Concepts Covered - 1

Preparation of Alkynes

Calcium carbide: Ethyne is prepared by treating calcium carbide with water. Calcium carbide is prepared by heating quick lime with coke. Quick lime can be obtained by heating limestone as shown in the following reactions:

$\mathrm{CaCO}_{3} \stackrel{\Delta}{\longrightarrow} \mathrm{CaO}+\mathrm{CO}_{2}$

$\mathrm{CaO}+3 \mathrm{C} \longrightarrow \mathrm{CaC}_{2}+\mathrm{CO}$

$\mathrm{CaC}_{2}+2 \mathrm{H}_{2} \mathrm{O} \longrightarrow \mathrm{Ca}(\mathrm{OH})_{2}+\mathrm{C}_{2} \mathrm{H}_{2}$

Vicinal dihalides: Vicinal dihalides on treatment with alcoholic potassium hydroxide undergo dehydrohalogenation. One molecule of hydrogen halide is eliminated to form alkenyl halide which on treatment with sodamide gives alkyne.

Using Zinc:

Vicinal tetrahaloalkanes can be dehalogenated with zinc metal in an organometallic reaction to form alkynes.

UPES B.Tech Admissions 2025

Apply

Ranked #42 among Engineering colleges in India by NIRF | Highest Package 1.3 CR , 100% Placements | Last Date to Apply: 30th July | Limited seats available in select program

Amity University Noida B.Tech Admissions 2025

Apply

Among Top 30 National Universities for Engineering (NIRF 2024) | 30+ Specializations | AI Powered Learning & State-of-the-Art Facilities

Sharda University Admissions 2025

Apply

North India's Largest Educational Group | NIRF Ranked 86 | NAAC A+ Grade | Highest Package 1.6 Cr | Applications Closing on 31st July

Graphic Era (Deemed to be University) Admissions 2025

Apply

NAAC A+ Grade | Among top 100 universities of India (NIRF 2024) | 40 crore+ scholarships distributed

Pimpri Chinchwad University B.Tech Admissions

Apply

1000+ Recruiters | 450+ Patents | 50000+ Alumni network

NIELIT University(Govt. of India Institution) Admissions

Apply

Campuses in Ropar, Agartala, Aizawl, Ajmer, Aurangabad, Calicut, Imphal, Itanagar, Kohima, Gorakhpur, Patna & Srinagar

Preparation of Alkynes - Practice Questions & MCQ

Quick Facts

Solve by difficulty

Concepts Covered - 1

Study it with Videos

Study other Related Concepts

Preparation of Alkynes Current Topic

Books

Reference Books

Preparation of Alkynes

Clear your Basics with NCERT

E-books & Sample Papers

Get Answer to all your questions

JEE Main Articles

UPES B.Tech Admissions 2025

Amity University Noida B.Tech Admissions 2025

Sharda University Admissions 2025

Graphic Era (Deemed to be University) Admissions 2025

Pimpri Chinchwad University B.Tech Admissions

NIELIT University(Govt. of India Institution) Admissions

Explore on Careers360

JEE Main

JEE Advanced

AP EAMCET

TS EAMCET

Colleges By Degree

Colleges By Branches

Colleges By Exam

By City

By State

BE/B.Tech

Diploma

Download Careers360 App

All this at the convenience of your phone

Scan and download the app