94420 + Interview Questions in Chemistry in Class 12 Page 1770 InterviewSolution

88451.	A mixture of twosalt was treated as follows : i. The mixturewas heatedwith magnanese dioxide andconcentratedsulphuric acid , when a yellowish -greengaswas liberated. ii. The mixture onheatingwithsodiumhydroxidesolutiongave a gaswhich turnedred litmusblue iii. Itssolution in watergave a blue precipitatewith potassiumferricyanide andredcolourtionwith ammoniumthiocynate iv. The mixture was boiled with potassium hydroxide and the libratedgas was bubbledthrough an alklinesolutionof K_(2)HgI_(4)to give a brownprecipitateidentifythe two salts givesionic equationfor thereactioninvolvedin the tests (i) , (ii) and (iii).
Answer» Solution :The maxiturecontain `Fe^(2+) ,NH_(4)^(oplus) + CI^(Theta)` ions (with an impurity of `Fe^(3+)` ions) `rarr "Test of" NH_(3)` is confirmed. `rarr "Mixture must be containing" NH_(4)Cl` `Cl^(Theta) + MnO_(2) + H_(2)SO_(4) to underset("Greenish yellow")(Cl_(2)) uarr GAS + MnSO_(4)` Mixture + `NaOH to NH_(4)OH underset(NaOH)(to) NH_(3) uarr overset(Red)underset("Litmus")(to)` blue `underset(KOH)(Boil) gas overset(K_(2)H_(2)I_(4))(to)` brown `NH_(3)` confirmed `NH_(4)Cl` is confirmed. Now `Fe^(2+) + K_(4)[(FeCN)_(6)] to underset("Ferro-ferri cyanide")(Fe[Fe(CN)_(6)]_(2)`) blue `rarr` Mixture contains `FeCl_(2)` Last is interseting as it signifies presence of `Fe^(3+) (Fe^(3+) + NH_(4)CNS to Fe(SCN)_(3)]` Either `Fe^(2+) overset("Oxidised")(to) Fe^(3+)` or may be mixture contains `FeCl_(3)`

Discussion

88452.	A mixture of two salts is not water soluble but dissolves completely in dil HCl to form a colourless solution. The mixture could be :
Answer» `AgNO_(3)` and KBR ` BaCO_(3)` and ZnS ` FeCl_(3)` and `CaCO_(3)` `Mn(NO_(3))_(2) MgSO_(4)` Answer :B

Discussion

88453.	A mixture of two organic compounds was treated with sodium metal in ether solution Isobutane was obtained as a product . The two chlorine compounds are :
Answer» METHYL CHLORIDE and PROPYL chloride Methyl chloride and ETHYL chloride isopropyl chloride and methyl chloride Isopropyl chloride and ethyl chloride Answer :C

Discussion

88454.	A mixture of two organic compound is added to cold water. After filtration, water-insoluble compound (A) burns with a smoky flame and it does not respond to Lassaigne's and Beilsteins test. When a small amount of this is added to NaHCO_(3) solution, a colourless gas is evolved with effervescene. when this comopound is heated with CH_(3)OH in acidic medium, it gives the characteristic smell of oil of wintergreen. compound (B), which is water soluble, burns with a non-smoky flame and its sodium extract is prepared with cane sugar. It gives the Prussian blue colour with freshly prepared solutions of FeSO_(4)+2-3 drops NaOH and with few drops of H_(2)SO_(4). when a small amount of this compound is heated in a dry test tube, a colourless gas is evolved that turns moist red litmus paper blue and a white residue is left. this white residue is dissolved in water and a drop of CuSO_(4) is added in the basic medium -a violet colour is obtained. identify the compounds (A) and (B) with the help of the reactions involved.
Answer» Solution :(i) Compound `(A)` is insoluble in water and burns with a smoky flame, hence it should be an aromatic compound. (ii) It has no specific element such as `N,S` and halogens and gives `CO_(2)` gas with `NaHCO_(3)` solution, hence it should contain `(-COOH)` group. (iii) It gives oil of wintegreen (methyl salicylate) with `CH_(3)OH` in acidic medium, hence it is salicylic acid. (iv) Compound `(B)` is water soluble and burns with a non-smoky flame. hence it should be an aliphatic compound. (V) This compound has less carbon content because its sodium extract is prepared with sucrose and it gives PRUSSIAN blue colour with freshly prepared solution of `FeSO_(4)+2-3` drops of `NaOH` and a few drops of `H_(2)SO_(4)`, hence it is nitrogen-containing compound. `NaCN+FeSO_(4)toNa_(4)[FE(CN)_(6)]+Na_(2)SO_(4)` `FeSO_(4)overset([O])toFe_(2)(SO_(4))_(3)` `3Na_(4)[Fe(CN)_(6)]+3Fe_(2)(SO_(4))_(3)toFe_(4)[Fe(CN)_(6)]_(3)+6Na_(2)SO_(4)` (vi) On heating, it gives ammonia gas, which turns red litmus blue. hence, it contains `(-COONH_(2))` group. (vii) It ALSO gives the biuret test. `2NH_(2)CONH_(2)overset(triangle)toNH_(2)CONHCONH_(2)+NH_(3)uarr` `NH_(2)CONHCONH_(2)overset(Cu^(2+))to`violet colour Hence, this compound is urea `(NH_(2)CONH_(2))`.

