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Engineering
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2- methylbutane on reacting with bromine in the presence of sunlight gives mainly

  • Option 1)

    1 - bromo­-2- methylbutane

  • Option 2)

    2 - bromo­-2- methylbutane

  • Option 3)

    2 - bromo­-3- methylbutane

  • Option 4)

    1 - bromo­-3- methylbutane

 
As we learnt Chemical Reaction Halogenation of alkane - When alkane react with halogen in presence of UV light it give free radical substitution reaction. - wherein    Bromine gets substituted to hydrogen where carbon has least number of hydrogen atoms. Reactivity order of abstraction of H towards bromination of alkane is      Option 1) 1 - bromo­-2- methylbutane This option is...
Engineering
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Reaction of one molecule of H\! Br with one molecule of 1,3-butadiene at 40°C gives predominantly

  • Option 1)

    3-bromobutene under kinetically controlled conditions

  • Option 2)

    1-bromo -2-butene  under thermodynamically controlled conditions

  • Option 3)

    3- bromobutene under thermodynamically controlled conditions

  • Option 4)

    1-bromo -2-butene under kinetically controlled conditions

 
As we learnt in  Addition of Hydrogen Halide on alkene - hydrogen halides add up to alkenes to form alkyl halides. The order of reactivity of the hydrogen halides is HI>HBr>HCl - wherein       Option 1) under kinetically controlled conditions This option is incorrect. Option 2)   under thermodynamically controlled conditions This option is correct. Option 3) under thermodynamically...
Engineering
436 Views   |  

Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is

  • Option 1)

    n-hexane

  • Option 2)

    2,3­-dimethylbutane

  • Option 3)

    2,2-­dimethylbutane

  • Option 4)

    ­2-methylpentane

 

Option;-2- 2,3-dimethyl butane

Engineering
778 Views   |  

Acid catalyzed hydration of alkenes except ethene leads to the formation of

  • Option 1)

    primary alcohol

  • Option 2)

    secondary or tertiary alcohol

  • Option 3)

    mixture of primary and secondary alcohols

  • Option 4)

    mixture of secondary and tertiary alcohols

 
As we learnt in  Addition of water - In presence of dilute H2SO4 alkene give addition of water according to Markovnikov's rules. - wherein   Water adds to more reactive alkenes in the presence of acids to yield alcohols. The addition follows markovnikov's rule.   Option 1) primary alcohol This option is incorrect. Option 2) secondary or tertiary alcohol This option is correct. Option...
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