Description : What is colloidal solution?
Last Answer : Ans: A solution in which solute particles are bigger than those present in a true solution and which cannot be filtered id called a colloidal solution.
Description : Define freezing mixture.
Last Answer : Ans: The mixture formed by mixing ice and salt having low temperature, than the freezing point of water is called freezing mixture.
Description : Why ionic compounds are more soluble in water than others?
Last Answer : Ans: As water is a polar compound, so it dissolves ionic compounds in large amounts due to its strong interaction with ions (solute particles).
Description : Why vegetable oil is not soluble in water?
Last Answer : Ans: Water is a polar solvent and will dissolve only polar compounds whereas vegetable oil is non-polar, so as a result these are insoluble in water.
Description : Is there any case in which we cannot make saturated solution?
Last Answer : Ans: Yes, there are such solutions in which a liquid solute is soluble in a liquid solvent in all properties; we cannot make saturated solutions in such case.
Description : How dissolution takes place by hydrogen bonding?
Last Answer : Ans: Many covalent compounds having hydroxyl group (-OH) in them are dissolved in water. In such compounds hydrogen bonds are formed between the water molecules and solute, which make them soluble in water.
Description : How dissolution takes place by hydration?
Last Answer : Ans: When an ionic compound is dissolved in water+ve hydrogen atoms of water molecule surrounds the –ve ions of solute, & -ve oxygen atoms surrounds the +ve ions and thus hold it in the dissolved form. This process is called hydration.
Description : Why water is called as “Universal Solvent”?
Last Answer : Ans: Because it can dissolve a lot of things in it, due to presence of strong cohesive forces in it and it’s ability to form H-bonding and hydration with solutes.
Description : What is dissolution process?
Last Answer : Ans: The process of dissolution a solute in a solvent is called dissolution.
Description : Define “ Solution”
Last Answer : A homogenous mixture of different chemical substances, which has uniform chemical properties (composition) throught and shows same physical properties, is called a solution.
Description : With increase in temperature, the solubility of gases in liquids, at fixed pressure (A) Increases (B) Decreases (C) Remain same (D) Either (A) or (B), depends on the system
Last Answer : (B) Decreases
Description : Pick out the wrong statement regarding the solubility characteristics of high polymers. (A) Greater the degree of cross-linking in the polymer, lesser is its solubility (B) Polymers having more ... of the solvent (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Last Answer : (D) High molecular weight polymers on dissolving gives solution of very low viscosity
Description : In an interphase mass transfer process, the lesser the solubility of a given solute in a liquid, the higher are the chances that the transfer process will be (A) Liquid phase resistance-controlled (B) Gas phase resistance controlled (C) Impossible (D) Driven by a non-linear driving forc
Last Answer : (B) Gas phase resistance controlled
Description : A plait point is the point on the solubility curve, where the tie line reduces to a point. What is the number of plait point for a ternary system containing two pairs of partially miscible liquids? (A) 0 (B) 1 (C) 2 (D) 3
Last Answer : (A) 0
Description : With increase in temperature, the mutual solubility of two liquids (A) Increases (B) Decreases (C) Remains unchanged (D) Decreases exponentially
Last Answer : (A) Increases
Description : Separation of two volatile liquids by distillation makes use of their (A) Selectivity (B) Relative volatility (C) Solubility (D) Density difference
Last Answer : (B) Relative volatility
Description : Critical solution temperature (or the con-solute temperature) for partially miscible liquids (e.g., phenol-water) is the minimum temperature at which (A) A homogeneous solution (say of phenol water) is ... a decreasing trend (C) Two liquids are completely separated into two layers (D) None of these
Last Answer : (A) A homogeneous solution (say of phenol water) is formed
Description : On increasing the temperature the solubility of most of the gases in water decreases. An important consequence of this effect is the thermal pollution of water, such as occurs around power plants cooled by a river or stream. How is the survival of fish affected by thermal pollution of water?
Last Answer : Ans.: When the water temperature of the river or stream is increases the solubility of oxygen in water decreases. Due to this decrease in dissolved oxygen the survival of fish becomes difficult.
Description : Why liquids diffuse slowly as compared to gases?
Last Answer : Ans.In liquid the intermolecular forces (vander waal’s forces) are greater than in gas.
Description : Which statement is false? (a) Many alkanes are soluble in water. (b) All alkanes have a lower density than water. (c) At room temperature some alkanes are liquids, some solids, some gases. (d) All alkanes burn
Last Answer : Many alkanes are soluble in water
Description : Explain diffusion & its law. Also explain diffusion in gases & liquids.
Last Answer : Ans : Diffusion : The spreading of a substance through medium like air or liquid is called diffusion. The rate of diffusion of a substance depends upon its molar mass or density. Example : When ... the available space due to their kinetic energy. This spreading of gas is called diffusion in gas.
