JEE Main 2026 — Chemical Bonding and Molecular Structure Question with Solution
JEE Main 2026 (21 January Shift 2)
Question
Given below are two statements:
Statement I : The correct order in terms of bond dissociation enthalpy is .
Statement II: The correct trend in the covalent character of the metal halides is , and .
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 .
Statement II: The correct trend in the covalent character of the metal halides is , and .
In the light of the above statements, choose the correct answer from the options given below :
Choose an option
Show full solutionCorrect option: C
Correct answer
CStatement I is true but Statement II is false
Step-by-step explanation
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.
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This is a previous-year question from JEE Main 2026, covering the Chemical Bonding and Molecular Structure chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.