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ECAT (Engineering College Admission) Chemistry: Most Repeated MCQs with Answers

Practise ECAT (Engineering College Admission) Chemistry most repeated MCQs in sets of about 20 questions with instant answers and explanations. This page focuses on high-yield questions that appear most often in the real paper, helping you build accuracy and speed for the actual ECAT (Engineering College Admission) paper.

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Sample ECAT (Engineering College Admission) Chemistry most repeated questions

  1. Q1. What is the compressibility factor for an ideal gas?

    • A) 1
    • B) 0
    • C) 2
    • D) -1

    Answer: 1

  2. Q2. The energy of an electron in the 2nd orbit of He+ is

    • A) -13.6 eV
    • B) -6.8 eV
    • C) -27.2 eV
    • D) -54.4 eV

    Answer: -27.2 eV

  3. Q3. The rate constant for a reaction is 0.01 M-1s-1. The order of the reaction is

    • A) 1
    • B) 2
    • C) 0
    • D) 3

    Answer: 2

  4. Q4. What is the hybridization of NH3?

    • A) sp2
    • B) sp3
    • C) sp
    • D) dsp2

    Answer: sp3

  5. Q5. The reaction of alcohols with SOCl2 gives

    • A) Alkyl halides
    • B) Alkenes
    • C) Alkynes
    • D) Alkanes

    Answer: Alkyl halides

Frequently asked questions

What are most repeated Chemistry MCQs for ECAT (Engineering College Admission)?

Most Repeated Chemistry MCQs are high-yield questions that appear most often in the real paper. On Imtehan they are grouped into short sets so you can review one topic at a time before moving to timed mocks.

How many ECAT (Engineering College Admission) Chemistry most repeated questions can I practise?

Imtehan organises ECAT (Engineering College Admission) Chemistry questions into multiple sets. Start with the sample questions below, then open a set to practise interactively with scoring and explanations.

Is ECAT (Engineering College Admission) Chemistry most repeated practice free?

Yes — you can practise ECAT (Engineering College Admission) Chemistry MCQs for free on Imtehan. Premium unlocks detailed analytics and unlimited mock attempts.

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