JEE Main 202621 JanuaryEvening Shift
- Exam
- JEE Main
- Year
- 2026
- Date
- 21 January
- Shift
- Evening Shift
- Subject
- Chemistry
- Chapter
- Chemical Bonding and Molecular Structure
JEE Main 2026 · 21 January · Evening Shift · Chemistry · Chemical Bonding and Molecular Structure
Given below are two statements: Statement I : The correct order in...
Given below are two statements:
Statement I : The correct order in terms of bond dissociation enthalpy is \mathrm{I}.
Statement II: The correct trend in the covalent character of the metal halides is , \left[\mathrm{PbCl}_{4}>\mathrm{PbCl}_{2}\right].
In the light of the above statements, choose the correct answer from the options given below :
Statement I : The correct order in terms of bond dissociation enthalpy is \mathrm{I}.
Statement II: The correct trend in the covalent character of the metal halides is , \left[\mathrm{PbCl}_{4}>\mathrm{PbCl}_{2}\right].
In the light of the above statements, choose the correct answer from the options given below :
Options
- AStatement I is false but Statement II is true
- BBoth Statement I and Statement II are false
- CStatement I is true but Statement II is false
- DBoth Statement I and Statement II are true
Correct answer
C. Statement I is true but Statement II is false
Step-by-step solution
Statement I: The bond dissociation enthalpy of halogens follows the order . The bond energy of is lower than and due to the high inter-electronic repulsion between the lone pairs on the small fluorine atoms. Thus, Statement I is true.
Statement II: According to Fajan's rules, for a given metal, the compound with the metal in a higher oxidation state has more covalent character due to higher polarizing power. Therefore, and are correct. However, for Uranium halides, has a higher oxidation state (+6) than (+4), so is more covalent than . The statement claims , which is incorrect. Thus, Statement II is false.
Statement II: According to Fajan's rules, for a given metal, the compound with the metal in a higher oxidation state has more covalent character due to higher polarizing power. Therefore, and are correct. However, for Uranium halides, has a higher oxidation state (+6) than (+4), so is more covalent than . The statement claims , which is incorrect. Thus, Statement II is false.