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To synthesize the unsymmetrical alkyne C...

To synthesize the unsymmetrical alkyne `CH_3-C-=C-CH_2-CH_3` the reagents needed would be

A

Ethene, iodoethane, iodomethane and potassium hydroxide

B

Acetaldehyde, 1-bromopropane and conc. `H_(2)SO_(4)`

C

1, 2-dichloroethane, 1-propanol and alcoholic potassium hydroxide

D

Ethyne, iodomethane, iodoethane and sodamide

Text Solution

Verified by Experts

The correct Answer is:
D
`CH-=CH overset(NaNH_2)rarr CH -=C^(-)Na^(+) overset(CH_3I)underset(-NaI)rarrCH-=CH-CH_(3)`
`underset("Pent-2-yne")(C_(2)H_(5)-C-=C-CH_(3)) overset(C_2H_5I)underset(-Nal)larr Na^(+)C^(-)-=C-CH_3`
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ERRORLESS-HYDROCARBONS-NCERT BASED QUESTION (ALKYNE)
  1. Carbide which react with water to give propyne is

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  2. What is formed when calcium carbide reacts with heavy water?

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  3. To synthesize the unsymmetrical alkyne CH3-C-=C-CH2-CH3 the reagents n...

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  4. Ammong the following the one which can exist in free state as a stable...

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  5. A gas formed by the action of alcoholic KOH on ethyl iodide, decolouri...

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  6. Which of the following gases is used for the welding

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  7. The compound C3H4 has a triple bond , which is indicated by its reacti...

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  8. Identify the alkyne in the following sequence of reactions: Alkyne o...

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  9. Number of acidic hydrogen atoms in but-1-yne is

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  10. Hydration of which one of the following yields a ketone

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  11. In the reaction, CH(3)C-=C-CH(3)overset((i)X)underset((ii)Zn//H(2)O)(t...

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  12. Action of hydrogen chloride on CH3-underset(CH3)underset|C=CH2 and on ...

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  13. Towards electrophilic reagents

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  14. The reagent which is used to distinguish between propene and propyne i...

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  15. [A] overset("lindlar's")underset("catalyst")larr CH(3) - C -= C -CH(3)...

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  16. When propyne reacts with aqueous H(2)SO(4) in the presence of HgSO(4)...

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  17. Ammonical cuprous chloride will give red precipitate with which one of...

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  18. When 2-butyne is treated with H(2)//Pd - BaSO(4), the product formed w...

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  19. Which of the following reactions will yield 2,2-dibromopropane ?

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  20. CaC(2)+H(2)Orarr A overset(H(2)SO(4) // HgSO(4)) rarr B. Identify A an...

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