Discussion

88455.	A mixture of two or more than two amino acids are separated by
Answer» Osmosis Ultracentrifugation ELECTRODIALYSIS ELECTROPHORESIS SOLUTION :Electrophoresis

Discussion

88456.	A mixture of two organic chlorie compounds was treated with sodium metal in ether solution. Isobutane was obtaned as a product. The two chlorine compounds are
Answer» Methyl chloride and propyl chloride Methyl chloride and ETHYL chloride isopropyl chloride and methyl chloride Isopropyl chloride and ethyl chloride Solution :`underset("Isopropylchloride")(CH_(3)-underset(CH_(3))underset(\|)(C)H-Cl)+2Na+underset("Methyl chloride")(Cl-CH_(3))underset(ether)OVERSET(dry)tounderset("Isobutane")(CH_(3)-underset(CH_(3))underset(\|)(C)H-CH_(3))+2NaCl`

Discussion

88457.	A mixture of two moles of carbon monoxide and mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide. If DeltaH is the enthalpy change and DeltaE is the change in interval energy, then
Answer» `DeltaH gt DeltaE` `DeltaH LT DeltaE` `DeltaH = DeltaE` the RELATIONSHIP depends on the CAPACITY of the vessel. Answer :B

Discussion

88458.	A mixture of two moles of carbon monoxide and one mole of oxygen, in a closed vessel is ignited to convert the carbon monoxide to carbon dioxide. If DeltaH is the enthalpy change and DeltaE is the change in internal energy, then
Answer» `DELTAH gt DeltaE` `DeltaH LT DeltaE` `DeltaH = DeltaE` The relationship depends on the capacity of the vessel Solution :Formation of `CO_(2)` from CO is an EXOTHERIC reaction, heat is evolved from the system, i.e., energy is lowered. THUS, EXOTHERMIC reactions occur spontaneously on account of decrease in enthalpy of system. Thus, `DeltaE gt DeltaH`.

Discussion

88459.	A mixture of two immiscible liquids water and nitrobeneze boiling at 372 K has partial vapour pressures of water 733 mm and nitrobenzene 27 mm. Calculate the weigth ratio of liqid components in distillate.
Answer» ANSWER :D

Discussion

88460.	A mixture of two gases, having partial pressure P_1 and P_2 has total pressure P, then according to Dalton's law :
Answer» <P>`P =P_1 + P_2` `P = SQRT (P_1 + P_2)` `P = P_1 XX P_2` `P = (P_1 + P_2)/2` ANSWER :A

Discussion

88461.	A mixture of two gases AsH_(3) and SbH_(3) is passed through a tube heated at the middle position. Two mirror like depositions are observed of which (I) is before the hot position and (II) is after the hot position. These depositions I and II are of
Answer» SB and As As and Sb Both As Both Sb Answer :A

