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n-propyl bromide on treating with alcoho...

n-propyl bromide on treating with alcoholic KOH produces

A

Propyne

B

Propanol

C

Propane

D

Propene

Text Solution

Verified by Experts

The correct Answer is:
D
`underset("Propyl bromine")(CH_3CH_2CH_2)Br + underset(alc.)(KOH) rarr underset("propene")(CH_3CH)=CH_2 + KBr + H_(2)O`
This reaction removes a molecule of HX and therefore, the reaction is called dehydrohalogenation. The hydrogen atom is eliminated from `beta`- carbon atom (carbon atom next to the carbon to which halogen is attached). Therefore the reaction is also called `beta` elimination reaction.
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Knowledge Check

  • n-propyl bromide on treatment with alcoholic KOH produces

    A
    propane
    B
    propane
    C
    propyne
    D
    hypnotic

  • Propyl bromide on reaction with alcoholic KOH gives-

    A
    Propane+Ethane
    B
    Propene
    C
    Butane
    D
    Acetylene

  • Ethyl bromide on treatment with alcoholic KOH gives

    A
    Ethylene
    B
    Ethanol
    C
    Acetic acid
    D
    Ethane
    • ERRORLESS-HYDROCARBONS-NCERT BASED QUESTION (ALKENE)
    1. n-propyl bromide on treating with alcoholic KOH produces

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    2. Ethyl bromide on treatment with alcoholic KOH gives

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    3. When 2-bromobutane reacts with alcoholic KOH, the reaction is called

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    4. When alocoholic solution of ethylene dibromide is heated with granulat...

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    5. n-propyl bromide on treatment with ethanolic potassium hydroxide produ...

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    6. Which reagent used to test unsaturation of alkenes ?

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    7. Which of the following yields both alkane and alkene ?

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    8. Alcoholic solution of KOH is used for ,

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    9. Which of the following reactions can be used for the synthesis of an a...

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    10. Cyclopentene on treatment with alkaline KMnO(4) gives

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    11. 2-chlorobutane is heated with alcoholic NaOH, the product formed in la...

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    12. When 2-chloro-2-methylbutane is heated with alcoholic KOH the possible...

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    13. What is obtained, when propene is treated with N-bromo succinimide :

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    14. The dehydrohalogenation of neopentyl bromide with alcoholic KOH mainly...

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    15. X in the above reaction is

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    16. The disappearance of the characteristic purple colour of KMnO(4) in it...

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    17. Dilute aqueous KMnO4 , at room temperature reacts with R-CH=CH-R to gi...

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    18. Aqueous sulphuric acid reacts with 2-methyl-1-butene to give predomina...

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    19. Which of the following is not used to distinguish ethene from ethane

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    20. The compounds that will give an isomer of 2, 2-dimethyl propane on cat...

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