AP EAMCET · Chemistry · Chemical Bonding and Molecular Structure

Arrange the following species in the correct order of their stabilities
\(\mathrm{N}_2^{-}, \mathrm{C}_2, \mathrm{Ne}_2, \mathrm{O}_2^{2-}\)

A \(\mathrm{Ne}_2 < \mathrm{O}_2^{2-} < \mathrm{C}_2 < \mathrm{N}_2^{-}\)
B \(\mathrm{Ne}_2 < \mathrm{C}_2 < \mathrm{O}_2^{2-} < \mathrm{N}_2^{-}\)
C \(\mathrm{Ne}_2 < \mathrm{N}_2^{-} < \mathrm{O}_2^{2-} < \mathrm{C}_2\)
D \(\mathrm{Ne}_2 < \mathrm{O}_2^{2-} < \mathrm{N}_2^{-} < \mathrm{C}_2\)

Verified Solution

Answer & Solution

Correct Answer

(A) \(\mathrm{Ne}_2 < \mathrm{O}_2^{2-} < \mathrm{C}_2 < \mathrm{N}_2^{-}\)

Step-by-step Solution

Detailed explanation

Higher the bond order, more is the stability. The bond order of the given species can be calculated as (i) \(\mathrm{N}_2^{-}=\)Diatomic molecule Number of electrons \(=(7+7+1)=15 e^{-}\) i.e. B.O. = 2.5 (ii) \(\mathrm{C}_2=\) Diatomic molecule Number of electrons…

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.

Same subject

Explore more questions on app

From AP EAMCET

Explore more questions on app

(A)	Isothermal process	(i)	$q = ∆ U$
(B)	Adiabatic process	(ii)	$W = - P \times ΔV$
(C)	Isobaric process	(iii)	$W = ∆ U$
(D)	Isochoric process	(iv)	$W = - nRTln (\frac{V_{f}}{V_{i}})$

Arrange the following species in the correct order of their stabilities\(\mathrm{N}_2^{-}, \mathrm{C}_2, \mathrm{Ne}_2, \mathrm{O}_2^{2-}\)

Step-by-step Solution

Arrange the following species in the correct order of their stabilities
\(\mathrm{N}_2^{-}, \mathrm{C}_2, \mathrm{Ne}_2, \mathrm{O}_2^{2-}\)