ABC26IN0478 · The correct order of Lewis acid strengths of BF2 Cl, BFClFBr, BF2 Br and BFBr2 is: · 2005-2021
ABC26IN0479 · Reaction of LiAlH4 with one equivalent of Me3 N HCl gives a tetrahedral compound, which reacts with another equivalent of Me3 N HCl to give… · 2005-2021
Main Group Elements – General
ABC26IN0177 · The correct order of stability of difluorides is: · 2011
ABC26IN0696 · Arrange BF3, BCl3 and BBr3 in the increasing order of Lewis acidity and justify. 2(a) Write the steps involved in the production of pure… · 2005-2022self-practice
ABC26IN1229 · The correct order of stability of difluorides is: · JUNE 2011
ABC26IN1230 · Alkali metal superoxides are obtained by the reaction of · JUNE 2011
ABC26IN0698 · Which of the following reactions does not give H3 PO4 ? · 2005-2022
ABC26IN0700 · 5(a) Al2 Cl6 and Al2 Me6 are dimeric in gas phase. Draw their structures. Which compound has more Lewis acid character? Explain. · 2005-2022self-practice
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 arrayll (1)\ oxygen-sulfur & (2)\ nitrogen-phosphorus \\ (3)\ phosphorus arsenic & (4)\ chlorine-iodine array… · 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
ABC26IN0707 · 12(a) In the following reactions, identify X, Y and Z. arrayl Na2 SO3+S boiling water X (colorless complex) \\ AgBr excess X Y (soluble… · 2005-2022
ABC26IN1240 · The styx code of B4 H10 is: · DEC 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
ABC26IN0712 · The number of P-H bonds in hypophosphorus acid is ____. · 2005-2022self-practice
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 2012self-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
ABC26IN0183 · Flame proof fabrices contain · 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