AP EAMCET202120 Aug 2021Evening ShiftChemistryd and f Block ElementsActual
Match the following? property metal (a) Element with highest second ionization enthalpy Δ i H 2 ( i ) Co (b) Element with highest third ionization enthalpy Δ i H 3 ( ii ) Cr (c) M in M ( CO ) 6 ( iii ) Cu (d) Element with highest heat of atomization Δ a H ( iv ) Zn ( v ) Ni
Options
- A( a →  iii  ),( b → i ),( c → v ),( d → iv )
- B( a → iii ) , ( b → iv ) , ( c → ii ) , ( d → v )
- C( a → iv ) , ( b → i ) , ( c → ii ) , ( d → iii )
- D( a → v ) , ( b → iv ) , ( c → i ) , ( d → iii )
Correct answer
B. ( a → iii ) , ( b → iv ) , ( c → ii ) , ( d → v )
Step-by-step solution
The atomic number of copper is 29 . It has the electronic configuration of 3 d 10 4 s 1 . After the first ionisation energy it has the electronic configuration of 3 d 10 4 s 0 . After that it has the very high second ionisation energy because of fully filled d - orbital. Zinc has the atomic number of the 30 . It has the electronic configuration of 3 d 10 4 s 2 . After that the second ionisation energy it has the electronic configuration of 3 d 10 4 s 0 . After that it has the very high third ionisation energy becau