Description : What term describes the process when a solid phase changes directly to the gas phase?
Last Answer : ANSWER: SUBLIMATION
Description : What phase change changes a solid to a gas?
Last Answer : Solid to Gas phase change is called Sublimation
Description : What is the process of a solid turning directly into a gas called?
Last Answer : A: Sublimation.
Description : What layer is directly beneath the Earth's crust is it a solid liquid or gas?
Last Answer : The Earth's crusts floats on the so-called upper mantle. The upper Mantle is predominantly solid but it can act like a fluid. You could compare it to soft plastic in that respect.
Description : The process of a solid converting directly into a gas is called: w) fusion x) sublimation y) condensation z) distillation
Last Answer : ANSWER: X -- SUBLIMATION
Description : (4) Water drops in a dispersion medium of air Explanation: A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed ... or gas. Cloud is a colloidal dispersion of Water drops in a dispersion medium of air.
Last Answer : Conduction band electrons have more mobility than holes because they – (1) are lighter (2) experience collision less frequently (3) have negative charge (4) need less energy to move them
Description : (2) Fat is dispersed in water Explanation: A colloid is a substance microscopically dispersed evenly throughout another substance. A colloidal system consists of two separate phases: a dispersed ... Milk is an emulsified colloid of liquid butterfat globules dispersed within a water-based solution.
Last Answer : The presence of ozone in the stratosphere is responsible for – (1) increasing the average global temperature in recent years (2) higher rate of photosynthesis (3) checking the penetration of ultra-violet rays to the earth (4) supplying oxygen for people travelling in jets
Description : Which of the following resistances is not involved in a gas phase catalytic (gas-solid) reaction? (A) Ash resistance (B) Gas film and pore surface diffusion resistances for reactants (C) Surface phenomenon resistance (D) Gas film and pore surface diffusion resistances for products
Last Answer : (A) Ash resistance
Description : One of the methods of purification of leach liquor is ion exchange, which involves (A) Exchange between two liquid phases (B) Exchange between a gaseous phase and a liquid phase (C) Exchange between a liquid phase and an organic resin phase (D) Exchange between a solid phase and a gas phase
Last Answer : (C) Exchange between a liquid phase and an organic resin phase
Description : _________ is the transition of a given substance from the solid to the gas phase with no intermediate liquid stage. a. Convection b. Conduction c. Radiation d. Sublimation
Last Answer : Sublimation
Description : The energy associated with individual molecules in a gas, liquid or solid. a. Specific Energy b. Molecular Energy c. Internal Energy d. Phase Energy
Last Answer : Internal Energy
Description : In HPLC, the stationary phase is made of _________ and the mobile phase is made of _________ A. Solid, liquid B. Liquid, liquid C. Liquid, gas D. Solid, gas
Last Answer : A. Solid, liquid
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
Last Answer : b. Sublimation
Description : Mobile phase can be A. gas or liquid B. solid or liquid C. only solid D. gas only
Last Answer : gas or liquid
Description : At room temperature, most elements are in which phase of matter? w) solid x) liquid y) gas z) plasma
Last Answer : ANSWER: W -- SOLID
Description : The rate of solid-liquid extraction is limited by the (A) Phase change of the solute as it dissolves in the solvent (B) Diffusion of the solute through the solvent in the pores to the outside of the particle (C) ... contact with the particle to the main bulk of the solution (D) All 'a', 'b' & 'c'
Last Answer : (D) All 'a', 'b' & 'c'
Description : What term describes what an actor breaks when he addresses the audience directly from stage?
Last Answer : It's called "breaking the fourth wall" and refers to a convention which evolved in the nineteenth century. The idea was that the actors were to behave as if they were in a room with four walls, three of ... course, not all drama uses the fourth wall convention. A lot of plays both old and new don't.
Description : During which process do ice and snow on Earth move directly from the solid state into water vapor in the atmosphere?
Last Answer : During the process of Sublimation.
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 : The process of conversion of substance directly from solid to vapour state?
Description : In the Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass is __________ the fluid viscosity. (A) Directly proportional to (B) Inversely proportional to (C) Inversely proportional to the square root of (D) Independent of
Last Answer : (B) Inversely proportional to
Description : Nusselt number/Biot number varies (A) Inversely with thermal conductivity (B) Directly with heat transfer co-efficient (C) Directly with thermal conductivity (D) Inversely with the dimension of the solid
Last Answer : (A) Inversely with thermal conductivity
Description : The changing of solid directly to vapor without passing through liquid state is called a. Evaporation b. Vaporization c. Sublimation d. Condensation
Description : In soldering, what alloy changes directly from a solid state to a liquid state?
