The most suitable reagent for the following conversion, is: ![NEET 2019 Chemistry, Hydrocarbons — question figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/616059730283de43c87e3e22/Chemistry/images/Hydrocarbons/66bcbfc5ae81d148616b23fa/question_1__q_66bcbfc5ae81d148616b23fa__cdn-question-pool.getmarks.app__e50a700d-6a23-4769-b5d6-b030ad2b74e6-image__92089013d4_final_ppt_sync.png)

![NEET 2019 Chemistry, Hydrocarbons — solution figure](https://prepforbharat.s3.ap-south-1.amazonaws.com/exam/616059730283de43c87e3e22/Chemistry/images/Hydrocarbons/66bcbfc5ae81d148616b23fa/solution_1__q_66bcbfc5ae81d148616b23fa__cdn-question-pool.getmarks.app__bc69d8df-c0d1-42a7-8886-a29e84f1f6fd-image__e7341534d2_final_ppt_sync.png) (i) Na/ Liquid ${\text{NH}}_{3}$ (Birch reduction) it reduces non-terminal alkynes into alkene (trans/anti addition) (ii) ${H}_{2}/Pd-C,$ quinoline (lindlar catalyst) reduces alkyne into alkene by syn addition. This will give the required product. (iii) $Zn/HCl$ is Clemmensen reduction which reduced carbonyl into an alkene. (iv) $H{g}^{+2}/{H}^{\oplus },{H}_{2}O$ is an electrophilic addition reaction, which converts alkyne into ketone.

NEET UG 2019 — Chemistry Organic Chemistry

2019mcqhard

The most suitable reagent for the following conversion, is:

NEET 2019 Chemistry, Hydrocarbons — question figure

Official previous-year question

Held on 30 Apr 2019 · Verified 9 Jul 2026.

Options

A
Na/liquid $N{H}_{3}$
B
${H}_{2}, Pd/C,$ quinoline
C
$Zn/HCl$
D
$H{g}^{2+}$ / ${H}^{+}, {H}_{2}O$

Did you get this right?

Solution

NEET 2019 Chemistry, Hydrocarbons — solution figure

(i) Na/ Liquid ${\text{NH}}_{3}$ (Birch reduction) it reduces non-terminal alkynes into alkene (trans/anti addition)

(ii) ${H}_{2}/Pd-C,$ quinoline (lindlar catalyst) reduces alkyne into alkene by syn addition. This will give the required product.

(iii) $Zn/HCl$ is Clemmensen reduction which reduced carbonyl into an alkene.

(iv) $H{g}^{+2}/{H}^{\oplus },{H}_{2}O$ is an electrophilic addition reaction, which converts alkyne into ketone.

Your note

NEET UG Organic Chemistry in other years

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NEET UG 2019 — Chemistry Organic Chemistry

2019mcqhard

The most suitable reagent for the following conversion, is:

NEET 2019 Chemistry, Hydrocarbons — question figure

Official previous-year question

Held on 30 Apr 2019 · Verified 9 Jul 2026.

Options

A
Na/liquid $N{H}_{3}$
B
${H}_{2}, Pd/C,$ quinoline
C
$Zn/HCl$
D
$H{g}^{2+}$ / ${H}^{+}, {H}_{2}O$

Did you get this right?

Solution

NEET 2019 Chemistry, Hydrocarbons — solution figure

(i) Na/ Liquid ${\text{NH}}_{3}$ (Birch reduction) it reduces non-terminal alkynes into alkene (trans/anti addition)

(ii) ${H}_{2}/Pd-C,$ quinoline (lindlar catalyst) reduces alkyne into alkene by syn addition. This will give the required product.

(iii) $Zn/HCl$ is Clemmensen reduction which reduced carbonyl into an alkene.

(iv) $H{g}^{+2}/{H}^{\oplus },{H}_{2}O$ is an electrophilic addition reaction, which converts alkyne into ketone.

NEET UG 2019 — Chemistry Organic Chemistry

Options

Did you get this right?

Solution

Your note

NEET UG Organic Chemistry in other years

More NEET UG Organic Chemistry questions

Other Chemistry topics for NEET UG

Physical Chemistry

Inorganic Chemistry

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NEET UG 2019 — Chemistry Organic Chemistry

Options

Did you get this right?

Solution

Your note

NEET UG Organic Chemistry in other years

More NEET UG Organic Chemistry questions

Other Chemistry topics for NEET UG

Physical Chemistry

Inorganic Chemistry

Keep practicing Organic Chemistry