Discussion

88462.	A mixture of two enantiomers in equimolar proportions is optically _____(Active, Inactive)
Answer» ANSWER :INACTIVE

Discussion

88463.	A mixture of two completely miscible non-ideal liquids which distill as such without change in its composition at a constant temperature as though it were a pure liquid. This mixture is known as
Answer» BINARY LIQUID mixture Azeotropic mixture EUTECTIC mixture IDEAL mixture Answer :B

Discussion

88464.	A mixture of two amino acids having pl 9.60 and 5.40 can be separated
Answer» by adjusting the pH of the solution at 9.60 by adjusting the pH of the solution at 5.40 by adjusting the pH of the solution at 7.0 by adjusting the pH of the solution at 14.0 Solution :Every amino acid exists exclusively as dipolar ion when the pH of the solution is equal to its isoelectric POINT (pl), HENCE at this pH it does not migrate to either electrode, while at other pH, an amino acid migrates either to CATHODE or to anode DEPENDING upon its pH. Thus, at pH 9.60, amino acid with pl 5.40 will exist as an anion and migrate to anode while that with pl 9.60 will not migrate to any electrode. SIMILARLY, at pH 5.40, amino acid with pl 9.60 will exist as cation and migrate to either electrode.

Discussion

88465.	A mixture of two amino acids having p1 9.60 and 5.40 can be separated
Answer» by ADJUSTING the pH of the solution at 9.60 by adjusting the pH of the solution at 4.20 by adjusting the pH of the solution at 7.0 by adjusting the pH of the solution at 7.5 Solution :EVERY amino acid EXISTS exclusively as dipolar ion when the pH of the solution is equal to its isoelectric point (pl), hence at this pH it does not migrate to EITHER electrode, while at other pH, an amino acid migrates either to cathode or to anode depending UPON its pI.Thus at pH 9.60, amino acid with pl 5.40 will exist as an anion and migrate to anode, while that with pl 9.60 will not migrate to any electrode.

Discussion

88466.	A mixture of TiCl_(4) with Al(CH_(3))_(3) is used as Zieglar catalyst for the manufacture of
Answer» POLYBUTADIENE. PVC. rubber. polythene. ANSWER :D

Discussion

88467.	A mixture of three protiens, (A) (pepsin), (B) (haemo-globin), and (C ) (lysozyme) was seperated by elctrophoresis method at pH=7. The pH at isoelectric point (pI) of the proteins are pI of (A), (B), and (C ) which are 1.1,6.7, and 11.0, respectively. which of the statement are correct?
Answer» Pepsin (A) will migrate to the CATHODE. Lysozyme (C ) will migrate to the anode. Haemoglobon will not migrate. At pH=7, (A) and (C ) would PRECIPITATE out while (B) would remain in the solution. Solution :Is in a very acidic range, has more anionic groups at `pH=7`, and will migrate to the positive electrode (cathode). `(B)(PI=6.7)` is present mostlywith net zero charge and moves very littel or will not migrate. `(C )(pH=11.0)`, the very BASIC protein, EXISTS mainly in the cationic form and migrates to the negative electrode (anode). At `pI`, amino acids have least solubities, so `(B)` `(pH=6.7)`, `[pH` very close to `pH` of the mixture `(pH=7)]`, is least soluble and would precipitate out, while `(A)` and `(C )` would remain in the solution.

Discussion

88468.	A mixtureof TiCI_(4) and trialkylaluminiumis "______"
Answer» hydroformylationof obfine ZEIGLER - NattaCatalyst Interstitialcompounds FERROMAGNETIC ANSWER :B

Discussion

88469.	A mixture of three amino acids X-(pH = 3.2), Y-(pH = 5.7, and Z-(pH = 9.7) under electrophoresis at pH = 7.7, in which direction will each componeat of the mixture move?
Answer» X to anode, Y and Z to cathode X to anode Y STATIONARY, Z to cathode X to cathode, Y stationary, Z to anode X and Y to anode, Z to cathode Answer :C

Discussion

88470.	A mixture of three amines can be separated into individual one by:
Answer» CARBYLAMINE reaction Hinsberg's method Fracitonal DISTILLATION method Hofmann's method Answer :B::C::D

