IIT-JEECHEMISTRYP. JOYPROMOTIONAL MATTER1, 588-A, TALWANDI, KOTA ( (0744) 6450883, 2405510Q.1 A metal crystallises into a lattice containing a sequence oflayers of ABC ABC ……….. . If the radius of metal atomsis 174 pm, then the distance between the two successivelayers (i.e., A and B) is-(A) 348 pm (B) 174 pm (C) 284.2 pm (D) 492.2 pmQ.2 Barium titanate has the perovskit structure which is a cubiclattice, with barium ions occupying the corners of the unitcell, oxide ions the face centers and titanium ions thecentres. Assuming that Ti4+ ions are occupying the holesof the BaO lattice, what type of holes and what fraction ofsuch holes does the ion occupy ?(A) 50% Tetrahedral holes(B) 25% Octahedral holes(C) 100% Octahedral holes(D) 25% Tetrahedral holesQ.3 The two bulbs R and S connected by a mercury manometerare held in a thermostat (to maintain constant temp.) Volumeof R is twice the volume of S. R contains a gas X at the samepressure of nitrogen as in S. The mercury level in the rightha nd limbrises whe n temperature is increased if th e gas X is(A) Nitrogen(B) An equilibrium mixture CH3NC(g) CH3NC(g) DH is negative.(C) An equilibrium mixture N2F(g) 2NF(g) DH is positive.(D) Hydrogen.To open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR Code
IIT-JEECHEMISTRYP. JOYPROMOTIONAL MATTER2, 588-A, TALWANDI, KOTA ( (0744) 6450883, 2405510Q.4 At room temperature, N2O4(g) and NO2(g) exist inequilibrium as follows : N2O4(g) 2NO2(g) pale yellow dark brownAt gas syringe is filled with a pale brown mixture of N2O4(g)and NO2(g) at equilibrium.What would be observed when the plunger is quickly pushedin at time t ?(A) The mixture first lightens, and then becomes colourless.(B) The mixture first darkens, and then becomes colourless.(C) The mixture first darkens, and then lightens.(D) The mixture first lightens, and then darkens.Q.5 In the diagram, curve X was obtained by observing thedecomposition of 100 cm3 of 1.0 mol dm–3 hydrogenperioxide, catalysed by manganese (IV) oxide(X)(Y)TimeVolume of oxygenformedWhich alteration to the original experimental conditionswould produce curve Y ?(A) Adding water(B) Adding some 0.1 mol dm–3 hydrogen perioxide(C) Using less manganese (IV) hydrogen peroxide(D) Lowering the temperatureQ.6 Consider the given system. Vessel contains 50 gm water at273 K. It contains air saturated with water vapour at 1200mm Hg.1200 mm HgIce bathWhat will be the final pressure in the vessel after thevolume of vessel has been changed to one third (vapourpressure of water at this temperature 400 torr)(A) 3600 mm (B) 2800 mm (C) 40 mm (D) 1200 mmTo open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR Code
IIT-JEECHEMISTRYP. JOYPROMOTIONAL MATTER3, 588-A, TALWANDI, KOTA ( (0744) 6450883, 2405510Q.7 Equal volumes of 0.1M solution of NaCl and 5M solution ofNaCl are kept in a closed vessel (see figure) andtemperature is maintained constant. After equilibrium hasbeen established, assuming that volumes are additive, whichof the following is (are) true ?(A) Volume of 0.1 M solution is lesser than its original volume(B) Volume of 0.1M solution is greater than its original volume(C) Volume of 5M solution is lesser than its original volume(D) Volume of 5M solution is greater than its original volume(E) No change occurs at allQ.8 Insulin is dissolved in a suitable solvent and the osmoticpressure (p) of solutions of various concentrations (g/cm3)C is measured at 20ºC. The slope of a plot of p against C isfound to be 4.65 × 10–3. The molecular weight of the insulinis :(A) 3 × 105(B) 9 × 105(C) 4.5 × 105(D) 5.16 × 106Q.9V Lit.v Lit.Thermalinsulator’n’ mole of an ideal gas is confined in V lit. volume, byremoving the partition gas is allowed to occupy V lit. ofvacuum. The temp. of gas is T and work done in pulling thepartition is ‘O’. The change in entropy DS will be-(A) 0 (B) – nR ln 2(C) nR ln 2 (D) – nR ln 14To open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR Code
IIT-JEECHEMISTRYP. JOYPROMOTIONAL MATTER4, 588-A, TALWANDI, KOTA ( (0744) 6450883, 2405510Q.10 One more way to get from ‘A’ state ‘A’ to state ‘B’ is tofollow a direct path through state ‘F’. This process is notisobaric, isochoric, isothermal or adiabatic yet you can drawsome conclusions about its energetics using the first law ofthermodynamics. Which of the following are true for thefirst half of the process-1123APVBF452345(A) Both T and E increase(B) Work energy flows in(C) Q flows in(D) Q is larger in magnitude than wQ.11 Of the graphs below, the one that best illustrates therelationship between [H3O+(aq)] and [OH–(aq)] in a solutionis-(A) [OH]–(aq)[HO]3(aq)+ (B) [OH]–(aq)[HO]3(aq)+(C) [OH]–(aq)[HO]3(aq)+ (D) [OH]–(aq)[HO]3(aq)+To open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR Code
IIT-JEECHEMISTRYP. JOYPROMOTIONAL MATTER5, 588-A, TALWANDI, KOTA ( (0744) 6450883, 2405510Q.12 The graph below shows titration curves of 50 mL of the sixacids, Q, R, S, T, U, and V. In each case, the titrant usedwasO.lMNaOH. What was the concentration of acid S before the titration?(A) 0.05 M (B) 0.1 M (C) 0.2 M (D) 1MQ.13 Which of the following statement is correct about reaction1 & reaction 2.Reaction 1 : () /() /h/.() /FeBr12325 322 3C H Cl AlClBr alc KOHBr¾ ®¾¾¾¾¾¾n BrCH = CH2Reaction 2 : () /() /FeBr() /h/.12325 32 32C H Cl AlClBrBr alc KOH¾ ®¾¾¾¾¾¾n BrCH = CH2(A) Only reaction 1 is correct (B) Only reaction 2 is correct(C) Both reaction are correct (D) None of them are correctQ.14BrPhBrHHPh NaI(acetone)¾ ®¾ ¾¾ A, A is :(A) HPhPhH(B) HPhHPh(C) HPhHBr(D) HBrHBrTo open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR CodeTo open video solution go tohttps://ables.online/20videoorScan following QR Code