ABC26PH0121 · The osmotic pressure ( pi ) of a polymer sample at different concentrations (c) was measured at T(K). A plot of ( pi /c) versus c gave a… · DEC 2011
ABC26PH1171 · The osmotic pressure ( pi ) of a polymer sample at different concentrations (c) was measured at T(K). A plot of ( pi / c) versus c gave a… · DEC 2011
ABC26PH1173 · A polymer sample has the following composition. The polydispersity index (P.D.I) of the polymer is · JUNE 2012
ABC26PH0123 · For a polydispersed macromolecular colloid, osmometry gives · DEC 2014
ABC26PH1178 · For a polydispersed macromolecular colloid, osmometry gives · DEC 2014
ABC26PH0124 · A sample experiment revealed that PVC formed in the medium has (Mn )=13, and (Mw )=16, where (Mn ) stands for the number average molar mass… · DEC 2014
ABC26PH1179 · A sample experiment revealed that PVC formed in the medium has (Mn )=13, and (Mw )=16, where (Mn ) stands for the number average molar mass… · DEC 2014
ABC26PH1185 · The correct expression for the product ( (Mn ) ( (Mw ) ) ) [ ( (Mn . . . and ( (Mw . . are the number average and weight average molar… · DEC 2015
ABC26PH1191 · A polymer has the following molar mass distribution The calculated number average molar mass ( Mn )of the polymer is · DEC 2017
ABC26PH1200 · A sample of polysterene is composed of three weight fractions: 0.20,0.50 and 0.30 . The molecular weight of these fractions are… · DEC 2019
Polymer Chemistry – General
ABC26PH1170 · There are several types of mean molar masses for polymer and they are dependent on experimental methods like: (1) Osmometry (2) Light… · JUNE 2011
ABC26PH0125 · Among the following figures, the variations of mass adsorbs with pressure for a monolayer and a multilayer are represented by A = Monolayer… · DEC 2014self-practice
ABC26PH1180 · Among the following figures, the variations of mass adsorbs with pressure for a monolayer and a multilayer are represented by · DEC 2014
ABC26PH1182 · The stability of a lyophobic colloid is the consequence of · JUNE 2015
ABC26PH1183 · Find the probability of the link in polymers where average values of links are (1) 10, (2) 50 and (3) 10 · JUNE 2015
ABC26PH1184 · The correct form for a simple Langmuir isotherm is · DEC 2015
ABC26PH1186 · The average end-to-end distance of a random coil polymer of 106 monomers (in units of segment length) is · DEC 2015
ABC26PH1187 · The condensation of hydroxy acid produces a polyster with the probability of linkage at both ends being p . The mole fraction of k-mer… · JUNE 2016
ABC26PH1188 · Distribution of molar masses in a typical polymer sample is shown below The A, B and C represent · DEC 2016
ABC26PH1189 · For a monodisperse polymer, the number-average molar mass (MN ) and weight-average molar mass (Mw ) are related according to · JUNE 2017
ABC26PH1190 · A polydisperse polymer sample has ten molecules of molar mass 20,000 g mol-1 and fifteen molecules of molar mass 10,000 g mol-1. The… · JUNE 2017
ABC26PH1192 · A 5 g / L polymer solution is prepared with a polymer whose molar mass is 25 kg the osmotic pressure (in atm) of this solution at 25°C is… · JUNE 2018
ABC26PH1193 · The dispersity of a polymeric sample is · DEC 2018
ABC26PH1194 · The contour and root mean square length (in nm ) of a polymer chain modelled as a random coil, with N=1000 and =150 pm, are closest to · DEC 2018
ABC26PH1197 · In a polymer of N monomer units, the root mean square separation between the two ends is proportional to · DEC 2019
Polymer – General
ABC26PH0515 · Amongst the following, the metal that does NOT form homoleptic polynuclear carbonyl is · 2005-2021
ABC26PH0122 · The addition polymerization of M (monomer) involves the following stages: (I=initiator, R=free radical) arrayl I k1 R (initiation) \\ R+M… · DEC 2011
ABC26PH1172 · The addition polymerization of M (monomer) involves the following stages: ( I= initiator, R= free radical) The rate constant for free… · DEC 2011
ABC26PH1174 · During the addition polymerization, the reaction proceeds via · JUNE 2012
ABC26PH1176 · In radical chain polymerization the quantity given by the 'rate of monomer depletion, divided by the rate of propagating radical formation'… · JUNE 2014
ABC26PH1177 · The fraction of groups condensed at time in any stepwise condensation polymerization (overall second order) reaction is · DEC 2014
ABC26PH1195 · The degree of polymerisation (<N>) and the fraction of monomer consumed (P) for apolymerization reaction are related as · JUNE 2019
ABC26PH1196 · The reaction rate of a self-catalyzed polyesterification reaction is given as -(d[COOH])/dt=k[COOH]2[OH] If [M] is the initial… · JUNE 2019self-practice
ABC26PH1198 · The degree of polymerization at t=10 h of a polymer formed by a stepwise process with polymerization rate constant of 3 10-2 M-1 s-1 and an… · DEC 2019
Viscometry Characterisation
ABC26PH1175 · The number-average molar mass (MN ) and weight-average molar mass (Mw ) of a polymer are obtained respectively by · JUNE 2012
ABC26PH1181 · The intrinsic viscosity depends on the molar mass as []=KMa. The empirical constants K and a are dependent on · JUNE 2015
ABC26PH0126 · Using standard equation for intrinsic viscosity []=KMva for a solution of polymer and any information from the graph identify viscosity… · DEC 2019
ABC26PH1199 · Using standard equation for intrinsic viscosity []=K Mva for a solution of polymer and any information from the graph identify viscosity… · DEC 2019