COD
- B. DO
- C. PH
- D. Salinity
Explanation: COD measures the amount of oxygen needed to chemically oxidize organic matter in water, so a high COD indicates greater organic pollution.
Correct answer: COD- A. Na-Silicate solution
- B. Na-sulphate solution
- C. Na-Chloride solution
- D. K-Chloride solution
Explanation: Sodium silicate is an alkaline builder used in detergents and can contribute significantly to their irritant or toxic effects, especially…
Correct answer: Na-Silicate solution- A. Gram Flour and Water
- B. Baking Soda and Vinegar
- C. Cement and Water
- D. Cornstarch and Water
Explanation: Oobleck is a non-Newtonian suspension made by mixing cornstarch with water.
Correct answer: Cornstarch and Water- A. greater than true solution
- B. greater than suspension
- C. In b/w true solution & suspension
- D. None of These
Explanation: Colloidal particles have sizes intermediate between those of true-solution particles and suspension particles, typically about 1 nm to…
Correct answer: In b/w true solution & suspension- A. 78°C
- B. 58°C
- C. 73°C
- D. 56°C
Explanation: Ethyl alcohol, or ethanol, boils at about 78°C at standard atmospheric pressure because its vapour pressure becomes equal to atmospheric…
Correct answer: 78°C- A. To check its Acidity and Basicity
- B. To Check temperature
- C. To check its Purity and nature
- D. None of These
Explanation: A liquid's boiling point is useful for identifying its nature and checking its purity, because dissolved impurities usually change the…
Correct answer: To check its Purity and nature- A. Glycerine
- B. Water
- C. Honey
- D. Spirit
Explanation: Honey is generally the most viscous of these liquids because its concentrated sugars create strong intermolecular attractions and greatly…
Correct answer: Honey- A. Drying
- B. Filtration
- C. Sieving
- D. Extraction
Explanation: Filtration separates an insoluble solid from a liquid by passing the mixture through a porous medium that retains the solid particles.
Correct answer: Filtration- A. 3%
- B. 3.5%
- C. 2.5%
- D. 2%
Explanation: Average seawater contains about 3.5% dissolved salts by mass, commonly expressed as approximately 35 parts per thousand.
Correct answer: 3.5%- A. 0.20 m glucose
- B. 0.20 m NaCl
- C. 0.15 m CaCl2
- D. 0.25 m sucrose
Explanation: Boiling-point elevation depends on the total number of dissolved particles, approximately i x molality: glucose gives 0.20, NaCl gives 2 x…
Correct answer: 0.15 m CaCl2- A. Anionic
- B. Cationic
- C. Nonionic
- D. Neutral
Explanation: Nonionic surfactants do not carry charged head groups, so their performance is much less affected by Ca2+ and Mg2+ ions in hard water.
Correct answer: Nonionic- A. Density
- B. Specific gravity
- C. Fluidity
- D. Absorbance
Explanation: Fluidity measures how easily a liquid flows and is defined as the reciprocal of viscosity: fluidity = 1/viscosity.
Correct answer: Fluidity- A. parts of solute in 1000 parts of solvent
- B. parts of solvent in 1000 parts of solute
- C. parts of solute in one million parts of solution
- D. parts of solvent in one million parts of solute
Explanation: Parts per million means the amount of solute present per one million parts of solution, such as 1 mg solute per 1 kg aqueous solution.
Correct answer: parts of solute in one million parts of solution- A. Molecules are surrounded by solvent molecules
- B. Ions are surrounded by solvent molecules
- C. Both ions and molecules are surrounded by solvent molecules
- D. Both ions and molecules are surrounded by water molecules
Explanation: Hydration is the solvation process in which dissolved ions or molecules become surrounded by water molecules.
Correct answer: Both ions and molecules are surrounded by water molecules- A. % w/w
- B. % w/v
- C. % v/v
- D. % v/w
Explanation: Both the alcohol and water amounts are measured as volumes, so the concentration is expressed as volume by volume, or % v/v.
Correct answer: % v/v- A. solvent
- B. solute
- C. phase
- D. ion
Explanation: The solute is the component present in the smaller amount and is dissolved by the solvent, which is usually present in the larger amount.
Correct answer: solute