Which of the following electronegativity order is incorrect?
- S<Cl<O<F
- Al<Si<C<N
- Al<Mg<B<N
- Mg<Be<B<N
Answer
(3) Al<Mg<B<N
Solution
Mg (1.31) < Al (1.61), so "Al<Mg" is wrong.
Al<Mg<B<N is incorrect (correct: Mg<Al<B<N); the other orders rise correctly.
Answer: (3)