99 Percentile Qs Bank for JEE MainChemistryClassification of Elements and Periodicity in Properties
Column I Column II A. He i . Highest electron gain enthalpy B. Cl ii . Most electropositive element C. Ca iii . Strongest reducing agent D. Li iv . Highest ionisation energy The correct match of the contents in column I with those in column II is
Options
- AA-( iii ), B-( i ), C-( ii ), D-( iv )
- BA-( iv ), B-( iii ), C-( ii ), D-( i )
- CA-( i ), B-( ii ), C-( iii ), D-( iv )
- DA-( iv ), B-( i ), C-( ii ), D-( iii )
Correct answer
D. A-( iv ), B-( i ), C-( ii ), D-( iii )
Step-by-step solution
He ⇒ Inert gas Cl ⇒ Electron gain enthalpy is highest Ca ⇒ Most electropositive metal Li ⇒ Strong reducing agent He has the electronic configuration of 1 s 2 . It is completely filled electronic configuration, due to this, it has the highest ionisation enthalpy. Cl ⟶ Cl - gives the highest Δ eg H as Cl – after getting one electron, it will achieve the stable electronic configuration 18 Ar . Due to this, large amount of energy is released during this process. 2 0 Ca ⟶