AP EAMCET · Chemistry · d and f Block Elements

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 $(Δ_{a} H)$ $(iv) Zn$

$(v) Ni$

A $(a \to iii),(b \to i),(c \to v),(d \to iv)$
B $(a \to iii), (b \to iv), (c \to ii), (d \to v)$
C $(a \to iv), (b \to i), (c \to ii), (d \to iii)$
D $(a \to v), (b \to iv), (c \to i), (d \to iii)$

Verified Solution

Answer & Solution

Correct Answer

(B) $(a \to iii), (b \to iv), (c \to ii), (d \to v)$

Step-by-step Solution

Detailed explanation

The atomic number of copper is 29. It has the electronic configuration of 3d104s1. After the first ionisation energy it has the electronic configuration of 3d104s0. After that it has the very high second ionisation energy because of fully filled d-orbital. Zinc has the atomic…

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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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 $(Δ_{a} H)$	$(iv) Zn$
	$(v) Ni$

Match the following? property metal (a) Element with highest second ionization enthalpy ΔiH2 (i) Co (b) Element with highest third ionization enthalpy ΔiH3 (ii) Cr (c) M in M(CO)6 (iii) Cu (d) Element with highest heat of atomization ΔaH (iv) Zn (v) Ni

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