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Answers posted by yamini.v
Questions
951
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votes
A colloidal solution of gold in water is
answered
Mar 18, 2014
Answer : all the threeExplanation :Colour of a colloidal solution depends upon particle size . As ...
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The average particle mass in colloidal solutions can be determined by
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Mar 18, 2014
Answer : Osmotic pressureExplanation :The only measurable colligative property property of collo...
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The CMC of a given soap in water is $\;10^{-3}\;molL^{-1}\;.$ A $\;10^{-4}\;molL^{-1}\;$ solution of this soap in water is a
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Mar 18, 2014
Answer : true solutionExplanation :As the concentration of soap $\;(10^{-4}\;mol L^{-1})\;$ is les...
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Gold numbers of protective colloids A ,B ,C and D are 0.50 , 0.01 , 0,05 and 0.005 respectively , the correct order of their protective powers is
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Mar 18, 2014
Answer : $A < C < B < D$Explanation :Smaller the gold number , greater is the protective...
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Langmuir adsorption isotherm is deduced using the assumption
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Mar 18, 2014
Answer : The adsorption sites are equivalent in theralility to adsorb the particlesExplanation :La...
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The reactions given below , are the catalyst and corresponding process / reaction are matched , the mismatch is
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Mar 18, 2014
Answer : $\;N_{2}O_{5}\;:Haber\;Bosch\;process$Explanation :Haber - Bosch process is used for the...
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A plot of x/m versus log p for the adsorption of a gas on a solid gives a straight line with slope equal to
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Mar 18, 2014
Answer : $\;\large\frac{1}{n}$Explanation :For the adsorption of a gas on a solid $\;\large\frac{...
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The number of moles of lead nitrate needed to coagulate a mol of colloidal $\;[AgI]I^{-}\;$ is
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Mar 18, 2014
Answer : 1Explanation :$2 [AgI]I^{-} + Pb^{2+} \to PbI_{2} + 2AgI$Thus 2 moles of $[AgI]I^{-}\...
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Which among the following statements are connect with respect to adsorption of gases on a solid ?$\; \;$ (1) The extent of adsorption is equal to $\;kp^{n}\;$ according to freundlich isotherm.$\;\;$ (2) The extent of adsorption is equal to $\;kp^{\large\frac{1}{n}}\;$ according to freundlich isotherm . $\;\;$ (3) The extent of adsorption is equal to $\;\large\frac{(a+bp)}{ap}\;$ according to freundlich isotherm . $\;\;$ (4) The extent of adsorption is equal to $\;\large\frac{ap}{(1+bp)}\;$ according to freundlich isotherm . $\;\quad\;$ (5) Freundlich adsorption fails at a low pressure .
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Mar 18, 2014
Answer : 2 and 4Explanation :According freundlich isotherm ,$\large\frac{x}{m}=kp^{\large\frac{...
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The coagulation of 200 mL of a positive colloid took place . When 0.73 g Hcl was added to it without changing the volume much . The flocculation value of Hcl for the colloid is
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Mar 18, 2014
Answer : 100Explanation :200 mL of the sol needs = $\;\large\frac{0.73 g}{36.5 g/mol}=0.02\;mol\...
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What is the equation form of Langmuir isotherm under high pressure ?
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Mar 18, 2014
Answer : $\;\large\frac{x}{m}=\large\frac{a}{b}$Explanation :According to Langmuir isotherm$\large\...
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Which of the following is used to produce smoke screens ?
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Mar 18, 2014
Answer : Calcium phosphideExplanation :$CaP_{2}+6H_{2}O \quad \to \quad 3 Ca(OH)_{2}+2 PH_{3}$Phosp...
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Which one of the following forms micelles in aqueous above certain concentration .
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Mar 18, 2014
Answer : Dodecyltrimetthylamonium chlorideExplanation :Dodecyl trimethyl ammonium chloride $\;[C_{1...
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The volume of a couridal particle , $\;V_{c}\;$ as compared to the volume of a solute particle , $\;V_{s}\;$ in a true solution could be
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Mar 18, 2014
Answer : $\large\frac{V_{c}}{V_{s}} \approx 10^{3}$Explanation :For a true solution , the diameter...
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In Zeigler-Natta polymerization of ethylene the active spices is
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Mar 18, 2014
Answer : $\;Ti^{3+}$Explanation :$Ti^{3+}\;$ Species from $\;Ticl_{3}\;$ compound having active ...
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Milk can be preserved by adding a few drops of
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Mar 18, 2014
Answer : Formaldehyde solutionExplanation :Formaldehyde kills the micro - organisms which spoils ...
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Glucose reacts with phenylhydrazine to form
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Mar 18, 2014
Answer : Glucose phenylhydrazoneExplanation :Glucose $\;\quad \underrightarrow{C_{6}H_{5}NHNH_{2}...
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Which of the following natural sugar is the sweetest ?
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Mar 18, 2014
Answer : FructoseExplanation :Sugar $\qquad \;\;\; \qquad \;\;\; \quad$ ...
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Proteins $\large\xrightarrow {Hydrolysis}$ $A$ $\large\xrightarrow {Hydrolysis}$ $\alpha-$ Aminoacids
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Mar 18, 2014
Answer : PeptidesAll proteins on partial hydrolysis give peptides of varying molecular masses whic...
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Which enzyme helps in the formation of Maltose from starch ?
