Main Group Elements

ABC26IN1262 · Two tautomeric forms of phosphorus acid are · DEC 2013

ABC26IN0188 · The solid state structure of aluminum fluoride is · 2013

ABC26IN1263 · The solid state structure of aluminum fluoride is · DEC 2013

ABC26IN1264 · The orbital interactions shown below represent · DEC 2013

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

ABC26IN0192 · Reactions of elemental as with hot and conc. HNO3, and H2SO4 respectively, give · 2014

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

ABC26IN1277 · 12-Crown-4 binds with the alkali metal ions in the following order : Li+ Na+>K+>Cs+. It is due to the · DEC 2014

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

ABC26IN0195 · All forms of phosphorus upon melting, exist as · 2014

ABC26IN1279 · All forms of phosphorus upon melting, exist as · JUNE 2015

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

ABC26IN1285 · Consider the following reaction : N3P3Cl6 + 6HNMe2 → N3P3Cl3(NMe2)3 + 3 Me2NH.HCl [A] The number of possible isomers for [A] is · DEC 2015

ABC26IN1286 · The reaction of BCl3, with NH4Cl gives product A which upon reduction by NaBH4 gives product B. Product B upon reacting with HCl affords… · DEC 2015

ABC26IN1287 · Protonated form of ZSM-5 catalyzes the reaction of ethene with benzene to produce ethylbenzene. The correct statement for this catalytic… · DEC 2015

ABC26IN1288 · The numbers of P-S and P-P bonds in the compound P4 S3 are, respectively · JUNE 2016

ABC26IN0201 · The metal iodide with metallic lustre and high electrical conductivity is · 2016

ABC26IN1290 · The metal iodide with metallic lustre and high electrical conductivity is · DEC 2016

ABC26IN1291 · Consider the following statements for KC8 : (A) It is paramagnetic (B) It has eclipsed layer structure (C) Its electrical conductivity is… · DEC 2016 self-practice

ABC26IN1292 · Among the following, choose the correct products that are formed in the reaction of S2 Cl2 with ammonia in CCl4 NH4 Cl(A), S4 N4(B), S8(C)… · DEC 2016

ABC26IN1293 · The final product(s) of the reaction of arachno borane, B4 H10 with NMe3 is/are · DEC 2016

ABC26IN1296 · The compound N2 F2 has two isomers. Choose the correct option from the following: · JUNE 2017

ABC26IN1297 · The first ionization energy is the lowest for · DEC 2017

ABC26IN1298 · Choose the incorrect statement for the phosphomolybdate anion [PMo12O40]3- · DEC 2017

ABC26IN0202 · The structure of CaB6 is close to that of · 2018 self-practice

ABC26IN1299 · The structure of CaB6 is close to that of · JUNE 2018

ABC26IN0203 · Among the elements Zn, Ga, Ge as As, the one with the lowest first ionization energy is - · 2018

ABC26IN1300 · Among the elements Zn, Ga, Ge as As, the one with the lowest first ionization energy is - · JUNE 2018

ABC26IN0205 · Consider following statements: I: AsCl5 is thermally less stable than PCl5. II: Size of As is more than that of P. choose correct answer… · 2018 self-practice

ABC26IN1303 · Consider the following statements for Be2Cl4 (I), B2Cl4 (II) and Ga2Cl4 (III): (A) There is an M-M (M = Be, B, Ga) bond in all. (B) The… · JUNE 2018

ABC26IN0206 · The reaction of decaborane B10H14, with acetylene in the presence of Et2S gives · 2018

ABC26IN1304 · The reaction of decaborane B10 H14, with acetylene in the presence of Et2 S gives · DEC 2018

ABC26IN1305 · In compound N3 P3 F6, the geometry around nitrogen and phosphorus, respectively, are · DEC 2018

ABC26IN0207 · Match the items given in Column-I with those given in Column-II The correct match is · 2018

ABC26IN1309 · The species that results by replacing one quarter of Si(IV) in pyrophyllite [Al2(OH)2 Si4 O10] with Al(III) [charge balance by K(1)] is · JUNE 2019

ABC26IN1310 · The oxidation state of sulphur in the dithionous and dithionic acids, respectively, are · JUNE 2019

ABC26IN1311 · In the synthesis of polydimethylsiloxane, the chain forming, branching and terminating agents respectively, are · JUNE 2019

ABC26IN0208 · The correct statements regarding Boron among the following (1) Nuclear spin of 11B is greater than that of 10B (II) The polarities of B-H… · 2019