629 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.
ABC26PH0452 · For 1 mole of a monoatomic ideal gas, the relation between pressure (p), volume (V) and average molecular kinetic energy () is · Gases – General
ABC26PH0453 · A 2 L vessel containing 2 g of H2 gas at 27 C is connected to a 2 L vessel containing 176 g of CO2 gas at 27 C. Assuming ideal behaviour of… · Gases – General
ABC26PH0455 · A molecule has a 2-fold axis and a mirror plane perpendicular to that. The point group must have a · Symmetry Elements Point Groups
ABC26PH0456 · The symmetry elements that are present in BF3 are · Symmetry Elements Point Groups
ABC26PH0457 · The S2 operation on a molecule with the axis of rotation as the z axis, moves a nucleus at (x, y, z) to · Group Theory – General
ABC26PH0458 · The number of distinct symmetry operations that can be performed on the molecule is: · Symmetry Elements Point Groups
ABC26PH0459 · The number of irreducible representations of the point group of the molecule is: · Character Tables
ABC26PH0460 · If two H atoms of the above molecule are also replaced by F atoms, the point group of the resultant molecule will be · Symmetry Elements Point Groups
ABC26PH0461 · The point group of NSF3 is: · Symmetry Elements Point Groups
ABC26PH0462 · The Td point group has 24 elements and 5 classes. Given that it has two 3 - dimensional irreducible representa tion, the number of one… · Character Tables
ABC26PH0463 · The point group of ClF3 molecule and its corresponding number of irreducible representation are respectively. · Character Tables
ABC26PH0464 · Symmetry operations of the four C2 axes perpendicular to the principle axis belong to the same class in the point group (s) · Symmetry Elements Point Groups
ABC26PH0465 · The point group symmetryof CH2=C=CH2 is · Symmetry Elements Point Groups
ABC26PH0466 · Conversion of boron trifluoride to tetrafluoroborate accompanies · Group Theory – General
ABC26PH0467 · The number of C2 axes in CCl4 is ____ · Group Theory – General
ABC26PH0468 · The character table for a pyramidal AB3 molecule of C3 v point group is given below: The reducible representation of pyramidal AB3 is The… · Reducible Representations
ABC26PH0469 · The mirror image of the above text about the x -axis is · Group Theory – General
ABC26PH0470 · A gaseous sample on exposure to total radiant energy of 6.626 J at 300 nm results in the photodissociation of 10-3 mol of this sample… · Kinetics – General
ABC26PH0471 · A reaction follows second order rate law, -d[A] / dt=k[A]2, if · Kinetics – General
ABC26PH0472 · Consider an exothermic reaction A k-1k1 I as the temperature increases · Kinetics – General
ABC26PH0473 · One gram of 90 Sr gets converted to 0.953 g after 2 years. The half life of 90 Sr, and the amount of 90 Sr remaining after 5 years are · Kinetics – General
ABC26PH0474 · A reaction proceeds through the formation of an intermediate B in an unimolecular reaction A ka B kb C The integrated rate law for this… · Kinetics – General
ABC26PH0475 · If ka kb, then concentration vs. time plot for the above reaction is: 1 · Kinetics – General
ABC26PH0476 · A solution containing 47 ppm of a compound X (FW 225) has a transmittance of 29.7 \% in a 1.5 cm cell at 400 nm. The molar absorptivity in… · Photochemistry – General
ABC26PH0477 · The percent transmittance of 8 10-5 M solution of KMnO4 is 39 . when measured at 510 nm in a cell of path length of 1cm. The absorbance and… · Photochemistry – General
ABC26PH0478 · The absorption maxima of two dyes X and Y are 520 and 460 nm , respectively. The absorbance data of these measured in a 1 cm path length… · Photochemistry – General
ABC26PH0479 · A solution containing a metal complex absorbs at 480 nm with molar extinction coefficient of 15,000 L mol-1 cm-1. If the path length of the… · Photochemistry – General
ABC26PH0480 · Fluorescence quantum yield and fluorescence lifetime of a molecule are 0.4 and 5 10-9 s, respectively. If the fluorescence decay rate… · Photochemistry – General
ABC26PH0481 · 6(2012) 7(544\%) · Photochemistry – General
ABC26PH0482 · The molar absorption coefficient of a substance dissolved in cyclohexane is 1710\,L\,mol-1\,cm-1 at 500 nm. The reduction in intensity of… · Photochemistry – General
ABC26PH0484 · In Freundlich isotherm, a linear relationship is obtained in the plot of ( theta = surface coverage and p= partial pressure of the gas) · Physical Properties – General
ABC26PH0485 · Adsorption of N2 on TiO2 was carried out at 75 K. A plot of z/((1-z)V) versus z\,(z=p/p0) gives a straight line with an intercept… · Physical Properties – General
ABC26PH0486 · The moment of iertia of a homonuclear diatomic molecular is 7.510-45\,kg\,m2. Its rotational partition function at 500 K is ____ · Physical Spactra – General
ABC26PH0487 · A plot of osmotic pressure against concentration (gL-1 ) of a polymer is constructed. The slope of the plot · Physical Spactra – General
ABC26PH0488 · Out of the following, the one which is not an excitation source for IR spectrometer is · Physical Spactra – General
ABC26PH0489 · The zero-point energy of the vibration of 35 Cl2 mimicking a harmonic oscillator with a force constant k=2293.8 Nm-1 is · Physical Spactra – General
ABC26PH0490 · The molecular active in rotational microwave, infrared absorption as well as rotational Raman spectra is: · Physical Spactra – General
ABC26PH0491 · The selection rules for the appearance, of P branch in the rotational - vibrational absorption spectra of a diatomic molecule within rigid… · Physical Spactra – General
ABC26PH0492 · The rotational constant for CO in the ground and the first excited vibrational states are 1.9 and 1.6\,cm-1, respectively. The % change in… · Physical Spactra – General
ABC26PH0493 · The fundamental transition (cm-1 ) of the diatomic molecule is at: · Physical Spactra – General
ABC26PH0494 · The anharmonicity constant (cm-1 ) of the diatomic molecule is: · Physical Spactra – General
ABC26PH0495 · The fundamental vibrational wavenumbers for H2 and I2 are 4403.2 cm-1 and 214.5 cm-1, respectively. The relative population of the first… · Physical Spactra – General
ABC26PH0496 · The rotational Raman spectrum of 19 F2 shows a series of Stokes lines at 19230.769 cm-1, 19227.238 cm-1 and 19223.707 cm-1. The rotational… · Physical Spactra – General
ABC26PH0497 · The most populated rotational state for HCl (B=8.5 cm-1 ) at 300 K is: · Physical Spactra – General
ABC26PH0498 · The ratio of life times of two states that gives rise to line widths of 1.0 cm-1 and 0.2 cm-1 respectively is: · Physical Spactra – General
ABC26PH0499 · The region of electromagnetic spectrum employed in the electron spin resonance (ESR) spectroscopy is: · Physical Spactra – General
ABC26PH0500 · The point group symmetry of the given planar shape is: · Physical Spactra – General
ABC26PH0501 · The frequency of radiation (in cm-1 units) required to vibrationally excite the molecule from v=0 to v=1 state is · Physical Spactra – General