Question

Match the LIST-I with LIST-II: 

 

Choose the correct answer from the options given below :

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

Hint:

Remember that the octet rule applies to molecules where atoms aim to achieve 8 electrons in their outer shell. However, molecules with an odd number of electrons or those with more than 8 electrons on the central atom do not strictly follow this rule.

Answer 1

The Correct Option is A

(A) Molecules obeying octet rule: Molecules like CO2 and CCl4 obey the octet rule, where each atom completes its octet. Hence, A corresponds to IV. 
(B) Molecules with incomplete octet: Molecules such as BCl3 and AlCl3 have an incomplete octet on the central atom. Hence, B corresponds to II.
(C) Molecules with incomplete octet with odd electron: NO and NO2 have an odd number of electrons and an incomplete octet. Hence, C corresponds to I. 
(D) Molecules with expanded octet: Molecules like H2SO4 and PCl5 have an expanded octet, which means the central atoms have more than eight electrons. Hence, D corresponds to III. Thus, the correct matching is A-IV, B-II, C-I, D-III.