Steam Distillation and Surface Tension MCQs
At which of the following does the organic liquid in steam distillation vaporizes?
(A). Â than its boiling point lower temperature
(B). Â than its boiling point higher temperature
(C ). Â At its boiling point
(D). Â None of these
(E). None of these
Multiple Choice Question Answer: Â a
From aniline-water mixture using which one aniline is separated
(A). Â Steam distillation
(B). Â Fractional distillation
(C). Â Fractional crystallisation
(D). Â All of these
(E). None of these
Multiple Choice Question Answer:Â a
For the extraction, the pure solvent after the differential extraction cannot be used again.
(A ). Â True
(B). Â False
(E). None of these
Multiple Choice Question Answer: Â b
For separating substances which are _______steam distillation process is used
(A). Â Steam volatile
(B). Â All of these
(C). Â Steam volatile and immiscible with water
(D). Â Steam volatile and miscible with water
(E). None of these
Multiple Choice Question Answer: Â c
______ type of mixture is collected in a round bottom flask after passing through a steam generator.
(A). Â organic compound and steam, Mixture of volatile
(B ). Â organic compound and water, Mixture of volatile
(C). Â inorganic compound and steam, Mixture of nonvolatile
(D). Â organic compound and water, Mixture of nonvolatile
(E). None of these
Multiple Choice Question Answer: Â a
_______ is an application of surface tension?
(A). Â Molecular structure will be elucidated
(B). Â by surface tension measurements through parachor values all of these
(C). Â in preparations like toothpaste surfactants are incorporated
(D). Â like cleansing agents use of soaps and detergents
(E). None of these
Multiple Choice Question Answer: Â b
Which of the following is the surface tension of the liquid on increasing the temperature?
(A). Â Increases
(B). Â Decreases
(C). Â Remains constant
(D). Â None of these
(E). None of these
Multiple Choice Question Answer:Â b
Which of the following is the apparatus used for the determination of surface tension of a liquid?
(A). Â Oedometer
(B). Â Stalagmometer
(C). Â Consolidometer
(D). Â None of these
(E). None of these
Multiple Choice Question Answer: Â b
The liquid boils when the sum of vapor pressure due to organic liquid and due for watering becomes which one in steam distillation
(A). Â Lesser than atmospheric pressure
(B). Â quals to atmospheric pressure
(C). Â Greater than atmospheric pressure
(D). Â None of these
(E). None of these
Multiple Choice Question Answer:Â b
For separating organic compound with water __________ property is not possessed by the organic solvent required.
(A). Â It is less volatile than water
(B). Â It is easily vaporizable
(C). Â It is immiscible with water
(D). Â more soluble in its organic compound
(E). None of these
Multiple Choice Question Answer: Â a
_______ is the upper layer in differential extraction.
(A). Â Solvent layer
(B). Â Solute layer
(C). Â Aqueous layer
(D). Â None of these
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is the unit of surface tension in the CGS system?
(A). Â Dynes/cm
(B). Â N/m
(C). Â Kg/cm
(D). Â Dynes/m
(E). None of these
Multiple Choice Question Answer:Â a
With the help of which one stalagmometer is cleaned to remove grease?
(A). Â Distilled water
(B). Â Chromic acid
(C). Â Sulphuric acid
(D). Â Tartaric acid
(E). None of these
Multiple Choice Question Answer: Â b
In the upper solvent layer in differential extraction, ________ the organic compound be present?
(A). Â After the extraction
(B). Â During the extraction
(C). Â Before the extraction
(D). Â in the upper layer it is always present
(E). None of these
Multiple Choice Question Answer: Â a
From the organic solvent by _________the organic compound in differential extraction is recovered.
(A). Â Distillation
(B). Â Fractional crystallisation
(C). Â Steam crystallization
(D). Â Sublimation
(E). None of these
Multiple Choice Question Answer: Â a
Which of the following is the kinetic energy of the liquid molecules on increasing the temperature?
(A). Â Remains constant
(B). Â Increases
(C). Â Decreases
(D). Â None of these
(E). None of these
Multiple Choice Question Answer: Â b
.We get a concave meniscus because the adhesive force between water and glass are which one in case of water and glass than the cohesive forces in the water molecules.
(A). Â Weaker
(B). Â Stronger
(C). Â Same
(D). Â None of these
(E). None of these
Multiple Choice Question Answer: Â b
Which of the following is the surface tension of water at 250C?
(A). Â 72.14 dynes/cm
(B). Â 90.0 dynes/cm
(C). Â 82.5 dynes/cm
(D). Â 45.63 dynes/cm
(E). None of these
Multiple Choice Question Answer:Â a
. Because of which one shapes of drops of liquid are spherical?
(A). Â Conductivity
(B). Â Surface tension
(C). Â Absorption
(D). Â Viscosity
(E). None of these
Multiple Choice Question Answer: Â b
_______is incorrect?
(A). Â we observe a convex meniscus in case of mercury and glass
(B). Â for the rise and fall of the capillary tubes Surface tension is responsible
(C). Â All of these
(D). None of these
(E). Â they tend to repel each other if two drops encounter each other
Multiple Choice Question Answer: Â e
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