Main Group Elements

ABC26IN0179 · Lewis acidity of BCl3, BPh3 and BMe3 with respect to pyridine follows the order · 2011

ABC26IN0701 · The compound having an S-S single bond is · 2005-2022

ABC26IN1234 · Lewis acidity of BCl3, BPh3 and BMe3 with respect to pyridine follows the order · DEC 2011

ABC26IN1235 · Among the following pairs (1) oxygen-sulfur (2) nitrogen-phosphorus (3) phosphorus arsenic (4) chlorine-iodine Those in which the first… · DEC 2011

ABC26IN0703 · The number of P=O bonds present in the tetrabasic acid H4 P2 O7 is: · 2005-2022

ABC26IN1236 · The reaction between NH4 Br and Na metal in liquid ammonia (solvent) results in the products · DEC 2011

ABC26IN0704 · Calgon used for water softening is Na2 [Na4 (PO3)6] and it is prepared by heating microcosmic salt. The microcosmic salt is: · 2005-2022

ABC26IN0705 · In the structure of B4 O5(OH)42- · 2005-2022

ABC26IN1238 · The final product (s) of the reaction P(OR)3+R′ X is/are · DEC 2011

ABC26IN1240 · The styx code of B4 H10 is: · DEC 2011

ABC26IN0180 · Bayer's process involves. · 2011

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

ABC26IN1244 · The correct structure of P4S3 is: · 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

ABC26IN0720 · In the structure of P4 O10, the number of P-O-P bond(s) 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

ABC26IN0722 · One of the products of the hydrolysis of calcium phosphide at 25°C is · 2005-2022

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

ABC26IN0724 · The solid state structure of HF is · 2005-2022

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

ABC26IN0185 · Among the molten alkali metals, the example of an immiscible pair (in all proportions)is · 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