Question

Given below are two statements

Statement 1: $2-\mathrm{methyl}\mathrm{butane}$ on oxidation with ${\mathrm{KMnO}}_4$ gives $2-\mathrm{methyl}\mathrm{butane}-2-\mathrm{ol}$.

Statement 2:$\mathrm{n}-\mathrm{alkanes}$can be easily oxidized to corresponding alcohols with ${\mathrm{KMnO}}_4$.

• A. Both statement 1 and statement 2 are incorrect
• B. Statement 1 is correct but statement 2 is incorrect
• C. Both statement 1 and statement 2 are correct
• D. Statement 1 is incorrect but statement 2 is correct

Answer 1

The correct option is B

Statement 1 is correct but statement 2 is incorrect

Answer (B)

Explanation for correct option:

Alkane are very less reactive as they are very stable. Oxidizing agents like ${\mathrm{KMnO}}_4$ usually have no effect on alkanes. But, alkanes which have a tertiary hydrogen can get oxidized to form alcohol when reacted with ${\mathrm{KMnO}}_4$.

$2-\mathrm{methyl}-\mathrm{butane}$

Explanation for incorrect option:

$\mathrm{n}-\mathrm{alkanes}\stackrel{{\mathrm{KMnO}}_4}{\to }$No reaction

n-alkanes have sigma bonds and no pi bonds. Due to this fact, they are very stable in nature and do not react with ${\mathrm{KMnO}}_4$ and therefore no oxidation takes place.

Hence (B) is correct option.