Description : When a bottle of scent is kept open in a corner of a room its odour is felt in all parts of the room. This is clue to the phenomenon of – (1) evaporation (2) vaporisation (3) diffusion (4) sublimation
Last Answer : (3) diffusion Explanation: Diffusion is one of several transport phenomena that occur in nature. A distinguishing feature of diffusion is that it results in mixing or mass transport without requiring ... are other transport mechanisms that use bulk motion to move particles from One place to another.
Description : A bottle filled with previously moistened mustard seeds and water was screw capped tightly and kept in a corner. It blew up suddenly after about half an hour. The phenomenon involved is (a) diffusion (b) imbibition (c) osmosis (d) DPD.
Last Answer : b) imbibition
Description : When a bottle of perfume is opened in one corner of a room the smell spreads soon throughout the room. This is an example of - (1) surface tension (2) capillarit (3) viscosity (4) diffusion
Last Answer : (1) surface tension Explanation: Diffusion is the spreading – mixing of gases through molecular motion.
Description : The phenomenon occuring during pumping of a liquid solution containing dissolved gases, which may come out of the solution giving rise to gas pockets, is termed as (A) Evaporation (B) Cavitation (C) Sublimation (D) Stripping
Last Answer : (B) Cavitation
Description : Conversion of a substance directly from solid to vapour state is known as (a) Vaporisation (b) Sublimation (c) Decomposition (d) Ionisation
Last Answer : Ans:(b)
Description : Pick out the wrong statement. (A) Minimum number of degree of freedom of a system is zero (B) Degree of freedom of a system containing a gaseous mixture of helium, carbon ... ) Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation
Last Answer : (D) Enthalpy and internal energy change is zero during phase change processes like melting, vaporisation and sublimation
Description : Specific/molar Gibbs free energy for a pure substance does not change during (A) Sublimation (B) Vaporisation (C) Melting (D) Either (A), (B) or (C)
Last Answer : (D) Either (A), (B) or (C)
Description : Entropy change of the reaction, H2O (liquid) → H2O (gas), is termed as the enthalpy of (A) Solution (B) Vaporisation (C) Formation (D) Sublimation
Last Answer : (B) Vaporisation
Description : Absorption/evolution of heat during conversion of a substance from one allotropic form to another is termed as the heat of (A) Sublimation (B) Fusion (C) Transition (D) Vaporisation
Last Answer : C) Transition
Description : Specific __________ does not change during a phase change (e.g. sublimation, melting, vaporisation etc.). (A) Entropy (B) Internal energy (C) Enthalpy (D) Gibbs free energy
Last Answer : (D) Gibbs free energy
Description : _________ does not change during phase transformation processes like sublimation, melting & vaporisation. (A) Entropy (B) Gibbs free energy (C) Internal energy (D) All (A), (B) & (C)
Last Answer : (B) Gibbs free energy
Description : Heat sensitive materials with very high latent heat of vaporisation may be economically separated using (A) Liquid extraction (B) Distillation (C) Evaporation (D) Absorption
Last Answer : (A) Liquid extraction
Description : The number of kg vaporised per kg of steam fed to the evaporator is defined as (A) Capacity (B) Rate of evaporation (C) Economy (D) Rate of vaporisation
Last Answer : (C) Economy
Description : If you could bottle a feeling and wear it as a scent, what would you bottle?
Last Answer : My husband. I love the way he smells.
Description : How are evaporation and sublimation the similar?
Last Answer : Feel Free to Answer
Description : When a gas turns into a liquid the process is called: A. Condensation B. Evaporation C. Deposition D. Sublimation
Last Answer : ANSWER: A
Description : Common salt is obtained from sea water by the process of (a) sublimation (b) evaporation (c) crystallisation (d) filtration
Description : Iron filings can be separated from a heterogenous mixture using the technique of (1) Sublimation (2) Magnetization (3) Sedimentation (4) Evaporation
Last Answer : (2) Magnetization Explanation: The method of separation using magnets is used when one of the components is magnetic. So the heterogeneous mixture of iron filings and some other material (such as sulphur ... by using magnets. Similarly, a mixture of sand and iron filings can be separated by magnet.
Description : Water can be separated from alcohol water mixture by – (1) decantation (2) evaporation (3) distillation (4) sublimation
Last Answer : (3) distillation Explanation: Distillation is a method of separating mixtures based on differences in volatilities of components in a boiling liquid mixture. Distillation is a unit operation, or a ... is distilled to separate its components- notably oxygen, nitrogen, and argon- for industrial use.
Description : Which type of intermolecular forces are effected in each of the following process: (i)Sublimation of iodine. (ii)Evaporation of water.
Last Answer : Ans. (i) Sublimation of iodine : Dispersion forces. (ii)Evaporation of water : Hydrogen bond.
