Question

Match List-I with List-II :  

List - IMolecule	List - IIBond enthalpy (kJ mol-1)
(A) HCl	(I) 435.8
(B) N2	(II) 498
(C) H2	(III) 946.0
(D) O2	(IV) 431.0

Identify the correct answer from the options given below :

• A. A-III, B-IV, C-I, D-II
• B. A-IV, B-I, C-III, D-II
• C. A-IV, B-III, C-II, D-I
• D. A-IV, B-III, C-I, D-II

Answer 1

The Correct Option is D

To solve this question, we need to match the molecules in List-I with the corresponding bond enthalpies in List-II. This involves knowing the bond enthalpies commonly associated with these molecules. Let's match them one by one: 

1. HCl (Hydrochloric Acid): The typical bond enthalpy for HCl is approximately 431.0 kJ/mol. Therefore, HCl matches with Option (IV).
2. N₂ (Nitrogen Gas): Nitrogen molecules have a very strong triple bond, leading to a high bond enthalpy of approximately 946.0 kJ/mol. Therefore, N₂ matches with Option (III).
3. H₂ (Hydrogen Gas): The bond enthalpy for H₂ is typically around 435.8 kJ/mol. Thus, H₂ matches with Option (I).
4. O₂ (Oxygen Gas): Oxygen molecules have a double bond with a bond enthalpy of approximately 498 kJ/mol. Hence, O₂ matches with Option (II).

So, the correct matching of List-I with List-II is:

• (A) HCl matches with (IV) 431.0 kJ/mol
• (B) N₂ matches with (III) 946.0 kJ/mol
• (C) H₂ matches with (I) 435.8 kJ/mol
• (D) O₂ matches with (II) 498 kJ/mol

Thus, the correct option is: A-IV, B-III, C-I, D-II.