Discussion

88471.	A mixture of three amines A, B and C is treated with benzene sulphonyl chloride and filtered. B is obtained in the filterate. The mixture containing A and C is treated with KOH so that a becomes soluble while C does not .Now A,B and C are
Answer» Aliphatic PRIMARY , SECONDARY and tertiary Aliphatic secondary , tertiary and primary Aliphatic primary , tertiary and secondary Aliphatic tertiary , secondary and primary ANSWER :C

Discussion

88472.	A mixture of sodium acetate and soda lime is heated and the product treated with excess of chlorine in presence of bright sun light . The product is :
Answer» `CH_3COOH` `CH_2BrCOOH` `CCL_4` `CH_3Cl` ANSWER :C

Discussion

88473.	A mixture of sodium acetate and acetic acid acts as a _____.
Answer» ANSWER :BUFFER SOLUTION

Discussion

88474.	A mixture of SO_3,SO_2" and "O_2 gases in a 10.0 litre flask is maintained at a temperature at which the equilibrium constant Kc of the reaction is 100. 2SO_(2(g))+O_(2(g)) hArr 2SO_(3(g)) . If the number of moles of SO_2" and "SO_3 in the flask are equal, the number of moles of O_2 present is
Answer» `0.01` `0.1` `1.0` `10.0` ANSWER :B

Discussion

88475.	A mixture of salts was treated to determine the barium constent. A 0.230 g sample was dissolved and treated with excess potassium chromate. The precipitate of BaCrO_(4) was dissolved in dil HCl to convert BaCrO_(4) to Cr_(2)O_(7)^(2-) anion. The solution treated with excess sodium iodide and trilodide produced was titrated with 21 mL of 0.095 M sodium thiosulphate. Calculate the % of BaCl_(2). 2H_(2)O in the sample. [Given Molar mass of BaCl_(2.2H2O)=244]
Answer» `70.5%` `30.25%` `15.12%` `110%` ANSWER :A

Discussion

88476.	A mixture of salts (Na_(2)SO_(3)+K_(2)Cr_(2)O_(7)) in most tube is treated with dil. H_(2)SO_(4) and resulting gas is passed through lime water . Which of the following observations is correct about this test ?
Answer» Solution in test tube becomes green and LIME water TURNS milky Solution is test tube is colourless and lime water turns milky. Solution in test tube becomes green and limewater remains clear Solution in test tube remains clear and lime water also remains clear. Solution :`Na_(2)SO_(3)` reactswith dilute `H_(2)SO_(4)` to give `SO_(2)` gas which reacts with `K_(2)Cr_(2)O_(7) +` DIL`H_(2)SO_(4)` togive a green solutiondue to THEFORMATION of `Cr_(2)(SO_(4))_(3)`. As wholeof `SO_(2)` gas reacts AWAY ,on passing the resulting gas throughlime water, it remainsclear.

Discussion

88477.	A mixture of salts (Na_(2)SO_(3)+K_(2)Cr_(2)O_(7)) in a test tube is treated with dil. H_(2)SO_(4) and resulting gas is passed through lime-water. Which of the following observations is correct about this test
Answer» Solution in test tube becomes green and lime-water turns milky Solution in test tube is colourless and lime-water turns milky Solution in test becomes green and lime-water REMAINS clear Solution in test tube remains clear and lime-water also reamains clear. Solution :`Na_(2)SO_(3)` with dil. `H_(2)SO_(4)` produces `SO_(2)` gas which turns `K_(2)Cr_(2)O_(7)` and lime water into green and milky, respectively. `Na_(2)SO_(3)+H_(2)SO_(4)toNa_(2)SO_(4)+H_(2)O+SO_(2)uarr` `K_(2)Cr_(2)O_(7)+H_(2)SO_(4)+SO_(2)toK_(2)SO_(4)+Cr_(2)UNDERSET("green")((SO_(4)))_(3)+H_(2)O` `Ca(OH)_(2)+SO_(2)tounderset("milky")(CaSO_(3))+H_(2)O`

Discussion

88478.	A mixture of salt and water can be separated by
Answer» Filtration Decentation Crystallisation Kept LONG standing Answer :C