Description : The order of solubility of noble gases in water is
Last Answer : The order of solubility of noble gases in water is A. (A)HegtArgtKrgtNegtXe B. (B)HegtNegtArgtKrgtXe C. (C)XegtArgtKrgtHegtNe D. (D)XegtKrgtArgtNegtHe
Description : The solubility of noble gases in water shows the order
Last Answer : The solubility of noble gases in water shows the order A. `He gr Ar gt Kr gt Ne gt Xe` B. `He gt Ne ... Xe gt Kr gt Ar gt Ne gt He` D. None of these
Description : The temperature affects the A. Biological activity of bacteria in sewage B. Solubility of gases in sewage C. Viscosity of sewage D. All the above
Last Answer : ANS: D
Description : Separation of a mixture of two gases by absorption in the liquid solvent depends upon the difference in their (A) Viscosity (B) Density (C) Solubility (D) Relative volatility
Last Answer : (C) Solubility
Description : Pick out the wrong statement. (A) In solvent extraction, the distribution co-efficient should be as large as possible for solvent economy (B) With increase in pressure, the solubility of ... in distillation column (D) The capacity of a distillation column is maximum at total reflux
Last Answer : (D) The capacity of a distillation column is maximum at total reflux
Description : Pick out the wrong statement: (A) Absorption factor is constant, when the equilibrium and operating lines are straight (B) In case of a stripper, the equilibrium curve is always below ... (D) In the absorption of low solubility gases, the liquid film is the controlling resistance
Last Answer : (B) In case of a stripper, the equilibrium curve is always below the operating line
Description : Pick out the wrong statement. (A) At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature (B) Normally, the gases which are easily liquefied are more soluble ... (D) At constant pressure, solubility of a gas in a liquid increases with rise in temperature
Last Answer : (A) At constant pressure, solubility of a gas in a liquid diminishes with rise in temperature
Description : after atoms and molecules of gases and liquids are heated they move away from the heat . what takes their place?
Last Answer : ions
Description : What can liquids and gases do that solids can not?
Last Answer : Need answer
Description : What is a solution A. a solid dissolved in a gas B. a solute and a solvent C. a liquid dissolved in a gas D. an amalgam of solids, liquids, and gases?
Last Answer : B. A solute and a solvent
Description : The diffusivity, DAB (for component A diffusing in B) is equal to the diffusivity DBA (for component B diffusing in A) for a binary mixture of (A) Newtonian liquids (B) Non-Newtonian liquids (C) Ideal gases (D) Real gases
Last Answer : (C) Ideal gases
Description : In case of non-ideal gases and liquids, the molal diffusivity (A) Varies inversely as the pressure (B) Varies directly as the pressure (C) Is independent of pressure (D) Is equal to the volumetric diffusivity
Last Answer : (C) Is independent of pressure
Description : For gases, the thermal conductivity increases with temperature rise. For liquids, with increase in concentration, its thermal conductivity generally (A) Decreases (B) Increases (C) Remains unchanged (D) Increases exponentially
Last Answer : (A) Decreases
Description : Which of the following is generally considered as opaque surface towards radiations? (A) Gases (B) Solids (C) Liquids (D) Both (B) and (C)
Last Answer : (D) Both (B) and (C)
Description : Two liquids manometer is used for measuring small pressure differences in (A) Liquids (B) Gases (C) Mixture of hydrocarbons (D) None of these
Last Answer : (A) Liquids
Description : A differential pressure cell is used for (A) Measuring small pressure difference in gases (B) Measuring small pressure difference in liquids (C) Remote recording of pressure difference (D) Measuring the difference of the impact & the static pressure
Last Answer : (C) Remote recording of pressure difference
Description : Hot wire anemometer is used to measure the (A) Velocity of liquids (B) Temperature of liquids (C) Velocity of gases (D) Pressure of liquids
Last Answer : (C) Velocity of gases
Description : Identification of pipelines carrying different liquids and gases is done by the __________ of the pipe. (A) Diameter (B) Colour (C) Altitude (D) None of these
Last Answer : (B) Colour
Description : Why do gases expand faster than liquids and solids?
Last Answer : Because the particles of gases are widely disturbed i.e. their particles are far apart from each other and they free to move. Other
Description : Fugacity is a measure of the (A) Escaping tendencies of the same substance in different phases of a system (B) Relative volatility of a mixture of two miscible liquids (C) Behaviour of ideal gases (D) None of these
Last Answer : (A) Escaping tendencies of the same substance in different phases of a system
Description : Kopp's rule is used to calculate the heat capacity of (A) Solids (B) Liquids (C) Gases (D) All (A), (B) & (C)
Last Answer : (A) Solids
Description : Increase in temperature, in general results in the (A) Decrease in the viscosities of both liquids & gases (B) Increase in the viscosities of both liquids & gases (C) Increase in the viscosity of ... decrease in that of gases (D) Decrease in the viscosity of liquids and increase in that of gases
Last Answer : (D) Decrease in the viscosity of liquids and increase in that of gases
Description : 04. All the gases are considered to have compressible flow and all the liquids are considered to have incompressible flow. A) Correct B) Incorrect
Last Answer : A
Description : For very great pressures, viscosity of moss gases and liquids (A) Remain same (B) Increases (C) Decreases (D) Shows erratic behaviour
Last Answer : Answer: Option D
Description : Hydrometer is used to determine (A) Specific gravity of liquids (B) Specific gravity of solids (C) Specific gravity of gases (D) Relative humidity
Last Answer : Answer: Option A
Description : Hot wire anemometer is used to measure (A) Pressure in gases (B) Liquid discharge (C) Pressure in liquids (D) Gas velocities
Description : Which of the following have the highest thermal conductivities? a. liquids b. gases c. metals d. solids other than metals
Last Answer : metals
Description : In liquids and gases the current is due to the motion a. negative charges b. positive charges c. both negative and positive charges d. neutral particles
Last Answer : c. both negative and positive charges
Description : What is the solubility of sulfur ?
Last Answer : Sulfur valence 2, 4, 6 .