Indian Navy INET Hydrocarbons — practice questions

Explore 2 free Hydrocarbons questions in Indian Navy INET Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Hydrocarbons questions and exercises with answers

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As per your syllabus, the general formula of an alkane (saturated open-chain hydrocarbon) is which?Read the answer and worked solution →As per your syllabus, Friedel-Crafts ALKYLATION of benzene uses which reagent system?Read the answer and worked solution →

Worked practice questions

As per your syllabus, the general formula of an alkane (saturated open-chain hydrocarbon) is which?

CₙHₙ
CₙH₂ₙ₊₂
CₙH₂ₙ₋₂
CₙH₂ₙ

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Correct answer: B. CₙH₂ₙ₊₂

Your syllabus: alkanes follow CₙH₂ₙ₊₂. Alkenes are CₙH₂ₙ; alkynes CₙH₂ₙ₋₂.

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As per your syllabus, Friedel-Crafts ALKYLATION of benzene uses which reagent system?

R-Cl with anhydrous AlCl₃
R-Cl with Na in dry ether
ROH with conc. H₂SO₄
R-COOH with NaOH/CaO

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Correct answer: A. R-Cl with anhydrous AlCl₃

Your syllabus: alkyl halide + anhydrous AlCl₃ generates R⁺, which attacks benzene to form alkylbenzene.