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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 (9-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.

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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. 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.

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

  8. In an industrial process, a mixture of products is obtained when a hydrocarbon undergoes halogenation. Which method can be used to separate the monosubstituted product?

  9. What is the general formula for alkanes with 'n' carbon atoms?

  10. Which method would be most appropriate to distinguish between saturated and unsaturated carbon compounds in a laboratory setting?


Important Questions from Hydrocarbons

  1. Which structural feature contributes to the high reactivity of unsaturated organic compounds?
  2. Unsaturated hydrocarbons usually produce:
  3. Which property of carbon allows it to form a large number of compounds by bonding with itself and other elements?
  4. Which type of bond is present between carbon atoms in saturated hydrocarbons?
  5. Power Alcohol is a mixture of ______ and ethyl alcohol.
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