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 geometry around the carbon atoms in an alkyne molecule.
Describe the hybridization of carbon atoms in ethyne.
Describe the physical state and odor of lower alkynes at room temperature.
Explain why alkynes are less reactive than alkenes towards electrophilic addition reactions.
Explain why alkynes burn with a sooty flame.
Explain why terminal alkynes are more acidic than alkenes and alkanes.
What is the IUPAC name of CH3C≡CCH3?
What is the major product when propyne reacts with HBr?
Which of the following is a correct method for preparing alkynes? (1) Dehydrohalogenation of vicinal dihalides (2) Dehydration of carboxylic acids (3) Oxidation of alkanes (4) Reduction of ketones
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 highly soluble in water (2) They undergo substitution reactions (3) They undergo addition reactions (4) They are aromatic compounds
Which of the following is a terminal alkyne? (1) 2-Butyne (2) 1-Butyne (3) 2-Pentyne (4) 3-Hexyne
Alkynes are generally _______ in water but _______ in organic solvents.
Fill in the blank: The addition of water to ethyne in the presence of HgSO4 and H2SO4 gives _______.
Fill in the blank: The reaction of ethyne with cold dilute KMnO4 gives _______.
Fill in the blank: The reaction of ethyne with hydrogen in the presence of a nickel catalyst gives _______.
Alkynes are more reactive than alkanes towards electrophilic addition reactions. Yes or No?
Alkynes can be converted to alkenes by catalytic hydrogenation. True or False?
Alkynes can be prepared by the action of alcoholic KOH on vicinal dihalides. True or False?
Alkynes can be prepared by the dehydrohalogenation of vicinal dihalides. True or False?
