NEET
Practice Test 5
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A compound (X) on ozonolysis followed by reduction gives an aldehyde, C2H4O and 2-butanone, compound (X) is

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Allene (C3H4) contains :

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    Allene is H2C = C = CH2

Acetylene reacts with HCN in the presence of Ba(CN)2 to yield :

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Which of the following has highest knocking ?

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    Knocking depends upon the structure of the hydrocarbon and follows the ordern-Alkanes >branched alkanes > straight chain alkenes> branched alkenes> arenes

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Correct statement about 1, 3 -dibutene :

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    CH2 = CH-CH = CH2
    It is a conjugated diene (having alternate C = C and C – C). It reacts with HBr. It polymerises to form synthetic rubber.

Cyclohexene on reaction with cold alkaline KMnO4 forms

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    Cyclohexene + KMnO4(cold & alkaline) ⟶ cis-Hexanediol

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    is the answer because it contains two benzene rings.

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Hydrocarbons
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