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 : 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 : 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 : 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 : Why solubility of gases is lesser in liquids?
Last Answer : Ans: Gas molecules are far apart, so they have weak attractive forces among their own molecules & also have less attraction for solvent molecules as well. So they have lesser solubility in liquids.
Description : What is dissolution process?
Last Answer : Ans: The process of dissolution a solute in a solvent is called dissolution.
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 : An emulsion is a colloidal solution of - (1) Liquid in liquid (2) Solid in liquid (3) Gas in solid (4) Solid in Solid
Last Answer : (1) Liquid in liquid Explanation: An emulsion is a mixture of two or more liquids that are normally immiscible (unmixable or unblendable). Emulsions are part of a more general class ... of emulsions include vinaigrettes, homogenized milk, mayonnaise, and some cutting fluids for metal working.
Description : How can a colloidal solution and true solution of the same colour be distinguished from each other?
Last Answer : Ans.: By Tyndal effect( colloidal solution will scatter light and path becomes lighted where as no such phenomena is observed in true solution.)
Description : What type of colloidal sols are formed in the following ? (i) Sulphur vapours are passed through cold water. (ii) White of an egg is mixed with water. (iii) Concentration of soap solution is increased.
Last Answer : (i) Multimolecular colloid (ii) Macromolecular colloid (iii) Associated colloid.
Description : A sol is prepared by addition to excess AgNO3 solution in KI solution. What charge is likely to develop on the colloidal particles ?
Last Answer : Ans. Positive.
Description : The colloidal solution of gold prepared by different methods have different colours. Why ?
Last Answer : Ans. Due to difference in the size of colloidal particles.
Description : Colloids or Colloidal Solution
Last Answer : Colloids or Colloidal Solution : A heterogeneous solution in which dispersed phase mixed in dispersion medium.
Description : One property a colloidal dispersion has that a solution does not is: w) homogeneity x) filterability y) the Tyndall effect z) osmotic pressure
Last Answer : ANSWER: Y -- THE TYNDALL EFFECT
Description : An emulsion is a colloidal solution of (1) Liquid in liquid (2) Solid in liquid (3) Gas in solid (4) Solid in Solid
Last Answer : Liquid in liquid
Description : A substance which readily forms colloidal solution in contact with water is called (1) Extrinsic colloid (2) Associated colloid (3) Hydrophobic colloid (4) Hydrophilic colloid
Last Answer : Hydrophilic colloid
Description : Explain why particles of a colloidal solution do not settle down when left undisturbed, while in the case of a suspension they do? -Maths 9th
Last Answer : The colloidal particles are smaller and not heavy. They always remain in a state of zig-zag motion, called Brownian movement, which counters the force of gravity acting on colloidal particles and ... particles of suspension are larger, heavy and have less movement, thus settle down due to gravity.
Description : Which colloidal solution is used in photography? -Do You Know?
Last Answer : Photographic emulsion is a light-sensitive colloid used in film-based photography. Most commonly, in silver-gelatin photography, it consists of silver halide crystals dispersed in gelatin.
Description : Which colloidal solution is commonly used as germ killer? -Do You Know?
Last Answer : colloidal solution is commonly used as germ killer soo therefore the option a is correct
Description : Assertion :- A gas mixed with another gas forms a colloidal solution. Reason :- Mixture of gases is homogenous system.
Last Answer : Assertion :- A gas mixed with another gas forms a colloidal solution. Reason :- Mixture of gases is ... . D. If both Assertion & Reason are False.
