Preparation and Properties of Alkynes
Chemistry ⇒ Carbon and Organic Chemistry
Preparation and Properties of Alkynes starts at 11 and continues till grade 12.
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Describe the acidity of terminal alkynes compared to alkenes and alkanes.
Describe the difference between terminal and internal alkynes.
Explain why alkynes are less reactive than alkenes towards electrophilic addition reactions.
Explain why alkynes undergo addition reactions more readily than alkanes.
Name the product formed when 1,2-dibromoethane is treated with alcoholic KOH.
State the hybridization of carbon atoms in ethyne.
State the product formed when ethyne is partially hydrogenated using Lindlar’s catalyst.
What is the IUPAC name of CH≡C–CH3?
Which of the following alkynes is a terminal alkyne?
(1) 2-Butyne
(2) 1-Butyne
(3) 2-Pentyne
(4) 3-Hexyne
Which of the following is a general formula for alkynes?
(1) CnH2n+2
(2) CnH2n
(3) CnH2n-2
(4) CnH2n-6
Which of the following is a property of alkynes?
(1) They are generally insoluble in water.
(2) They are highly soluble in water.
(3) They are always solids at room temperature.
(4) They do not undergo addition reactions.
Which of the following is a test for terminal alkynes?
(1) Baeyer's test
(2) Tollen's test
(3) Ammoniacal AgNO3 test
(4) Lucas test
Fill in the blank: The addition of hydrogen to an alkyne in the presence of Lindlar’s catalyst produces a _______.
Fill in the blank: The reaction of ethyne with water in the presence of HgSO4 and H2SO4 gives _______ as the major product.
The reaction of calcium carbide with water produces _______.
The triple bond in alkynes consists of _______ sigma bond(s) and _______ pi bond(s).
Alkynes are more reactive than alkanes towards electrophilic addition reactions. Yes or No?
Alkynes can be prepared by the action of sodamide (NaNH2) on alkyl halides. True or False?
Alkynes can be prepared by the dehydrohalogenation of vicinal dihalides. True or False?
Alkynes can react with ammoniacal silver nitrate to form a white precipitate. True or False?
