139 questions from this paper that are in the bank. Each opens with its answer and explanation.
ABC26OR0979 · In the mass spectrum of 1,2-dichloroethane, approximate ratio of peaks at m / z values 98, 100, 102 will be · Mass Spec
ABC26OR1038 · The major product formed by photochemical reaction of (2E, 4Z, 6E)-decatriene is · Pericyclic Reactions – General
ABC26OR1039 · The major product formed in the following reaction is · Pericyclic Reactions – General
ABC26OR1040 · The following transformation involves sequential · Sigmatropic Shifts
ABC26OR1041 · A concerted [1, 3]-sigmatropic rearrangement took place in the reaction shown below. The structure of the resulting product is · Sigmatropic Shifts
ABC26OR1077 · The correct statement about the following reaction is that · Photocycloaddition
ABC26PH0871 · The standard deviation of speed ( ) for Maxwell's distribution satisfies the relation · Atomic And Molecular Term Symbols – General
ABC26PH0925 · According to the transition state theory, one of the vibrations in the activated complex is a loose vibration. The partition function for… · Chemical Kinetics – General
ABC26PH0926 · v and Km for an enzyme catalyzed reaction are 2.0 10-3 Ms-1 and 1.0 10-6 M, respectively. The rate of the reaction when the substrate… · Enzyme Kinetics
ABC26PH0927 · The first order rate constant for a unimolecular gas phase reaction A → products that follows Lindemann mechanism is 2.0 s-1 at pA=1 atm… · Rate Laws Order
ABC26PH0928 · The concentration of a reactant R varies with time for two different reactions as shown in the following plots : The orders of these two… · Chemical Kinetics – General
ABC26PH0929 · If the rates of a reaction are R1 and R2 at concentrations C1 and C2 of a reactant respectively, the order of reaction, 'n' (assuming that… · Rate Laws Order
ABC26PH0998 · In Kohlrausch law, =0- √(c), and · Conductance
ABC26PH0999 · The concentration of a MgSO4 solution having the same ionic strength as that of a 0.1 M Na2SO4 solution is · Debye Huckel
ABC26PH1000 · Given that E (Cl2 / Cl- )=1.35 V and Ksp(AgCl)=10-10 at 25 C, E0 corresponding to the electrode reaction 1/2 Cl2(g)+Ag+(Soln. )+e- AgCl(s) · Electrochemistry – General
ABC26PH1001 · The standard EMF of the cell Pt, H.g HCl soln. AgCls, Ag(s) · Nernst Cells
ABC26PH1062 · The product C2x ( C2x is the two-fold rotation axis around the x-axis and is the xy mirror plane) is · Group Theory – General
ABC26PH1063 · A molecular orbital of a diatomic molecule changes sign when it is rotated by 180 around the molecular axis. This orbital is · Group Theory – General
ABC26PH1064 · IR active normal modes of methane belong to the irreducible representation: · Character Tables
ABC26PH1118 · If the reduced mass of a diatomic molecule is doubled without changing its force constant, the vibrational frequency of the molecule will be · Molecular Spectroscopy – General
ABC26PH1119 · The molecule with the smallest rotational constant (in the microwave spectrum) among the following is · Rotational
ABC26PH1120 · The spectroscopic technique that can distinguish unambiguously between trans-1, 2 dichloroethylene and cis-1, 2-dichloroethylene without… · Rotational
ABC26PH1121 · The vibrational frequency of a homo-nuclear diatomic molecule is v. The temperature at which the population of the first excited state will… · Molecular Spectroscopy – General
ABC26PH1122 · The 1 H NMR frequency at 1.0T is 42.4 MHz. If the gyromagnetic ratios of 1 H and 13 C are 27 107 and 6.75 107 T-1 S-1 respectively, what… · Molecular Spectroscopy – General
ABC26PH1184 · The correct form for a simple Langmuir isotherm is · Polymer Chemistry – General
ABC26PH1185 · The correct expression for the product ( (Mn ) ( (Mw ) ) ) [ ( (Mn . . . and ( (Mw . . are the number average and weight average molar… · Molecular Weight Averages
ABC26PH1186 · The average end-to-end distance of a random coil polymer of 106 monomers (in units of segment length) is · Polymer Chemistry – General
ABC26PH1346 · For a simple cubic crystal lattice, the angle between the [2 0 1] plane and the xy plane is · Crystal Systems Lattices
ABC26PH1347 · For a simple cubic crystal, X-ray diffraction shows intense reflections for angles 1 and 2 which are assigned to [1 0 1] and [1 1 1]… · X Ray Diffraction Bragg
ABC26PH1392 · Though a constant shift of energy levels of a system changes the partition function, the properties that do not change are · Partition Functions
ABC26PH1393 · The standard deviation of speed ( ) for Maxwell's distribution satisfies the relation · Maxwell Boltzmann
ABC26PH1429 · Stability of lyophobic dispersions is determined by · Surface Chemistry – General
ABC26PH1480 · The value of Delta U- Delta H for the reaction Fe2 O3(s)+3 C(s) 2 Fe(s)+3 CO(g) is · Thermodynamics – General
ABC26PH1481 · If the pressure p (system) is greater than the p (surroundings), then · Laws State Functions
ABC26PH1482 · Delta H of a reaction is equal to slope of the plot of · Thermodynamics – General
ABC26PH1483 · A reversible expansion of 1.0 mol of an ideal gas is carried out from 1.0 L to 4.0 L under isothermal condition at 300 K . Delta G for this… · Thermodynamics – General
ABC26PH1484 · The temperature-dependence of the vapour pressure of solid A can be represented by p=10.0-1800/T, and that of liquid A by p=8.0=-1400 / T… · Thermodynamics – General
ABC26PH1485 · The non-spontaneous process among the following is · Free Energy Equilibria