Discussion

88479.	A mixture of pure H_(2) and O_(2) can be stored indefinitely without any reaction. Name the catalyst which makes the reaction to occur with explosive violence.
Answer»

Discussion

88480.	A mixture of pure AgCl and pure AgBr is foundto contain 60.94%Ag by mass. Whatare mass percentages of Cland Br in themixture ?(Ag = 108 , Cl = 35 . 5 Br = 80)
Answer» Solution :Let us first calculate the weight ratio of AgCland AgBr, theirwts. being supposed to be x and y, g respectivelyin themixture. Apply POAC for AG atoms AgCl + AgBr `to` Ag `1 xx ` moles of AgCl + ` 1 xx ` molesAgBr = moles of Ag `(x)/( 143.5)+(y)/(188) ` = moles of Ag. `:.` wt. of Ag in the MIXTURE = `((x)/(143.5)+(y)/(188)) xx 108.g` As GIVEN , `(((x)/(143.5)+(y)/(188))xx 108)/(x + y) = 0.6094` `(x)/(y) = (0.035)/(0.1432)` `:. % ` of AgCl `= ( x xx 100)/( x + y) = (0.035)/( 0 . 035 + 0.1432) xx 100 = 19.64` and `%` of AgBr = 80.36 Thus,a 100-g MIXTURECONTAINS 19.64 g of AgCland 80.36 g ofAgBr. Now calculate the amount of Cl in AgCland the amountof Br in AgBr Wt. of Cl in 19.64 of AgCl = `(35 . 5)/( 143.5) xx 1964 = 4.85 g` Wt. of Brin 80.36 g of AgBr `= (80)/(188) xx 80.36 = 34.19 g` Thus 100 g of themixturecontains 4.85 g of Cl and 34.19 g of Br . `:.`percentage of Cl = `4.85%` and percentage of Br = `34.19%`

Discussion

88481.	A mixture of P,S and T amines is separated by :
Answer» HOFMANN METHOD Hinsberg method DISTILLATION All Answer :D

Discussion

88482.	A mixture of potassium dichromate crystal and conc. H_(2)SO_(4) was added to each of the following four tubes. It was followed by strong heating. Identify the tubes in which the following changes will be observe. Support your answer with the help of chemical equations. (a) formation of violet vapours (b)formation of yellow precipitate (c) formation fo brown liquid(d) appearance of vinegar smell.
Answer» SOLUTION :(a) Viloet vapour of `I_(2)` will appear in tube (i). (b) Yellow precipitate of sulphur will apppear in tube (ii). (c) BROWN liquid containing dissolved bromine will be noticed in tube (iv). (d) Vinegar SMELL due to acetic acid `(CH_(3)COOH)` will be notice in tube (III).

Discussion

88483.	A mixture of propyl iodide and ethyl iodide is subjected to Wurtz reaction. Which of the following hydrocarbons is not formed during the reaction ?
Answer» PROPANE BUTANE PENTANE HEXANE ANSWER :A

Discussion

88484.	A mixture of propene and methane is obtained by the cracking
Answer» 1-butene 2-butene n-butane Isobutane Solution :`UNDERSET"n-Butane"(CH_3CH_2CH_2CH_3)OVERSET"CRACKING"to CH_4+CH_3-CH=CH_2`

Discussion

88485.	A mixture of one volume of gas and two volumes of oxygen, on explosion form two volumes of CO_(2) and one volume of N_(2) under the identical conditions of temperature and pressure. Find the formula of the gas.
Answer» SOLUTION :`(C_(2)N_(2))`

