Electronegativity and its applications

28 questions on Electronegativity and its applications from the Periodic Table and Periodicity chapter: 5 NEET level, 11 JEE Main, 12 JEE Advanced. Each one opens with its answer and solution.

• Which of the following arrangements shows the correct increasing order of Pauling electronegativity? JEE Main level
• Which of the following oxides are acidic in nature? JEE Main level
• Which element has the highest electronegativity on the Pauling scale? NEET level
• Using the Hannay-Smyth relation, percent ionic character = 16|Deltachi| + 3.5|Deltachi|^2, bond Q has |Deltachi| = 1.8 and bond P has |Deltachi| = 0.9. The rati... JEE Advanced level
• Element A has first ionisation energy 10.4 eV and electron affinity 3.6 eV; element B has 9.0 eV and 1.4 eV. Using Mulliken's definition chi_M = (IE + EA)/2 and... JEE Advanced level
• The acidic strength of the hypohalous acids follows the order JEE Main level
• Two hypothetical elements X and Y have bond dissociation energies E(X-X) = 150, E(Y-Y) = 240 and E(X-Y) = 300 kJ/mol. Use Pauling's relation |chi_X - chi_Y| = s... JEE Advanced level
• In which of the following compounds does hydrogen carry a negative oxidation state (using Pauling values H 2.20, Li 0.98, B 2.04, Si 1.90, C 2.55)? JEE Advanced level
• According to the Mulliken scale, electronegativity is proportional to the average of ionisation enthalpy and electron gain enthalpy (magnitude). Element X has I... JEE Main level
• Hypothetical elements A, B and C have Pauling electronegativities 0.9, 2.5 and 3.5 respectively. Using Pauling's relation, percent ionic character = 100 [1 - e^... JEE Advanced level
• The electronegativity of a carbon atom depends on its hybridisation. The correct order is JEE Main level
• Which of the following sets correctly describes the nature of CrO, Cr2O3 and CrO3 in that order? JEE Advanced level
• Which of the following statements about Pauling electronegativity is/are correct? (Values: F 3.98, Li 0.98, Be 1.57, Na 0.93, Mg 1.31, Cl 3.16, Br 2.96, I 2.66) JEE Main level
• Going from left to right across the third period (Na to Cl), the electronegativity generally NEET level
• Why does electronegativity (Allred-Rochow type reasoning, chi propto Z_eff/r^2) generally decrease down a group? JEE Main level
• Which pair correctly gives an amphoteric oxide and a neutral oxide, in that order? JEE Main level
• Which of the following oxides react with both dilute HCl and aqueous NaOH? JEE Advanced level
• Using Pauling values (Cl 3.16, I 2.66, P 2.19), the polarity of the bonds predicts the products of hydrolysis of ICl and PCl3 (water attacks the positive end, t... JEE Advanced level
• Consider the oxides Al2O3, SiO2, P4O10 and Cl2O7. The correct increasing order of acidic character is JEE Advanced level
• On the basis of the electronegativity difference alone, which compound has the highest ionic character in its bond? (Pauling values: Cs 0.79, Li 0.98, Na 0.93, ... JEE Main level
• Pauling's relation is chi_B - chi_A = sqrtDelta, where Delta = E(A-B) - sqrtE(A-A) E(B-B) is expressed in eV. The bond energies of a hypothetical pair are E(A-A... JEE Main level
• Which of the following oxides is the most acidic? NEET level
• For a given element, the electronegativity depends on its oxidation state in a compound. Which statement is correct? JEE Main level
• Allred-Rochow electronegativity is given by chi = 0.359 Z_eff/r^2 + 0.744 with r in angstrom. For an element with Z_eff = 5.45 and covalent radius 1.10 angstrom... JEE Advanced level
• For the three hypothetical bonds below, bond energies in kJ/mol are given as E(A-A), E(B-B), E(A-B): (i) P-Q: 160, 200, 320 (ii) R-S: 160, 260, 280 (iii) T-U: 2... JEE Advanced level
• Which of the following oxides is the most basic? NEET level
• Among the hydrogen halides, the most polar bond is present in NEET level
• Element M has IE = 5.2 eV and EA = 0.5 eV, while element X has IE = 12.0 eV and EA = 3.3 eV. Convert Mulliken electronegativities (IE + EA)/2 (eV) to the Paulin... JEE Advanced level