Last Answer : Eutectic.
Description : Biosphere describes the earth realm where life occurs What describes the entire solid earth realm and is composed of mineral matter?
Last Answer : ANSWER: LITHOSPHERE
Description : How the change from a solid to a gas without the liquid state?
Last Answer : An example is 'Dry Ice' which is frozen Carbon Dioxide. On thawing, the solid turns into a gas without a liquid state.
Description : Why dry ice sublimating from a solid to a gas is a physical change?
Last Answer : Physical changes can be undone, and the substance undergoing thechange is still chemically the same thing. It is just in adifferent form.
Description : Is a physical change A.Forming a mixture B.Burning wood C.Food turning into waste in the intestines D.Turning solid sodium and chlorine gas into salt?
Last Answer : What is the answer ?
Description : Using the phase diagram for H2O, which of the following correctly describes water at 0°C and 1 atm?
Last Answer : At the melting point(Explanation) if you look at the phase diagram and look at the point where the water is 0 degrees C and 1 atm, they meet right on the line. This is the line that shows the melting point ... , since the point is on the line, water at 0 degrees C and 1 atm is at the melting point.
Description : A ground detection system is shown in the illustration for a three-phase ungrounded distribution system. Which of the following statements describes the conditions indicated if a full ground occurs in line 'A'? EL-0009 A ... . D. Lamp 'A' will go out and Lamps 'B' and 'C' will burn brightly.
Last Answer : Answer: D
Description : _______ describes the position of the waveform relative to time 0. A) Frequency B) Phase C) Amplitude D) Voltage
Last Answer : Phase
Description : Which of the following phases describes the phase of business cycle that occurs after a trough and before a peak (a) Lag (b) Consolidation © Expansion (d) Contraction
Last Answer : © Expansion
Description : Most substances are more dense in their solid form than in their liquid or gaseous form. What makes the solid phase more dense?
Last Answer : Solid has more energy
Description : If the solubilities of different components (in a liquid-liquid extraction system) increase with rise in temperature, then the temperature above which they dissolve completely is known as the critical solution ... On heating, a vapor phase will appear; while on cooling, a solid phase will appear
Last Answer : (D) On heating, a vapor phase will appear; while on cooling, a solid phase will appear
Description : A first order gaseous phase reaction is catalysed by a non-porous solid. The kinetic rate constant and the external mass transfer co-efficients are k and kg respectively. The effective rate constant (ke ff) is given by (A) ke ff = k + kg ( ... + kg )/2 (C) ke ff = (kkg ) 1/2 (D) 1/ke ff = 1/k + 1/kg
Last Answer : (D) 1/ke ff = 1/k + 1/kg
Description : If the vapour pressure at two temperatures of a solid phase in equilibrium with its liquid phase are known, then the latent heat of fusion can be calculated by the (A) Maxwell's equation (B) Clausius-Clapeyron Equation (C) Van Laar equation (D) Nernst Heat Theorem
Last Answer : B) Clausius-Clapeyron Equation
Description : Shrinkage allowance on pattern is provided to compensate for shrinkage when the (A) Metal changes from liquid state to solid state at freezing temperature (B) Solid phase temperature drops ... to room temperature (D) Liquid metal temperature drops from pouring temperature to freezing temperature
Last Answer : (B) Solid phase temperature drops from freezing temperature to the room temperature
Description : The phase transition of a liquid to a solid a. Solidification b. Freezing c. Fusion d. All of these
Last Answer : All of these
Description : What is the unique state at which solid, liquid and gaseous phase can go co-exist in equilibrium? a. Triple point b. Critical point c. Boiling point d. Pour point
Last Answer : Triple point
Description : The pressure of the vapor phase of a substance that is in equilibrium with the liquid or solid phase. a. Phase Pressure b. Equilibrium Vapor Pressure c. Specific Pressure d. Equilibrium Phase Pressure
Last Answer : Equilibrium Vapor Pressure
Description : Which method, vapor phase oxidation or direct-melt process, transforms deposited material into a solid glass preform by heating the porous material without melting?
Last Answer : Vapor phase oxidation.
Description : An example of sample preparation in bioanalysis is __________________? A. Solid-solid extraction B. Solid-liquid extraction C. Liquid-solid extraction D. Solid-phase extraction
Last Answer : D. Solid-phase extraction
Description : For a single phase overhead line having solid copper conductors of diameter 1 cm, spaced 60 cm between centers, the inductance in mH/km is?
Last Answer : For a single phase overhead line having solid copper conductors of diameter 1 cm, spaced 60 cm between centers, the inductance in mH/km is 0.05 + 0.2 ln (6010.5).