WHICH ONE OF THE FOLLOWING ALKYL HALIDES GIVES THE HIGHEST RATIO OF SUBSTITUTION TO ELIMINATION ON TREATMENT WITH SODUM ETHOXIDE IN ETHANOL

Question

1-BROMOPENTANE
2-BROMOPENTANE
3-BROMOPENTANE
1-BROMO-2-METHYLBUTANE
2-BROMO-2-METHYLBUTANE

Answer 1

Elimination reactions are favored in 3^o > 2^o > 1^o so it seems to me, the way the question is worded, that the answer is the primary halide. Check my thinking.