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Hydrocarbons question

2024 · Q145
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Hydrocarbons question

2024 · Q145

NEETChemistryHydrocarbonsMCQ+4 / −1

The alkane that can be oxidized to the corresponding alcohol by KMnO4_44​ as per the equation

NEET 2024 (Re-Examination) Chemistry - Hydrocarbons Question 4 English

is, when :

  1. A
    R1=H;R2=H;R3=H\mathrm{R}_1=\mathrm{H} ; \mathrm{R}_2=\mathrm{H} ; \mathrm{R}_3=\mathrm{H}R1​=H;R2​=H;R3​=H
  2. B
    R1=CH3;R2=CH3;R3=CH3\mathrm{R}_1=\mathrm{CH}_3 ; \mathrm{R}_2=\mathrm{CH}_3 ; \mathrm{R}_3=\mathrm{CH}_3R1​=CH3​;R2​=CH3​;R3​=CH3​
  3. C
    R1=CH3;R2=H;R3=H\mathrm{R}_1=\mathrm{CH}_3 ; \mathrm{R}_2=\mathrm{H} ; \mathrm{R}_3=\mathrm{H}R1​=CH3​;R2​=H;R3​=H
  4. D
    R1=CH3;R2=CH3;R3=H\mathrm{R}_1=\mathrm{CH}_3 ; \mathrm{R}_2=\mathrm{CH}_3 ; \mathrm{R}_3=\mathrm{H}R1​=CH3​;R2​=CH3​;R3​=H
View written solutionFree

Correct answer: B

Generally alkanes resist oxidation but alkane with tertiary H atom(s) can be oxidised to corresponding alcohols by KMnO$_4$

NEET 2024 (Re-Examination) Chemistry - Hydrocarbons Question 4 English Explanation

$$ \therefore \mathrm{R}_1 \Rightarrow \mathrm{CH}_3 \quad \mathrm{R}_2 \Rightarrow \mathrm{CH}_3 \quad \mathrm{R}_3 \Rightarrow \mathrm{CH}_3$$

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