Description : Mechanism of moisture removal in case of freeze drying of food stuff is by (A) Evaporation (B) Sublimation (C) Dehydration (D) Adsorption
Last Answer : (B) Sublimation
Description : Evaporation from ice and snow is known as------? A. evaporation B. sublimation (Answer) C. hydrogenation D. insolation
Last Answer : B. sublimation (Answer)
Description : In freeze- drying, water is removed from the product by a. Evaporation b. Sublimation c. Transpiration d. None of these
Last Answer : b. Sublimation
Description : The changing of solid directly to vapor without passing through liquid state is called a. Evaporation b. Vaporization c. Sublimation d. Condensation
Last Answer : Sublimation
Description : The specific terms used in phase transitions a. melting b. evaporation c. freezing d. sublimation
Last Answer : evaporation
Description : ____ is when water goes from a solid to a gas without passing through the liquid phase. a. Transfusion c. Evaporation b. Sublimation d. Condensation
Description : Define the terms-1) sublimation ii) evaporation
Last Answer : i) Sublimation: It is the process in which solid gets converted into vapour without formation of liquid and on cooling; the vapours get converted into solids. ii) Evaporation: Evaporation may be defined as free escape of vapours from the surface of the liquid below its boiling point.
Description : Iron filings can be separated from a heterogenous mixture using the technique of : (1) Sublimation (2) Magnetization (3) Sedimentation (4) Evaporation
Last Answer : Magnetization
Description : Water can be separated from alcohol water mixture by (1) decantation (2) evaporation (3) distillation (4) sublimation
Last Answer : distillation
Description : When vaporisation takes place through a blanketting film of gas, the phenomenon is termed as __________ boiling. (A) Pool (B) Nucleate (C) Transition (D) Film
Last Answer : (D) Film
Description : The bubbling off of carbon dioxide when a bottle of carbonated beverage is opened is a good example of: w) deliquescence x) effervescence y) condensation z) sublimation
Last Answer : ANSWER: EFFERVESCENCE
Description : Which of the following vacuum pumps operates by using a very cold surface to trap the gases on the cold surface? Is it a: w) sublimation pump x) turbo pump y) cryopump z) diffusion pump.
Last Answer : ANSWER: Y -- CRYOPUMP
Description : The phenomenon of melting under pressure and freezing again when the pressure is reduced is known as a. sublimation b. condensation c. deposition d. regelation
Last Answer : regelation
Description : Oil rises up the wick in a lamp because (1) Oil is very light (2) Of the diffusion of oil through the wick (3) Of the surface tension phenomenon (4) Of the capillary action phenomenon
Last Answer : (4) Of the capillary action phenomenon Explanation: It is because of the capillary action phenomenon because of which oil rise up the wick in a lamp. Capillary action, or capillarity, is the ability ... such as paper, in some nonporous materials such as liquefied carbon fiber, or in a cell.
Description : The absorption of ink by blotting paper involves - (1) capillary action phenomenon (2) viscosity of ink (3) siphon action (4) diffusion of ink through the blotting
Last Answer : (1) capillary action phenomenon Explanation: The ability of a liquid to flow in narrow spaces without the assistance of, or even in opposition to, external forces like gravity.
Last Answer : Of the capillary action phenomenon
Description : I am trying to construct a giant book made with plywood for the corner of a children's room. How should I go about constructing the binding/support for the book to stay standing, and also be able to open the book 90 degrees?
Last Answer : Maybe an internal metal frame, and the moving parts rested on wheels.
Description : Any suggestions for a genuine room deodorant that is not a mere coverup, and doesn't insinuate its own chemical scent?
Last Answer : Wouldn’t a good cleaning achieve what you’re looking for?
Description : Excess amount of absorbed water by plants is liberated out by – (1) Evaporation (2) Osmosis (3) Diffusion (4) Transpiration
Last Answer : (4) Transpiration Explanation: Water vapour transpires constantly through pores (stomata) in the surface of plant's leaves.
Description : Excess amount of absorbed water by plants is liberated out by : (1) Evaporation (2) Osmosis (3) Diffusion (4) Transpiration
Last Answer : Transpiration
Description : The phenomenon of osmosis is opposite to that of (A) Diffusion (B) Effusion (C) Affusion (D) Coagulation
Last Answer : A
Description : The absorption of ink by blotting paper involves: A. Viscosity of ink B. Capillary action phenomenon C. Diffusion of ink through the blotting D. Siphon action
Last Answer : ANSWER: B
Description : The absorption of ink by blotting paper involves (a) Viscosity of ink (b) Capillary action phenomenon (c) Diffusion of ink through the blotting (d) Siphon action
Description : In the process of dialysis, used on patients with affected kidneys, the phenomenon involved is (a) diffusion (b) absorption (c) osmosis (d) electrophoresis
Last Answer : Ans:(c)
Description : In the process of dialysis, used on patients with affected kidneys, the phenomenon involved is (1) Diffusion (2) Absorption (3) Osmosis (4) Electrophoresis
Last Answer : (3) Osmosis Explanation: Dialysis is the artificial process of getting rid of waste (diffusion) and unwanted water (ultrafiltration) from the blood. This process is naturally done by our kidneys. It ... it results in osmotic pressure which causes the fluid to move from the blood into the dialysate.
Description : The absorption of ink by blotting paper involves-----? A. Viscosity of ink B. Capillary action phenomenon (Answer) C. Diffusion of ink through the blotting D. Siphon action
Last Answer : B. Capillary action phenomenon (Answer)