Main Group Elements

ABC26IN0708 · Number of three-centre two-electron (3e-2e) bonds present in diborane is: · 2005-2022

ABC26IN1241 · Bayer's process involves. · DEC 2011

ABC26IN0709 · Which one of the following order of the carbonates is Correct for their decomposition temperature? · 2005-2022

ABC26IN0710 · The species responsible for the superacidity of SbF5-HSO3 F system is · 2005-2022

ABC26IN0711 · The final products in the reaction of BF3 with water are · 2005-2022

ABC26IN1242 · Among the halides, NCl3(A), PCl3(B) and AsCl3(C), those which produce two different acids. · JUNE 2012

ABC26IN1243 · The most used acid catalyst in oil industry and the relevant process are respectively · JUNE 2012

ABC26IN0714 · The number of S-S bond(s) in tetrathionate ion is · 2005-2022

ABC26IN1245 · Low oxidation state complexes are often air-sensitive, but are rarely water sensitive because · JUNE 2012 self-practice

ABC26IN0715 · The number of isomeric structures of di-substituted borazine (B3 N3 H4 X2) is ____ · 2005-2022

ABC26IN1246 · For the deposition of Pb by electroplating, the best suited compound among the following is · DEC 2012

ABC26IN0716 · The CORRECT order of melting points of group 15 trifluorides is · 2005-2022

ABC26IN1247 · The electronegativity differences is the highest for the pair · DEC 2012

ABC26IN0181 · Structure of a carborane with formula, C2B4H8, is formally derived from · 2012

ABC26IN0717 · On hydrolysis, aluminium carbide produces · 2005-2022

ABC26IN1248 · Structure of a carborane with formula, C2 B4 H8, is formally derived from · DEC 2012

ABC26IN0182 · Boric acid is a weak acid in aqueous solution. But its acidity increases significantly in the presence of ethylene glycol, because · 2012

ABC26IN1249 · Boric acid is a weak acid in aqueous solution. But its acidity increases significantly in the presence of ethylene glycol, because · DEC 2012

ABC26IN0719 · Among the following, the correct statement is · 2005-2022

ABC26IN1251 · Which of the following pairs has the highest difference in their first ionization energy? · JUNE 2013

ABC26IN0721 · Treatment of formic acid with concentrated sulfuric acid gives · 2005-2022

ABC26IN1252 · Which of the following is used as propellant for whipping creams? · JUNE 2013

ABC26IN1253 · Flame proof fabrices contain · JUNE 2013

ABC26IN0723 · The coordination number of aluminium ion and the number of bridging hydrogen atoms in [Al (BH4)4]- are respectively, · 2005-2022

ABC26IN1254 · Among the oxides of nitrogen, N2 O3, N2 O4, and N2 O5 the compound(s) having N-N bond is/are · JUNE 2013

ABC26IN1255 · Identify the pairs in which the covalent radii of elements are almost similar (A) Nb, Ta (B) Mo, W (C) La, Lu (D) Sc, Y · JUNE 2013

ABC26IN1256 · The correct equilibrium order for the interconversion of different forms of SiO2 is · JUNE 2013

ABC26IN0184 · The reaction of FeCl3 · 6H2O with SOCl2 yields. · 2013

ABC26IN1257 · The reaction of FeCl3 · 6 H2 O with SOCl2 yields. · DEC 2013

ABC26IN1258 · Among the molten alkali metals, the example of an immiscible pair (in all proportions)is · DEC 2013

ABC26IN0728 · The major product formed in the following reaction K+O2 → is · 2005-2022

ABC26IN0729 · Among the following, the compound that forms the strongest hydrogen bond is · 2005-2022

ABC26IN1260 · The reason for the chemical inertness of gaseous nitrogen at room temperature is best given · DEC 2013

ABC26IN0730 · The stability of adducts H3 B · PF3, H3 B · NMe3, H3 B · CO, H3 B · OMe2 follows the order · 2005-2022

ABC26IN1265 · In a specific reaction, hexachlorocyclotriphosphazene, N3P3Cl6 was reacted with a metal fluoride to obtain mixed halo derivatives namely… · DEC 2013

ABC26IN0191 · Number of isomeric derivatives possible for the neutral closo-carborane, C2B10H12 is · 2013

ABC26IN1267 · Number of isomeric derivatives possible for the neutral closo-carborane, C2 B10 H12 is · DEC 2013

ABC26IN1269 · Reactions of elemental as with hot and conc. HNO3, and H2 SO4 respectively, give · JUNE 2014

ABC26IN0193 · Chromite ore on fusion with sodium carbonate gives · 2014

ABC26IN1270 · Chromite ore on fusion with sodium carbonate gives · JUNE 2014

ABC26IN1271 · The correct order of decreasing electronegativity of the following atoms is, · JUNE 2014

ABC26IN1272 · The correct order of the size of S, S2-, S2+ and S4+ species is, · JUNE 2014

ABC26IN1273 · The reaction between SbF5 and two equivalents of HF leads to the formation of · DEC 2014

ABC26IN1274 · Among F-, Na+, O2- and Mg2+ ions, those having the highest and the lowest ionic radii respectively are · DEC 2014

ABC26IN1276 · A borane (X) is reacted with ammonia to give a salt of borohydride (Y). The 11B NMR spectrum of Y consists of a triplet and a quintet. The… · DEC 2014

ABC26IN1278 · The main products of the reaction of equimolar quantities of XeF6 with NaNO3 are · DEC 2014

ABC26IN0196 · The correct set of pseudo halide anions is · 2014

ABC26IN1280 · The correct set of pseudo halide anions is · JUNE 2015

ABC26IN1281 · The oxoacid of phosphorus having P atoms in +4,+3, and +4 oxidation states respectively, is · JUNE 2015

ABC26IN0199 · Consider the following reaction : N3P3Cl6 + 6HNMe2 → [A]N3P3Cl3(NMe2)3 + 3 Me2NH · HCl The number of possible isomers for [A] is · 2015