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Which one is the correct order of acidit...

Which one is the correct order of acidity ?

A

`CH-=CH gt CH_3 -C -=CH gt CH_2 =CH_2 gt CH_3 -CH_3`

B

`CH-=CH gt CH_2 =CH_2 gt CH_3 -C -=CH gt CH_2- CH_3`

C

`CH_3-CH_3 gt CH_2 =CH_2 gt CH_3 -C -= CH gt CH-=CH`

D

`CH_2=CH_2 gt CH_3 -CH=CH_2`

Text Solution

Verified by Experts

The correct Answer is:
A
`+I`-Effect of `CH_3` group increases the electron-density in the C-H bond thereby decreasing its tendency to release a proton. Thus, propyne is less acidic than ethyne. Thus, the acidity of ethane, ethene , ethyne and propyne decreases in the order : option (a) is correct.
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PRADEEP-HYDROCARBONS-Competition Focus (JEE(main and advanced)/Medical Entrance) I. MULTIPLE CHOICE QUESTIONS
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  2. The correct order of increasing basicity of the given conjugate bases ...

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  3. Which one is the correct order of acidity ?

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  5. Predict the product C obtained in the following reaction of butyne-1. ...

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  6. What is the product formed when acetylene reacts with hypochlorous aci...

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  7. What would be the expected product of the reaction of propyne with Br2...

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  8. The product(s) obtained via oxymercuration (HgSO(4) + H(2)SO(4)) of 1-...

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  9. Predict the correct intermediate and product in the following reaction...

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  10. Which 2-butyne is treated with dil .H(2)SO(4)/HgSO(4), the product for...

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  11. Identify the product in the reaction PhC-=CMe overset(H3O^(+),Hg^(2+)?...

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  12. In the following reaction : C2H2 underset(HgSO4//H2SO4)overset(H2O)t...

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  13. Identify the reagents in the following transformations :

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  14. The reagents to carry out the following conversion are

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  15. In the reaction H-C-=CH underset((2)CH3CH2Br)overset((1)NaNH2//liq.N...

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  16. The reagent 'X' used for the following reaction is

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  17. The trans-alkenes are formed by the reduction of alkynes with

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  18. 2-Hexyne gives trans -2- hexene on treatment with :

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  19. The isomerism of 2-butyne to 1-butyne can be achieved by treatment wit...

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  20. Identify X in the following sequence of reactions : CH3-undersetunde...

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