All Exams Test series for 1 year @ ₹349 only
Question

A compound has the molecular formula C4H10. Which statement best describes its structure?

This question was previously asked in
RRB Group D 2025 Question Paper (18-Aug-2026) (Shift 1)
The correct answer is

It can exist as two different isomers with straight or branched chains

C4H10 is butane, a saturated open-chain alkane satisfying the general formula CnH2n+2, so it contains only single C-C and C-H bonds and no ring.

Four carbon atoms can be joined in two distinct ways: a straight chain (n-butane, CH3-CH2-CH2-CH3) and a branched chain (isobutane, (CH3)3CH). These are the two structural isomers of butane.

Being saturated, it need not contain a C=C double bond, nor is it restricted to a single structure or a cyclic form.

Hence, the answer is It can exist as two different isomers with straight or branched chains.

Was this answer helpful?

Similar Questions

  1. What do methane, ethane and propane represent in the study of carbon compounds?

  2. Which property is most affected if the length of the carbon chain in an alkane increases?

  3. Which among the following molecular formulae of organic compounds does NOT represent a ring structure?

  4. Why do higher homologues of alkanes produce multiple products when they react with chlorine in a substitution reaction?

  5. Select the correct option regarding the following two statements labelled Assertion (A) and Reason (R).

    Assertion (A): Unsaturated hydrocarbons give a yellow flame with black smoke.

    Reason (R): They burn completely when oxygen is insufficient.

  6. Unsaturated hydrocarbons usually undergo which of the following reaction mechanisms?

  7. Which of the following statements about a homologous series are CORRECT?

    (1) All members have the same general formula.

    (2) Each successive member differs by a \(-CH_2-\) group.

    (3) Physical properties remain identical for all members.

  8. Which of the following hydrocarbons undergo addition reactions with hydrogen?

  9. Which of the following is NOT a characteristic of substitution reactions in alkanes?

  10. What sort of flame is produced when unsaturated carbon compounds are burnt in air?


Important Questions from Hydrocarbons

  1. Which of the following base is found in soap?

  2. Which one of the following is the general formula of Alkenes?

  3. \({\rm{C}}{{\rm{H}}_3}{\rm{COOH}}\mathop \to \limits^{LiAI{H_4}} {\rm{A}}\mathop \to \limits^{PC{I_5}} {\rm{B}}\mathop \to \limits^{alc.KOH} {\rm{C}}\) Homologue of ‘C’ in the above reaction is:
  4. Maximum quantity of carbon is present in

  5. Which of the following pair gives 1° carbonium ion by hydrolysis of C-Br bond?

Need Expert Advice?
Upcoming Exams
RRB JE
October 27, 2026
RRB ALP
November 03, 2026
Test Series
RRB Group D img
Railways
RRB Group D Mock Test Series 2026 (Latest Pattern)
1198 Tests 1 Tests Free
1854 Attempts
4.1(107)
English, Hindi

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App