Electron gain enthalpy

25 questions on Electron gain enthalpy from the Periodic Table and Periodicity chapter: 5 NEET level, 10 JEE Main, 10 JEE Advanced. Each one opens with its answer and solution.

• In the convention used for electron gain enthalpy, a negative value means that energy is released when the gaseous atom accepts an electron. Among the halogens,... NEET level
• Noble gases have positive electron gain enthalpies because NEET level
• The electron gain enthalpy of Cl(g) is -349 kJ mol^-1. The energy that must be supplied to remove one mole of electrons from Cl-(g) is therefore NEET level
• Which of the following elements has a positive first electron gain enthalpy? NEET level
• The second electron gain enthalpy of oxygen, for O-(g) + e^- -> O^2-(g), is positive because NEET level
• Using the values F -328, Cl -349, Br -325, I -295 (in kJ mol^-1), the order of decreasing magnitude of energy released on electron gain is JEE Main level
• The electron gain enthalpy of fluorine is less negative than that of chlorine mainly because JEE Main level
• For oxygen, the first electron gain enthalpy is -141 kJ mol^-1 and the second is +744 kJ mol^-1. The enthalpy change for O(g) + 2e^- -> O^2-(g) is JEE Main level
• Match the species in List I with the correct description in List II. List I: (P) Cl first electron gain; (Q) Ne first electron gain; (R) Be first electron gain;... JEE Main level
• The electron gain enthalpy of F(g) is -328 kJ mol^-1. The enthalpy change for 2 F-(g) -> 2 F(g) + 2e^- (2 mol) is JEE Main level
• Nitrogen has a much less negative (nearly zero) electron gain enthalpy than carbon mainly because JEE Main level
• Chlorine has a much more negative electron gain enthalpy than sulfur (-349 against -200 kJ mol^-1) chiefly because JEE Main level
• Among Li, Be, B and C, the element whose first electron gain enthalpy is positive is JEE Main level
• Which of the following elements have a positive first electron gain enthalpy? JEE Main level
• Select the correct statements about electron gain enthalpy. JEE Main level
• Use Delta_iH_1(Na) = 496 kJ mol^-1 and the electron gain enthalpy of Cl (-349 kJ mol^-1). The enthalpy change for Na(g) + Cl(g) -> Na+(g) + Cl-(g) is JEE Advanced level
• Use Delta_iH_1(Mg) = 738, Delta_iH_2(Mg) = 1451 and Delta_egH(Cl) = -349 kJ mol^-1. The enthalpy change for Mg(g) + 2 Cl(g) -> Mg^2+(g) + 2 Cl-(g) is JEE Advanced level
• Use Delta_iH_1 = 738 and Delta_iH_2 = 1451 for Mg, and electron gain enthalpies -141 (first) and +744 (second) for O, all in kJ mol^-1. The enthalpy change for ... JEE Advanced level
• Down group 17 the electron gain enthalpy generally becomes less negative (Cl -349, Br -325, I -295), yet F (-328) is less negative than Cl. Which statement corr... JEE Advanced level
• Electron gain enthalpy of Cl is -349 kJ mol^-1. Take 1 eV per atom = 96.5 kJ mol^-1 and hc = 1240 eV nm. The longest wavelength of light that can detach an elec... JEE Advanced level
• Sulfur has first and second electron gain enthalpies of -200 and +640 kJ mol^-1 respectively. For the process S(g) + 2e^- -> S^2-(g) with 3.2 g of S atoms (S = ... JEE Advanced level
• Element A has Delta_iH_1 = 496 and Delta_iH_2 = 4562 kJ mol^-1. Element Z (period 3) has a first electron gain enthalpy of -200 kJ mol^-1 and a very positive se... JEE Advanced level
• Using the data: O -141, S -200, F -328, Cl -349 kJ mol^-1 (first electron gain enthalpies), select the correct statements. JEE Advanced level
• Select the correct statements about electron gain enthalpy. JEE Advanced level
• Let EA be the electron affinity (energy released on forming X- from X, ignoring the small RT correction). Given that the electron gain enthalpies are F -328, Cl... JEE Advanced level