489 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.
ABC26IN0403 · The reaction of NiBr2 with two equivalents of PPh3 in CS2 at -78° C gives a red-colored diamagnetic complex. [NiBr2 (PPh3)2]. This… · Coordination – General
ABC26IN0404 · The rate of the substitution reaction of [Co(CN)5 Cl]3- with OH-to give [Co(CN)5(OH)]3- · Coordination – General
ABC26IN0405 · The yellow color of an aqueous solution of K2 CrO4 changes to red-orange upon the addition of a few drops of HCl. The red-orange complex… · Coordination – General
ABC26IN0406 · The Delta 0 of [Cr (H2 O)6]3+, [CrF6]3- and [Cr(CN)6]3- follows the order: · Coordination – General
ABC26IN0407 · The spin-only magnetic moment of [Co (H2 O)6]2+ (rounded off to one decimal place) is ____ BM. · Coordination – General
ABC26IN0408 · The correct order of increasing intensity (molar absorptivity) of the UV-visible absorption bands for the ions [Ti (H2 O)6]3+, [Mn (H2… · Coordination – General
ABC26IN0409 · A radical contains 14 N(I=1) with hyperfine constant 1.61 mT and two equivalent protons (I=1 / 2) with hyperfine constant 0.35 mT. The ESR… · Inorganic Spectroscopy – General
ABC26IN0410 · In the proton decoupled 13 C and 31 P NMR spectra of (CH3)3 P=O, the number of lines observed, respectively, are · Inorganic Spectroscopy – General
ABC26IN0411 · If ClF3 were to be stereochemically rigid, its 19 F NMR spectrum (I for 19 F=1/2) would be (assume that Cl is not NMR active) · Inorganic Spectroscopy – General
ABC26IN0413 · Upon heating, compound X is converted to Y, which has the same molecular formula as that of X. The 1H NMR spectrum of Y shows two doublets… · Inorganic Spectroscopy – General
ABC26IN0414 · The 31P NMR spectrum of P4S3 consists of · Inorganic Spectroscopy – General
ABC26IN0415 · The 1 H NMR spectrum of HD consists of a · Inorganic Spectroscopy – General
ABC26IN0417 · The extent of Mossbauer quadrupole splitting of iron follows the order · Inorganic Spectroscopy – General
ABC26IN0418 · The value of 'g' and the number of signals observed for the references standard, diphenylpicry lhydrazyl (DPPH), in the solid stae ESR… · Inorganic Spectroscopy – General
ABC26IN0419 · The 19 F NMR spectrum of ClF3 when measured at -60° C will be observed as a · Inorganic Spectroscopy – General
ABC26IN0420 · The characteristic feature of an electronic spin resonance (ESR) spectrum of frozen aqueous solution of CuSO4 · 5 H2 O at 77 K is · Inorganic Spectroscopy – General
ABC26IN0421 · In the EPR spectrum of a methyl radical, the number of the lines and their relative intensities, respectively, are · Inorganic Spectroscopy – General
ABC26IN0423 · The lanthanide complex (acac = acetylacetonate; phen = 1, 10-phennathroline) that do not have square antiprismatic structure is · Lanthanide And Actinide – General
ABC26IN0425 · The separation of trivalent lanthanide ions, Lu3+, Yb3+, Dy3+, Eu3+ can be effectively done by a cation exchange resion using ammonia o -… · Lanthanide And Actinide – General
ABC26IN0426 · The correct electronic configuration and spin only magnetic moment of Gd3+ (atomic number 64) are · Lanthanide And Actinide – General
ABC26IN0427 · The calculated and observed magnetic moments differ considerably for an aqua complex of a Lanthanide (III) ion as a result of low lying… · Lanthanide And Actinide – General
ABC26IN0428 · The lanthanide ion the exhibits color in aqueous solution is · Lanthanide And Actinide – General
ABC26IN0429 · Generally, the coordination number and the nature of the electronic absorption band (f → f transition)of lanthanide (III) ion in their… · Lanthanide And Actinide – General
ABC26IN0430 · In a uranium recovery process, an aqueous solution of uranyl ion is evaporated, dried in air at 400° C and subsequently reduced with… · Lanthanide And Actinide – General
ABC26IN0431 · The experimental magnetic moment (3.4 BM) of a hydrated salt of Eu3+ at 27°C is significantly different from the calculated value. The… · Lanthanide And Actinide – General
ABC26IN0432 · The correct statement(s) about actinides is/are: · Lanthanide And Actinide – General
ABC26IN0433 · Triplet superphosphate is made by treating phosphate rock with · Main Group Element – General
ABC26IN0434 · The incorrect statement regarding carboranes is that · Main Group Element – General
ABC26IN0435 · Mg6 Si4 O10(OH)8 is commercially known as · Main Group Element – General
ABC26IN0436 · The series with the orrect order of decreasing ionic size is · Main Group Element – General
ABC26IN0437 · When Al4 C3 and Mg2 C3 reacts with H2 O, then major products formed respectively, are · Main Group Element – General
ABC26IN0438 · Boric acid in aqueous solution in presence of glycerol behaves as a strong acid due to the formation of · Main Group Element – General
ABC26IN0439 · The compounds X and Y in the following reactio are P4 S10 EtOH(X) Cl2(Y) p-O2 NC6 H4 ONa Parathion · Main Group Element – General
ABC26IN0440 · The Lewis acid character of BF3, BCl3 and BBr3 follows the order · Main Group Element – General
ABC26IN0441 · The reaction of Al4 C3 with water leads to the formation of · Main Group Element – General
ABC26IN0442 · The correct statement about C60 is · Main Group Element – General
ABC26IN0443 · The INCORECT statement about linear dimethylopolysiloxane, [ (CH3)2 SiO]n, is · Main Group Element – General
ABC26IN0444 · The reaction of phosgene with an excess of NH3 produces · Main Group Element – General
ABC26IN0445 · The coordination number of the Ba2+ ions in barium fluoride is 8. The coordination number of the fluorie ion is: · Main Group Element – General
ABC26IN0446 · In the reaction HSO4-(aq)+OH-(aq) ⇌ SO42-(aq)+H2 O(), the conjugate acid-base pairs are · Main Group Element – General
ABC26IN0448 · The structure of triphosphazene is · Main Group Element – General
ABC26IN0449 · The Lewis acidity of BF3 is less than CBl3 even though fluorine is more electronegative than chlorine. It is due to · Main Group Element – General
ABC26IN0450 · Pyrozenes are a class of silicate minerals, which exhibit a polymeric chain structure, as shown below Its simplest repeat unit is · Main Group Element – General
ABC26IN0451 · Among the following pentachlorides the one which does not exist due to the ‘inertpair effect’ is · Main Group Element – General
ABC26IN0454 · The reaction of solid XeF2 with AsF5 in 1:1 ratio affords · Main Group Element – General
ABC26IN0455 · For Et2 AlX (X=PPh2-, Ph-, Cl-. and.H-), the tendency towards dimeric structure follows the order · Main Group Element – General
ABC26IN0457 · The total charge on pentaphosphate anion is: · Main Group Element – General
ABC26IN0458 · The enthalpies of hydration of Ca2+, Mn2+ and Zn2+ follow the order · Main Group Element – General
ABC26IN0459 · Among the following substituted silanes, the one that gives cross-linked silicone polymer upon hydrolysis is · Main Group Element – General
ABC26IN0460 · Among the following donors, the one that forms most stable adduct with the Lewis acid B(CH3)3 is: · Main Group Element – General