Description : Colloidal solution show in `H_(2)O` :-
Last Answer : Colloidal solution show in `H_(2)O` :- A. Paramagnetism B. Scttering of light (tyndall effect) C. Refraction D. All of these
Description : The protcting power of lyophilic colloidal solution is expressed in terms of
Last Answer : The protcting power of lyophilic colloidal solution is expressed in terms of A. Critical number B. ... number C. Coagulation value D. Gold number
Description : Soaps essentially form a colloidal solution in water and remove the greasy matters by :
Last Answer : Soaps essentially form a colloidal solution in water and remove the greasy matters by : A. adsorption B. emulsification C. coagulation D. absorption
Description : The volume of a colloidal particle `V_C` as compared to the volume of a solute particle in a true solution `V_S` could be
Last Answer : The volume of a colloidal particle `V_C` as compared to the volume of a solute particle in a true solution `V_S` could ... `~ 10^(-3)` D. `~ 10^(3)`
Description : A colloidal solution can be purified by the following method :
Last Answer : A colloidal solution can be purified by the following method : A. dialysis B. peptization C. filtration D. oxidation
Description : Colloidal solution of gold prepared by different methods of different colours because of :
Last Answer : Colloidal solution of gold prepared by different methods of different colours because of : A ... particles D. impurities produced by different methods
Description : Fog is a colloidal solution of (a) liquid in gas (b) solid in gas (c) gas in solid (d) gas in liquid
Last Answer : Ans:(a)
Description : The medicines are most effective, if they are administered in the (a) colloidal state (b) solid state (c) solution state (d) gaseous state
Description : An alloy is an example of : (1) Colloidal solution (2) Emulsion (3) Solid solution (4) Heterogeneous mixture
Last Answer : (3) Solid solution Explanation: A Solid solution is a uniform mixture of substances in solid form.
Description : When a strong beam of light is passed through a colloidal solution, the light will – (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected
Last Answer : (1) be scattered Explanation: When a strong beam of light is passed through a colloidal solution, the light will be scattered.
Description : Which colloidal solution is commonly used as germ killer?
Last Answer : Colloidal sulphur
Description : Which colloidal solution is used in photography?
Last Answer : Colloidal silver bromite
Description : A colloidal solution formed between two liquids is called?
Last Answer : Emulsion
Description : Non-colloidal solution is an example of the __________ fluid. (A) Non-Newtonian (B) Newtonian (C) Dilatent (D) Pseudo-plastic
Last Answer : (B) Newtonian
Description : Which of the following is a Newtonian fluid? (A) Rubber latex (B) Sewage sludge (C) Quicksand (D) Non-colloidal solution
Last Answer : (D) Non-colloidal solution
Description : High molecular weight, pharmacodynamically inert, nonantigenic substances which form colloidal solution are used as: A. Osmotic purgatives B. Osmotic diuretics C. Plasma expanders D. All of the above
Last Answer : C. Plasma expanders
Description : Choose the correct statement about osmotic diuretics: A. They are large molecular weight substances which form colloidal solution B. Their primary site of action is collecting ducts in the ... C. They increase water excretion without increasing salt excretion D. They can lower intraocular pressure
Last Answer : D. They can lower intraocular pressure
Description : 1. Who among the following was an eminent Painter? 2. Which colloidal solution is commonly used as germ killer? 3. Which is an insectivorous plant? 4. Which is a north flowing river? 5. Who ... activity in India found? 20. Where did the Indian National Army (I.N.A.) come into existence?
Last Answer : Answer : 1. Sarada Ukil 2. Colloidal sulphur 3. Pitcher plant 4. Chambal 5. Sir John Lawrence 6. Dr. B. N. Rao 7. Syndicate Bank 8. Bharatnatyam 9. Karnataka to Tamil Nadu 10. Lord Mayo ... . Lala Lajpat Rai 16. January 27 17. Land Development Bank 18. Colloidal state 19. Dalmia hill 20. Singapore
Description : When a strong beam of light is passed through a colloidal solution, the light will (1) be scattered (2) pass unchanged (3) be absorbed (4) be reflected
Last Answer : be scattered
Description : Assertion Colloidal sols scatter light while true solutions do not. Reason The particles in the colloidal sol move slower than that of the true solutions. -Chemistry
Last Answer : Both assertion and reason are true but the reason is not the correct explanation of assertion. The size of colloidal particles is large enough to scatter light while particles of a true solution are too small to scatter light.
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 : A colloidal system in which a liquid is dispersed in a liquid is called – (1) gel (2) emulsion (3) sol (4) precipitate
Last Answer : (2) emulsion Explanation: An emulsion is a mixture of two or more liquids that are normally immiscible (nonmixable or unblendable). Emulsions are part of a more general class of two-phase ... ). Examples of emulsions include vinaigrettes, milk, mayonnaise, and some cutting fluids for metal working.
Description : What is observed (i) When a beam of light is pressed through a colloidal sol (ii) An electrolyte, NaCl is added to hydrated ferric oxide sol. (iii) Electric current is passed through colloidal sol.
Last Answer : Ans.: (i) Tyndal Effect (iv) Coagulation (v) Electrophoresis