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NEET-UG and JEE Main Chemistry · Class 11

Tetravalency of carbon and shapes of organic molecules — NEET & JEE Questions

Tetravalency of carbon and shapes of organic molecules is a topic in Some Basic Principles of Organic Chemistry, a Class 11 Chemistry chapter of the NEET-UG and JEE Main syllabus. TestBudy holds 12 published NEET-UG and JEE Main questions on Tetravalency of carbon and shapes of organic molecules, each with the marking scheme of the real paper.

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Tetravalency of carbon and shapes of organic molecules MCQs with solutions

10 of the 12 published questions on this topic, exactly as they appear in a test. Answers and worked solutions come with your result rather than on this page.

  1. Question 1 · difficulty L1 · recall

    The tetravalency of carbon means that a neutral carbon atom in ordinary organic compounds typically forms

    • A. one covalent bond
    • B. two covalent bonds
    • C. three covalent bonds
    • D. four covalent bonds

  2. Question 2 · difficulty L2 · understanding

    What is the approximate geometry around carbon in methane, CH4CH_4?

    • A. Linear
    • B. Trigonal planar
    • C. Tetrahedral
    • D. Square planar

  3. Question 3 · difficulty L2 · understanding

    A carbon atom involved in one double bond and two single bonds is typically

    • A. sp3 hybridised and tetrahedral
    • B. sp2 hybridised and trigonal planar
    • C. sp hybridised and linear
    • D. unhybridised and square planar

  4. Question 4 · difficulty L2 · understanding

    A carbon atom involved in a carbon-carbon triple bond is typically

    • A. sp3 hybridised
    • B. sp2 hybridised
    • C. sp hybridised
    • D. d2sp3 hybridised

  5. Question 5 · difficulty L3 · application

    What is the approximate bond angle around each carbon atom in ethene, C2H4C_2H_4?

    • A. 90∘90^\circ
    • B. 109.5∘109.5^\circ
    • C. 120∘120^\circ
    • D. 180∘180^\circ

  6. Question 6 · difficulty L3 · application

    What is the geometry around each carbon atom in ethyne, C2H2C_2H_2?

    • A. Tetrahedral
    • B. Trigonal planar
    • C. Linear
    • D. Bent

  7. Question 7 · difficulty L3 · application

    Which molecule contains a carbon atom with tetrahedral geometry?

    • A. Methane
    • B. Ethene
    • C. Ethyne
    • D. Carbon dioxide

  8. Question 8 · difficulty L3 · application

    A carbon atom forms four single bonds to four atoms. Which description is most appropriate?

    • A. sp hybridised and linear
    • B. sp2 hybridised and planar
    • C. sp3 hybridised and approximately tetrahedral
    • D. sp3 hybridised and square planar

  9. Question 9 · difficulty L4 · application

    Consider the carbon atoms in ethane, ethene and ethyne. Which sequence correctly gives their hybridisation?

    • A. sp3, sp2, sp
    • B. sp, sp2, sp3
    • C. sp2, sp3, sp
    • D. sp3, sp, sp2

  10. Question 10 · difficulty L4 · application

    Why is rotation around a carbon-carbon double bond much more restricted than around a carbon-carbon single bond?

    • A. A double bond contains a pi bond whose sideways orbital overlap would be disrupted by rotation
    • B. A single bond contains no electrons
    • C. A double bond is ionic
    • D. sp2 carbon has no sigma bonds

Common mistakes in Tetravalency of carbon and shapes of organic molecules

Recorded against questions in this topic that are not shown above, so none of these points at an answer you can see on this page.

  • Counts the pi component of the double bond as a separate direction and predicts four-coordinate tetrahedral geometry.
  • Counts total bond order rather than the number of sigma-bonding directions around each carbon.

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