Polymer Chemistry

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… · 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… · DEC 2014

ABC26PH1185 · The correct expression for the product (Mn · Mw) [Mn and Mw are the number average and weight average molar masses, respectively, of a… · 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

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

ABC26PH1182 · The stability of a lyophobic colloid is the consequence of · 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 chain… · 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

ABC26PH1193 · The dispersity of a polymeric sample is · DEC 2018

ABC26PH1197 · In a polymer of N monomer units, the root mean square separation between the two ends is proportional to · DEC 2019

ABC26PH0515 · Amongst the following, the metal that does NOT form homoleptic polynuclear carbonyl is · 2005-2021

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 () 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 2019 self-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… · DEC 2019

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 [ eta] = KMa. The empirical constants K and a are dependent on · JUNE 2015

ABC26PH0126 · Using standard equation for intrinsic viscosity [ eta]=KMva for a solution of polymer and any information from the graph identify viscosity… · DEC 2019

ABC26PH1199 · Using standard equation for intrinsic viscosity [ eta]=KMva for a solution of polymer and any information from the graph identify viscosity… · DEC 2019