Discussion

88486.	A mixture of nitrogen and water vapour is admitted to a flask which contains a solid drying agent. Immediately after admission, the pressure of the flask is 760 mm. After some hours the pressure reached a steady value of 745 mm. (a) Calculate the composition, in mole per cent, of the original mixture. (b) If the experiment is done at 20^(@)C and the drying agent increases in weight by 0.15 g, what is the volume of the flask ? (The volume occupied by the drying agent may be ignored.)
Answer» Solution :(a) `p_(N_(2)) + p_(H_(2)O) = 760 MM` `p_(N_(2)) = 745 mm` `p_(H_(2)O) = 760-745 = 15 mm`. MOLE % of `N_(2)` = pressure % of `N_(2)` `= (745)/(760) xx 100 = 98.03%`. `therefore` mole % of `H_(2)O = 100 - 98.03 = 1.975%`. (b) Since the weight of drying agent increases by 0.15 g, weight of `H_(2)O = 0.15 g`. Mol. wt of `H_(2)O = 18`. `therefore` mole of `H_(2)O = (0.15)/(18)` `p_(H_(2)O) = 15 mm = (15)/(760)` atm. Applying `PV = NRT` in the flask of volume V litres (say) `(15)/(760) xx V = (0.15) xx 0.082 (273 + 20)` `V = 10.28` litres.

Discussion

88487.	A mixture of nitrogen and water vapours is admitted to falsk at 760 torr which contains a sufficient solid dryig agent, after long time the pressure reached a stedy value of 722 torr. If the experiment is done at 27^(@)C and drying agent increaes in weight by 0.9gm, what iws the volume of flask? Neglect any possible vapour pressure of drying agent and volume occupied by drying agent.
Answer» 443.34L 246.3L 12.315L 24.63L Solution :Vapore pressure of water =760-722=38 torr `n_(H_(2)O)=(0.9)/(18)=0.05` `V=(nRT)/(P)=(0.05xx(0.0821)(300))/((38)/(760))=24.63L`

Discussion

88488.	A mixtureof naphthalene and benzoic can beseparated by :
Answer» chromatograhic sublimation fractional crystallisation distillation SOLUTION :N//A

Discussion

88489.	A mixture of nitrogen and hydrogen in a proportion of 1 : 3 by volume was subjected to a pressure of 30 atm and a temperature of 723 K. After equilibrium was established, and cooled, the analysis indicated that the mixture contained 6% of ammonia by volume. Calculate K_p
Answer» SOLUTION :`4.85 XX 10^(-5) atm^(-2)`

Discussion

88490.	A mixture of NH_(3)( g) and N_(2) H_(4)(g) is placed in a sealed vessel at 27^(@)C . The total pressure of the gas is 0.5 atm. The vessel is heated to 927^(@)C where the following decomposition reaction take place : N_(2) H_(4) rarr N_(2)(g) + 2H_(2)(g) 2NH_(3)(g) rarr N_(2)(g) + 3H_(2) ( g) The pressure in the vessel at this stage becomes 4.5 atm. The mole percent of NH_(3)(g) in the original mixture was :
Answer» 0.25 0.6 0.75 0.8 Answer :C

Discussion

88491.	A mixture of NaI and NcCl gave with sulphuric acid, Na_(2)SO_(4) equal in mass to the original mixture taken. Find the percentage composition of the mixture.
Answer» ANSWER :0.513:1

Discussion

88492.	A mixture of NaCl and K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) ,deep red vapours and formed .Which of the following statements is false?
Answer» The vapours contain `CrO_(2)Cl_(2)` only The vapours give a yellow solution with NaOH The vaopurs when passed into LEAD acetate in acetic give a yellow precipitate. The vapours contain `CrO_(2)Cl_(2)` and `Cl_(2)` Solution :`4NaCl+K_(2)Cr_(2)O_(7)+3H_(2)SO_(4)to2NaS_(2)O_(4)+K_(2)SO_(4)+2CrO_(2)Cl_(2)+3H_(2)O` CHROMYL chloride test is a C.T for `Ci^(-)` `CrO_(2)Cl_(2)+underset(("yellow"))(4NaOH)toNa_(2)Cro_(4)+2H_(2)O+2NaCl` `Na_(2)CrO_(4)+underset("yellow ppt")((CH_(3)CrO)_(2))pbtopbCro_(4)+2CH_(3)COONa`

Discussion

88493.	A mixtureof Nal and NaCl . whenheated with H_(2)SO_(4) , produced the sameweightof sodium sulphate as thatofthe originalmixture . Calculate percentage of Nal in the mixture .
Answer» ANSWER :`28 . 85%`

