265 questions from a source that prints this span of years rather than the year of each question. Each opens with its answer and explanation.
ABC26IN0709 · Which one of the following order of the carbonates is Correct for their decomposition temperature? · Main Group Elements – General
ABC26IN0710 · The species responsible for the superacidity of SbF5-HSO3 F system is · Main Group Elements – General
ABC26IN0711 · The final products in the reaction of BF3 with water are · Main Group Elements – General
ABC26IN0714 · The number of S-S bond(s) in tetrathionate ion is · Main Group Elements – General
ABC26IN0715 · The number of isomeric structures of di-substituted borazine (B3 N3 H4 X2) is ____ · Main Group Elements – General
ABC26IN0716 · The CORRECT order of melting points of group 15 trifluorides is · Main Group Elements – General
ABC26IN0717 · On hydrolysis, aluminium carbide produces · Main Group Elements – General
ABC26IN0718 · Among the following compounds, the one having the lowest boiling point is · Phosphazenes Sn Compounds
ABC26IN0719 · Among the following, the correct statement is · Main Group Elements – General
ABC26IN0720 · In the structure of P4 O10, the number of P-O-P bond(s) is ____. · Main Group Elements – General
ABC26IN0721 · Treatment of formic acid with concentrated sulfuric acid gives · Main Group Elements – General
ABC26IN0722 · One of the products of the hydrolysis of calcium phosphide at 25°C is · Main Group Elements – General
ABC26IN0723 · The coordination number of aluminium ion and the number of bridging hydrogen atoms in [Al (BH4)4]- are respectively, · Main Group Elements – General
ABC26IN0724 · The solid state structure of HF is · Main Group Elements – General
ABC26IN0726 · The value of 'n' in [Pn O18]6- is ____ · Noble Gas Chemistry
ABC26IN0727 · Reaction of BCl3 with NH4 Cl at 140° C produces compound P. further, P reacts with NaBH4 to give a colorless liquid Q. The reaction of Q… · Noble Gas Chemistry
ABC26IN0728 · The major product formed in the following reaction K+O2 → is · Main Group Elements – General
ABC26IN0729 · Among the following, the compound that forms the strongest hydrogen bond is · Main Group Elements – General
ABC26IN0730 · The stability of adducts H3 B · PF3, H3 B · NMe3, H3 B · CO, H3 B · OMe2 follows the order · Main Group Elements – General
ABC26IN0732 · The radioactive isotope used to locate brain tumors is · Radioactive Decay Kinetics
ABC26IN0734 · The half-life of a radioactive nuclide is 20 years. If a sample of this nuclide has an activity of 6400 disintegrations per minute… · Radioactive Decay Kinetics
ABC26IN0736 · In the process 92234 U → 90230 Th+X X is: · Nuclear Chemistry – General
ABC26IN0738 · In the following equation X is: 95241 Am+ alpha → 97243 Bk+X · Nuclear Chemistry – General
ABC26IN0739 · The total number of steps involved and number of beta particles emitted in the spontaneous decay of 92238 U → 82206 Pb respectively, are · Radioactive Decay Kinetics
ABC26IN0740 · In boron neutron capture therapy, the initial boron isotope used and the particle generated after neutron capture respectively are: · Isotope Applications
ABC26IN0741 · The number of alpha and beta particle(s), generated in the following radioactive decay process, are: 92238U → 92234U · Radioactive Decay Kinetics
ABC26IN0743 · The isotope 84214 Po undergoes one alpha and one beta particle emission sequentially to form an isotope " X ". The number of neutrons in "… · Isotope Applications
ABC26IN0745 · The decay modes of 14 C and 14 O are · Radioactive Decay Kinetics
ABC26IN0746 · 24 Na decays to one-fourth of its initial amount in 29.8 hours. Its decay constant is ____ hour -1 (rounded up to four decimal places). · Radioactive Decay Kinetics
ABC26IN0747 · A radioactive sample decays to 10% of its initial amount in 4600 minutes. The rate constant of this process is ____ hour -1 (Round off to… · Radioactive Decay Kinetics
ABC26IN0748 · For the following fusion reaction, 4 1 H → 4 He+2 beta ++2 nu + gamma the Q-value (energy of the reaction) in MeV (rounded off to one… · Fission Fusion
ABC26IN0749 · Metal-carbon multiple bonds in metal carbonyl are preferably identified from the stretching frequency of · Organometallics – General
ABC26IN0750 · B2 H6 and B4 H10, respectively, are examples of · Organometallics – General
ABC26IN0752 · The Correct order of CO vibrational stretching frequency in the following complexes is (I) (PF3)3 Mo(CO)3 (II) (PCl3)3 Mo(CO)3 (III)… · Organometallics – General
ABC26IN0753 · The carbonyl stretching frequency (vC=O) is highest for: · Organometallics – General
ABC26IN0755 · For the following reactions, the metal complexes X and Y are (i) Ni(s) [1 atm / 25° C]CO(g) X (ii) FeCl2 2 NaC5 H5 Y · Organometallics – General
ABC26IN0757 · The value of 'x' in [Cu(CO)x]+such that it obeys the 18 electron rule is · Organometallics – General
ABC26IN0758 · The correct order of vNO (cm-1) in the following compound is · Organometallics – General
ABC26IN0759 · The homogeneous catalyst used in water-gas shift reaction is · Organometallics – General
ABC26IN0760 · Among the following metal carbonyl species, the one with the highest metal-carbon back bonding is · Organometallics – General
ABC26IN0762 · The correct option having one complex from each of the following pairs which is more reactive towards the oxidative addition reaction by… · Organometallics – General
ABC26IN0763 · The value of n for the complex [Fe(CO)4 (SiMe3)]n satisfying the 18-electron rule is · Organometallics – General
ABC26IN0764 · Number of vertices in an icosahedral closo-borane is ____. · Organometallics – General
ABC26IN0765 · The order of the M-C bond strength in the following species is (Atomic number for Cr=24, Mn=25, Ti=22, Co=27) · Organometallics – General
ABC26IN0767 · The complex which does NOT obey 18 - electron rule is (atomic number for Mn=25, Fe=26, Co=27, Ru=44) · Organometallics – General
ABC26IN0769 · The CORRECT order of pKa for the compounds I to IV in water at 298 K is IHCo(CO)4 IIHCo(CO)3(PPh3) IIIHCo(CO)3(P(OPh)3) IVHCo(CO)2(PPh3)2 · Organometallics – General
ABC26IN0770 · The complex that does NOT obey the 18-electron rule is (Given: Atomic numbers of Ti, Mn, Ta and Ir are 22, 25, 73 and 77, respectively) · Organometallics – General
ABC26IN0771 · The decreasing order of C=C bond length in the following complexes is · Organometallics – General
ABC26IN0773 · The structure types of B10 H10 2- and B10 H14, respectively, are · Organometallics – General
ABC26IN0774 · The order of increasing CO stretching frequencies in [Co(CO)4]-, [Cu(CO)4]+, [Fe(CO)4]2- and [Ni(CO)4] is · Organometallics – General