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 : Identify dispersed phase and dispersion medium in the following colloidal dispersions : a. milk b. blood c. printing ink
Last Answer : Identify dispersed phase and dispersion medium in the following colloidal dispersions : a. milk b. blood c. printing ink d. fog
Description : If an electric field is applied to a colloidal sol, the dispersed phase particles are found to move towards the electrode of opposite charge. If however, the dispersed phase is made stationary, the ... move in the opposite direction. What is the term used for such movement of dispersion medium ?
Last Answer : Ans. Electro osmosis.
Description : The colloidal system consisting of a liquid dispersed in a solid dispersion medium is termed as :
Last Answer : The colloidal system consisting of a liquid dispersed in a solid dispersion medium is termed as : A. aerosol B. foam C. emulsion D. gel
Description : Cloud is a colloidal dispersion of (1) Air in a dispersion medium of water (2) Fog in a dispersion medium of water (3) Mist in a dispersion medium of air (4) Water drops in a dispersion medium of air
Last Answer : Water drops in a dispersion medium of air
Description : Natural rubber is obtained from latex, which is a colloidal dispersion of rubber in water. Which of the following is used as a coagulant in latex? (A) Ammonium alum (B) Potassium alum (C) Both ‘a’ & ‘b’ (D) Neither ‘a’ nor ‘b
Last Answer : (C) Both ‘a’ & ‘b
Description : What is one property of skim milk indicating that it is a colloidal dispersion?
Last Answer : its dairy
Description : All gases form what type of mixture? w) dispersion x) colloidal y) homogeneous z) heterogeneous
Last Answer : ANSWER: Y -- HOMOGENEOUS
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 : A colloidal solution formed between two liquids is called?
Last Answer : Emulsion
Description : Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispered phase and dispersion medium, respectively is :
Last Answer : Among the colloids cheese (C), milk (M) and smoke (S), the correct combination of the dispered phase and ... , M : liquid in solid, S : solid in gas
Description : Assertion (A) :Sunlight reaches us without dispersion in the form of white light and not as a component. Reason(R) : Dispersion takes place due to variation of refractive index for different wavelength but in vaccum the speed of ... of A. (c) A is true but R is false. (d) A is false but R is true.
Last Answer : (a) Both A and R are true and R is the correct explanation of A.
Description : SnO2 forms a positively charged colloidal sol in acidic medium and a negatively charged sol in the basic medium. Why ?
Last Answer : Ans. SnO2 is amphoteric in nature. It reacts with acid eg. HCl to form SnCl4 in the solution. The common Sn4+ ions are adsorbed on the surface of SnO2 particles giving them a positive ... solution. The stannate ions are adsorbed on the surface of SnO2 particles giving them a negative charge.
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 : The phenomenon of change in direction of light when it passes from one medium to another is called - (1) Propagation (2) Reflection (3) Refraction (4) Dispersion
Last Answer : (3) Refraction Explanation: Refraction is the change in direction of wave propagation due to a change in its transmission medium. Due to the change of medium, the phase velocity of the wave is changed but its frequency remains constant.
Description : Dispersion is used to describe the a. Splitting of white light into its component colors b. Propagation of light in straight lines c. Bending of a beam of light when it goes from one medium to another d. Bending of a beam light when it strikes a mirror
Last Answer : a. Splitting of white light into its component colors
Description : Pick up the correct statement from the following: (A) The refractive index of a medium varies according to the wavelength of the radiation, (B) The variation of the refractive index with wave length, ... of white light by passing through a prism is caused due to dispersion (D) All of these
Last Answer : Answer: Option D
Description : Dispersion is used to describe the ∙ a. Splitting of white light into its component colors ∙ b. Propagation of light in straight lines ∙ c. Bending of a beam of light when it goes from one medium to another ∙ d. Bending of a beam light when it strikes a mirror
Description : The phenomenon of change in direction of light when it passes from one medium to another is called (1) Propagation (2) Reflection (3) Refraction (4) Dispersion
Last Answer : Refraction
Description : It is said that, in the very distant future black holes could leak and disperse. Can that happen? If it can, how? -Space
Last Answer : After 1040 years, black holes will dominate the universe. They will slowly evaporate via Hawking radiation. A black hole with a mass of around 1 M ☉ will vanish in around 2 1066 years. As the ... black hole is proportional to the cube of its mass, more massive black holes take longer to decay.
Description : How do seeds disperse?
Last Answer : Apple seeds disappear because you eat them
Description : How can wind help disperse seeds?
Last Answer : Two examples are the fluffy seeds of the dandelion and the rose-bay willow herb blowing far and wide on the wind.
