Reactions of Alkenes and Alkynes

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Reactions of Alkenes and Alkynes: Overview

This topic covers concepts, such as, Chemical Reactions of Alkenes, Electrophilic Addition Reactions of Alkenes, Reduction of Alkenes by N-Bromo Succinamide & Diels-Alder Reaction of Alkene etc.

Important Questions on Reactions of Alkenes and Alkynes

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The number of stereoisomers obtained by reaction of cis-2-butene with bromine in the presence of water is: 

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When propyne is treated with aqueous  H 2 S O 4 in presence of  HgS O 4, the major product is:

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The product(s) obtained via hydration (HgSO4+H2SO4) of 1-butyne would be:

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Baeyer’s reagent is:

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2-Phenylpropene on acidic hydration, gives:

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Which one of the following alkenes will react fastest with H2 under catalytic hydrogenation condition?

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Which of the following will decolourise alkaline KMnO4 solution?

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Which one of the following has the smallest heat of hydrogenation per mole of hydrogen gas?

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The number of possible structural and configurational isomers of a bromo compound, formed by the addition of 1 mole of HBr to 2-pentyne respectively, are –

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The total number of products obtained by bromination of trans-2 butene is

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How many reagents from the list below give effervescence when reacted with 1-pentyne?

NaOH(I), CH3CH2ONa(II), CH3CH2MgBr(III), NaH(IV), NaNH2(V), NaVI, NaHCO3(VII), (CH3)2CH2NLi(VIII), CH3CH2LiIX, C6H5LiX

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Examine the structural formulas of the following compounds and find how many compounds will produce CO2 on oxidative ozonolysis:

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The total number structural isomers of alkynes that on catalytic reduction gives 3-ethyl-4-methylheptane are:

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Of the following reactions, how many reactions are considered as oxidation reactions?

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How many of the following on reductive ozonolysis will give only glyoxal?  Ethylene, acetylene, 1,3-butadiene, benzene, o-xylene, m-xylene, p xylene, cyclobutadiene, cyclooctatetraene.

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What is the product of above Diels-Alder reaction? 

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Ozonolysis of ethene gives which of the following compound?

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In the following reaction

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X and Y, respectively, are