Discussion

88494.	A mixture of N_(2)and H_(2) in the molare ratio 1:3 attains equlibrium when 50% of mixture has reacted. If P is the total pressue of the mixture, the partial pressure of NH_(3) formed is P//y. The value of y is
Answer» Solution :`N_(2)+3H_(2)hArr2NH_(3)` `{:("Initial mole",1,3,0),("At eq.",1-x,3-3x,2x):}` `therefore` out of 4 mole of MIXTURE, 2 mole have REACTED and hence 2 mole are LEFT. `therefore1-x+3-3x=2` or `4x=2or x=0.5` `therefore"Total mole atequlibrium"=1-x+3-3x+2x=4-2x=4-2xx0.5=3` No. of mole of `NH_(3)` at equlibrium `2x=2xx0.5=1` `thereforeP_(NH_(3))=1/3xxP=P/3thereforey=3`

Discussion

88495.	A mixtureof N_(2) and H_(2) is causedto react in a closedd container to form NH_(3) . Thereaction ceases before either reactant has been totally consumed . At thisstage, 2 . 0 moleseach of N_(2), H_(2) and NH_(3) are present . The moles of N_(2) and H_(2) present originally wererespectively.
Answer» 4 and 4 MOLES 3 and 5 moles 3 and 4 moles 4 and 5 moles Answer :B

Discussion

88496.	A mixture of N_2and Ne contains equal moles of each gas and has a total mass of10.0 g. What is the density of this gas mixture at 500 K and 10 atm?
Answer» SOLUTION :5.88 g/L

Discussion

88497.	A mixture of N_2 and H_2 is caused to react in a closed container to form NH_3. The reaction decreases before any of the reactant has been totally consumed. At this stage, 2 moles each of N_2, H_2 and NH_3 are present. Then the weight of N_2 and H_2 present originally were respectively
Answer» 112 G and 8 g 84 g and 10 g 84 g and 8 g 122 g and 10 g Answer :B

Discussion

88498.	A mixture of methylamine and dimethylamine is given to you. The reagents used to separate the compenents of the mixture are
Answer» `CHCl_(3)` and HCl `C_(6)H_(5)SO_(2)` and KOH `C_(6)H_(5)SO_(2)` and HCl `CHCl_(3)` and KOH Solution :(2) A mixture of methylamine (`1^(@)` amine) and dimethylamine (`2^(@)` amine) can be separated with the help of `C_(6)H_(5)SO_(2)Cl` and KOH (Hinsberg.s method). Methylamine will form N-methylbenzenesulphonamide which is SOLUBLE in KOH. Dimethylamine will form N,N-dimethylbenzene-sulphonamide which is INSOLUBLE in KOH.

Discussion

88499.	A mixture of methyl amine and dimethyl amine is given to you. The regents used to separate the components of the mixture are :
Answer» `CHCl_(3) and HCl` `C_(6)H_(5)SO_(2)Cl and KOH` `C_(6)H_(5)SO_(2)Cl and HCl` `CHCl_(3) and KOH.` ANSWER :B

Discussion

88500.	A mixture of methanol vapours and air is passed over heated copper. The products are
Answer» CARBON monoxide and hydrogen formaldehyde and `H_2` gas . FORMIC ACID and WATER vapour carbon monoxide and water vapour Answer :B

Discussion

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A mixture of two amino acids having p1 9.60 and 5.40 can be separated

A mixture of TiCl_(4) with Al(CH_(3))_(3) is used as Zieglar catalyst for the manufacture of

A mixture of three protiens, (A) (pepsin), (B) (haemo-globin), and (C ) (lysozyme) was seperated by elctrophoresis method at pH=7. The pH at isoelectric point (pI) of the proteins are pI of (A), (B), and (C ) which are 1.1,6.7, and 11.0, respectively. which of the statement are correct?

A mixtureof TiCI_(4) and trialkylaluminiumis "______"

A mixture of three amino acids X-(pH = 3.2), Y-(pH = 5.7, and Z-(pH = 9.7) under electrophoresis at pH = 7.7, in which direction will each componeat of the mixture move?

