Chemistry - CHEMICAL BONDING Question with Solution | TestHub
List - I | List - II |
|---|---|
(A) Molecules obeying octet rule | (i) NO, NO₂ |
(B) Molecules with incomplete octet | (ii) BF₃, BeCl₂ |
(C) Molecules having odd number of electrons | (iii) SF₄, XeF₄ |
(D) Molecules with expanded octet | (iv) CH₄, CO₂ |
Options:
Answer:
Solution:
A-iv: CH₄ and CO₂ obey the octet rule, as both carbon atoms are surrounded by exactly 8 valence electrons.
B-ii: BF₃ (6 electrons) and BeCl₂ (4 electrons) have incomplete octets because they have fewer than 8 electrons around the central atom.
C-i: NO (11 valence electrons) and NO₂ (17 valence electrons) are odd-electron molecules because their total electron counts are not even.
D-iii: SF₄ (10 electrons) and XeF₄ (12 electrons) have expanded octets by utilizing d-orbitals to hold more than 8 electrons.
Final Match: This gives the sequence A-iv, B-ii, C-i, D-iii, which matches Option (A).