Description : What type of fruits the animals and fruits and how they disperse seeds?
Last Answer : Feel Free to Answer
Description : How does papaya seed disperse?
Last Answer : we eat it
Description : Tear gas used by the police to disperse the mob contains - (1) Carbon dioxide (2) Chlorine (3) Ammonia (4) Hydrogen sulphide
Last Answer : (2) Chlorine Explanation: Tear gas, formally known as a lachrymatory agent, is a possibly lethal chemical weapon that stimulates the corneal nerves in the eyes to cause tears, pain, and even blindness.
Description : Tear gas used by the police to disperse the mob contains – (1) carbon dioxide (2) chlorine (3) ammonia (4) hydrogen sulphide
Last Answer : (2) chlorine Explanation: Tear gas is a compound. Each molecule of tear gas contains one atom of chlorine. The compound 2- chlorobenzalmalononitrile, a cyanocarbon, is the defining component of a "tear gas" commonly referred to as CS gas, which is used as a riot control agent.
Description : You have to prepare a prism to disperse light to get spectrum. The glass used is
Last Answer : lead glass.
Description : Why it is necessary to disperse seeds and fruits?
Last Answer : Transfer of seeds and fruits from their parents is called their dispersal. It reduce the competition for light, water, space and other nutrients between members of species
Description : Which dyes become linked to the fibre by chemical reaction? (a) Acid dyes (b) Direct dyes (c) Disperse dyes (d) None of these
Last Answer : Acid dyes
Description : How does a blog directly impact sales of a company? A. It is typically used as the way to disperse company coupons B. It can be used to talk negatively about the competition C. It tells customers what products to buy D. Typically a blog does not directly create sales
Last Answer : A. It is typically used as the way to disperse company coupons
Description : Select the option that is most nearly OPPOSITE in meaning to the word in BOLD. Don’t dissipate your strength on useless projects. (a) Conserve (b) Disperse (c) Dispel (d) Squander
Last Answer : (a) Conserve
Description : Tear gas used by the police to disperse the mob contains (1) carbon dioxide (2) chlorine (3) ammonia (4) hydrogen sulphide
Last Answer : chlorine
Description : The dispersed phase in colloidal iron (III) hydroxide and collodial gold is positively and negtively charged respectively with of the following statem
Last Answer : The dispersed phase in colloidal iron (III) hydroxide and collodial gold is positively and negtively ... readily than the iron (III) hydroxide sol.
Description : Which of the following is not used as a filter medium in case of corrosive liquids? (A) Nylon (B) Glass cloth (C) Metal cloth of monel or stainless steel (D) Cotton fabric
Last Answer : (D) Cotton fabric
Description : __________ columns are used for liquid dispersion in a continuous gas phase. (A) Packed (B) Pulse (C) Bubble cap (D) Sieve plate
Last Answer : (A) Packed
Description : What is correct in regard to high copper amalgam, A. Reacts and strengthens the amalgam by its dispersion properties B. Reacts to form copper-tin phase thereby eliminating the tin-mercury ... thereby eliminating the silver mercury phase D. Reacts and strengthens the amalgam by its grain diffusion
Last Answer : B. Reacts to form copper-tin phase thereby eliminating the tin-mercury phase
Description : Liquid-liquid colloidal system is known as
Last Answer : Liquid-liquid colloidal system is known as A. aerosol B. foam C. emulsion D. gel
Description : Proteins can exist in the cell in the forms of a. Colloidal particles b. crystalloid c. Both d. none
Last Answer : Colloidal particles
Description : Aerosol is a system of colloidal particles having a size of
Last Answer : Aerosol is a system of colloidal particles having a size of A. `5mum` B. `1-2 mum` C. less than `100 mum` D. more than `10 mum`
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 : Fog is a colloidal system of :-
Last Answer : Fog is a colloidal system of :- A. gas in liquid B. liquid in gas C. gas in gas D. gas in solid
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 : Minimum number of phases that exists in a system is 1. Number of chemical species in a colloidal system is (A) 1 (B) 2 (C) 3 (D) 4
Last Answer : (B) 2
Description : Number of phases in a colloidal system is: (A) 1 (B) 2 (C) 3 (D) 4
Description : An aerosol is a colloidal system of a?
Last Answer : solid dispersed in gas
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 : emulsion
Description : Milk is a colloidal system in which: (1) Water is dispersed in fat (2) Fat is dispersed in water (3) Fat and water are dispersed in each other (4) Fat is dissolved
Last Answer : Fat is dispersed in water
Description : Most liquids that conduct electricity are solutions of acids, bases and ______. Salts Who is known as the father of modern chemistry?
Last Answer : Antoine Lavoisier