A mixture of three amines can be separated into individual one by:

A mixture of three amines A, B and C is treated with benzene sulphonyl chloride and filtered. B is obtained in the filterate. The mixture containing A and C is treated with KOH so that a becomes soluble while C does not .Now A,B and C are

A mixture of sodium acetate and soda lime is heated and the product treated with excess of chlorine in presence of bright sun light . The product is :

A mixture of sodium acetate and acetic acid acts as a _____.

A mixture of SO_3,SO_2" and "O_2 gases in a 10.0 litre flask is maintained at a temperature at which the equilibrium constant Kc of the reaction is 100. 2SO_(2(g))+O_(2(g)) hArr 2SO_(3(g)) . If the number of moles of SO_2" and "SO_3 in the flask are equal, the number of moles of O_2 present is

A mixture of salts (Na_(2)SO_(3)+K_(2)Cr_(2)O_(7)) in most tube is treated with dil. H_(2)SO_(4) and resulting gas is passed through lime water . Which of the following observations is correct about this test ?

A mixture of salts (Na_(2)SO_(3)+K_(2)Cr_(2)O_(7)) in a test tube is treated with dil. H_(2)SO_(4) and resulting gas is passed through lime-water. Which of the following observations is correct about this test

A mixture of salt and water can be separated by

A mixture of pure H_(2) and O_(2) can be stored indefinitely without any reaction. Name the catalyst which makes the reaction to occur with explosive violence.

A mixture of pure AgCl and pure AgBr is foundto contain 60.94%Ag by mass. Whatare mass percentages of Cland Br in themixture ?(Ag = 108 , Cl = 35 . 5 Br = 80)

A mixture of P,S and T amines is separated by :

A mixture of propyl iodide and ethyl iodide is subjected to Wurtz reaction. Which of the following hydrocarbons is not formed during the reaction ?

A mixture of propene and methane is obtained by the cracking

A mixture of one volume of gas and two volumes of oxygen, on explosion form two volumes of CO_(2) and one volume of N_(2) under the identical conditions of temperature and pressure. Find the formula of the gas.

A mixtureof naphthalene and benzoic can beseparated by :

A mixture of nitrogen and hydrogen in a proportion of 1 : 3 by volume was subjected to a pressure of 30 atm and a temperature of 723 K. After equilibrium was established, and cooled, the analysis indicated that the mixture contained 6% of ammonia by volume. Calculate K_p

A mixture of NaI and NcCl gave with sulphuric acid, Na_(2)SO_(4) equal in mass to the original mixture taken. Find the percentage composition of the mixture.

A mixture of NaCl and K_(2)Cr_(2)O_(7) is heated with conc. H_(2)SO_(4) ,deep red vapours and formed .Which of the following statements is false?

A mixtureof Nal and NaCl . whenheated with H_(2)SO_(4) , produced the sameweightof sodium sulphate as thatofthe originalmixture . Calculate percentage of Nal in the mixture .

A mixture of N_(2)and H_(2) in the molare ratio 1:3 attains equlibrium when 50% of mixture has reacted. If P is the total pressue of the mixture, the partial pressure of NH_(3) formed is P//y. The value of y is

A mixtureof N_(2) and H_(2) is causedto react in a closedd container to form NH_(3) . Thereaction ceases before either reactant has been totally consumed . At thisstage, 2 . 0 moleseach of N_(2), H_(2) and NH_(3) are present . The moles of N_(2) and H_(2) present originally wererespectively.

A mixture of N_2and Ne contains equal moles of each gas and has a total mass of10.0 g. What is the density of this gas mixture at 500 K and 10 atm?

A mixture of N_2 and H_2 is caused to react in a closed container to form NH_3. The reaction decreases before any of the reactant has been totally consumed. At this stage, 2 moles each of N_2, H_2 and NH_3 are present. Then the weight of N_2 and H_2 present originally were respectively

A mixture of methylamine and dimethylamine is given to you. The reagents used to separate the compenents of the mixture are

A mixture of methyl amine and dimethyl amine is given to you. The regents used to separate the components of the mixture are :

A mixture of methanol vapours and air is passed over heated copper. The products are