AIPMT MAIN2008Chemistry-Chemical Bonding
AIPMT MAIN 2008 Chemistry Molecular Orbital Theory MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Four diatomic species are listed below the different sequences. Which of these presents the correct order of their increasing bond order?
A
He₂⁺ < O₂⁻ < NO < C₂²⁻
B
O₂⁻ < NO < C₂²⁻ < He₂⁺
C
NO < C₂²⁻ < O₂⁻ < He₂⁺
D
C₂²⁻ < He₂⁺ < NO < O₂⁻
Correct Answer
Option A
Detailed Explanation
Bond order is calculated as (number of bonding electrons - number of antibonding electrons)/2. The correct order based on bond order calculations is NO < C₂²⁻ < O₂⁻ < He₂⁺.
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