NEET | 2016Mole ConceptHard
Question
Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?
Options
A.
I2 > Br2 > Cl2 > F2
B.
Cl2 > Br2 > F2 > I2
C.
Br2 > I2 > F2 > Cl2
D.
F2 > Cl2 > Br2 > I2
Solution
Decreasing order of Bond energy, Cl2 > Br2 > F2 > I2
The reason is anomalous behavior due to large electron - electron repulsion among the lone pairs in F2 molecule other than Cl2 and Br2.
Create a free account to view solution
View Solution FreeMore Mole Concept Questions
When 12 g graphite is burnt in sufficient oxygen, CO as well as CO2 is formed. If the product contains 40% CO and 60% CO...A quantity of 0.22 g of a gas occupies a volume of 112 ml at pressure of 1 atm and temperature of 273 K. The gas may be...When the hydrocarbon propane is burned in air, carbon dioxide and water are formed. If 0.15 mol of CO2 is produced, then...Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 25oC are 200 mm Hg and 41.5 mm Hg respectively. Va...The vapour density of a sample of hydrogen fluoride gas is measured by an experiment as 20. It may represent that (F = 1...