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Alkynes

MHT-CET Chemistry. Try each one first, then open its answer.

Top 10 MHT-CET PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 3 times: 3 May 2023 S1, 26 Apr 2025 S1, 13 May 2026 S1. This one: 13 May 2026 S1 See all 3 of this type

    17
    Identify the product when but-2-yne is treated with H2\mathrm{H_2} gas in the presence of Lindlar's catalyst.

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  2. Question 2

    Asked 2 times: 3 May 2023 S1, 26 Apr 2025 S1 See all 2 times it was asked

    52
    Which of the following reagents is used to convert C≡CC \equiv C triple bond to C=CC = C double bond to give Cis isomer of alkene?

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  3. Question 3

    Asked 2 times: 15 May 2023 S2*, 13 May 2024 S2 (* = numbers or wording changed that year) See all 2 times it was asked

    84
    Identify 'B' in the following conversions: CH3Br→KCNA→Na/C2H5OHB\text{CH}_3\text{Br}\xrightarrow{\text{KCN}}\text{A}\xrightarrow{\text{Na/C}_2\text{H}_5\text{OH}}\text{B}

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  4. Question 4

    Asked once: 15 May 2026 S1

    15
    Which of the following hydrocarbons has most acidic H atom?

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  5. Question 5

    Asked once: 18 Apr 2026 S2

    17
    Which of the following is NOT terminal alkyne ?

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  6. Question 6

    Asked once: 18 Apr 2026 S1

    42
    Propyne on reaction with water in presence of 40%40\% sulphuric acid and 1%1\% mercuric sulphate forms

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  7. Question 7

    Asked once: 17 Apr 2026 S2

    18
    Identify the 'A' in the following reaction. CaC2+H2O→A+Ca(OH)2\mathrm{CaC_2 + H_2O \rightarrow A + Ca(OH)_2}

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  8. Question 8

    Asked once: 25 Apr 2025 S2

    71
    Identify ' AA ' in the following reaction. A→Lithium amideA \xrightarrow{\text{Lithium amide}} Ethynyl lithium →Bromoethane\xrightarrow{\text{Bromoethane}} But-1-yne

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  9. Question 9

    Asked once: 23 Apr 2025 S1

    52
    Identify product 'B' in the following sequence of reactions. 1,2-Dibromoethane →alcoholKOHA→sodamideB\xrightarrow[\text{alcohol}]{\text{KOH}} A \xrightarrow{\text{sodamide}} B

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  10. Question 10

    Asked once: 9 May 2024 S1

    58
    What is the number of moles of sp2sp^2 hybrid carbon atoms in one mole of hexa-1, 4 diyne?

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