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Stability order of tetra-, tri- and di-substituted alkenes

The same question, asked 2 times: 11 May 2023 S2, 15 May 2023 S2. Every wording below, oldest first.

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  1. Question 1

    11 May 2023 S2

    59
    Identify the correct stability order of following alkenes. (I) (CH3)2C=C(CH3)2(CH_3)_2C=C(CH_3)_2 (II) (CH3)2C=CH2(CH_3)_2C=CH_2 (III) (CH3)2C=CHCH3(CH_3)_2C=CHCH_3

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  2. Question 2

    15 May 2023 S2

    54
    The correct stability order of alkyl substituted alkenes is

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