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Mar 18, 2014
Answer : ZymaseExplanation :$2(C_{6}H_{10}O_{5})_{n} +nH_{2}O \quad \overrightarrow{Diastase} \qu...
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The catalyst required for acetylation of glucose is
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Mar 18, 2014
Answer : $Zncl_{2}$Explanation :Glucose + Acetic antydride $\;\underrightarrow{Zncl_{2}}_{Heat}...
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Which of the following is D(+) glyceraldehyde ?
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Mar 18, 2014
Answer : https://clay6.com/mpaimg/3_figure2.PNGExplanation :Glyceraldehyde $\;(C_{3}H_{6}O_{3})\;$...
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A dye imparts red colour on fabric . What colour of light was absorbed by the dye ?
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Mar 17, 2014
Answer : GreenExplanation :Green is complementary for colour of red .When organic molecules are ...
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An azo dye is formed by interaction of an aromatic diazonium chloride with
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Mar 17, 2014
Answer : a phenolExplanation :An azo dye are generally formed as a result of coupling reaction be...
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Red ink is prepared from
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Mar 17, 2014
Answer : EosinExplanation :Eosin is a dye used to prepare red ink .
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The substances which affect the central nervous system and induce sleep are called
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Mar 17, 2014
Answer : tranquilizersExplanation :The drugs given to the patients suffering from anxiety and m...
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The antiseptic present in Dettol is
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Mar 17, 2014
Answer : ChloroxylenolExplanation :Chloroxylenol , is one of the antiseptic present in Dettol .
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Which of the following is a common antacid ?
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Mar 17, 2014
Answer : $\;Mg(OH)_{2}$Explanation :Magnesium hydroxide , $\;Mg(OH)_{2}\;$ is common antacid .
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Penicillin was first discovered by
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Mar 17, 2014
Answer : Alexander FlemingExplanation :Penicillin was discovered by Alexander Fleming .
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A substance which can act both as an antiseptic and disinfectant is
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Mar 17, 2014
Answer : PhenolExplanation :Phenol can act both as an antiseptic $\;(0.2 \%)\;$ as well as a disi...
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' Placebo ' is often given to patients it is :
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Mar 17, 2014
Answer : a sugar pillExplanation :' Placebo ' is just a sugar pill .
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The drug used as an anti - depressant is
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Mar 17, 2014
Answer : LuminalExplanation :Luminal is used as an antidepressant .Luminal is used to control se...
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Artificial sweetener used in soft drinks is :
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Mar 17, 2014
Answer : AspartaneExplanation :Aspartane can be used only in cold drinks and cold foods because...
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Which of the following is a sex - attractant pheromone ?
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Mar 17, 2014
Answer : MuscalureExplanation :Muscalure is a sex - attractant which is secreted by female insec...
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Which of the following is an insecticide ?
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Mar 17, 2014
Answer : DDTExplanation :Dichloro Diphenyl Trichloroethane (DDT) is a colorless , crystalline ,...
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Which is plant growth inhibition ?
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Mar 17, 2014
Answer : Abscisic acidExplanation :Abscisic acid is a plant growth inhibitor .
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Which of the following is a broad spectrum antibiotic ?
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Mar 17, 2014
Answer : ChloramphenicolChloramphenicol is a broad spectrum antibiotic . Since it is effective ag...
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Which of the following medicines is required against malaria ?
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Mar 17, 2014
Answer : ChloroquineExplanation :Chloroquine is a 4 - aminoquinoline drug used in the treatment ...
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Alizarin belongs to the class of
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Mar 17, 2014
Answer : Mordant dyesExplanation :Alizarin belongs to the class of Mordant dyes since it gives...
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Which of the following is a triphenylmethane dye ?
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Mar 17, 2014
Answer : Malachite greenExplanation :Malachite green is a triphenylmethane dye . As the name su...
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To which class of dyes does phenolphthalein belong ?
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Mar 17, 2014
Answer : phthalein dyesExplanation :Phenolphthalein is a typical dye belonging to the class whic...
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A medicine which promotes secretion of urine is called
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Mar 17, 2014
Answer : diureticExplanation : Diuretics promotes secretion of urine .
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Luminal , a barbiturate drug is used as an/a
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Mar 17, 2014
Answer : sedativeExplanation :Luminal is a derivative of barbituric acid . Derivatives are barbit...
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Which of the following drugs is an analgesic ?
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Mar 17, 2014
Answer : AnalginExplanation :Analgin is a common analgesic .
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Further growth of cancerous cells in the body is arrested by ?
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Mar 17, 2014
Answer : ChemotherapyExplanation :Further growth of cancerous cells in the body is arrested by che...
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Morphine is
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Mar 17, 2014
Answer : an alkaloidExplanation :Morphine is an alkaloid & an analgesic
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Which of the following medicines brings down the temperature of the body ?
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Mar 17, 2014
Answer : AspirinExplanation :Aspirin is an antipyretics . The chemical substances used to bring do...
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Aspirin is chemically called
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Mar 16, 2014
Answer : Acetylsalicyclic acidExplanation :https://clay6.com/mpaimg/2_figure20.PNGo - acetylsalicyc...
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In india which dye of the following was prepared from a plant grown on a large scale in india ?
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Mar 16, 2014
Answer : IndigioExplanation :Indigo , at one time , was obtained from indigo plant (indigofera t...
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Which of the following is an alkaloid ?
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Mar 16, 2014
Answer : AllExplanation :Nicotine , Piperine and quinine are alkaloids . These are delivered fro...
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