Preparation and Properties of Alkynes
Chemistry ⇒ Carbon and Organic Chemistry
Preparation and Properties of Alkynes starts at 11 and continues till grade 12.
QuestionsToday has an evolving set of questions to continuously challenge students so that their knowledge grows in Preparation and Properties of Alkynes.
How you perform is determined by your score and the time you take.
When you play a quiz, your answers are evaluated in concept instead of actual words and definitions used.
See sample questions for grade 11
Calculate the number of moles of ethyne produced when 64 g of calcium carbide reacts completely with water. (Atomic masses: Ca = 40, C = 12, H = 1, O = 16)
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?
What is the product when 1-butyne reacts with ammoniacal silver nitrate?
What is the product when ethyne reacts with excess bromine?
Write the balanced chemical equation for the dehydrohalogenation of 1,2-dibromoethane to form ethyne.
Write the equation for the preparation of ethyne from calcium carbide and water.
Write the IUPAC name of HC≡CH.
Write the structural formula of 2-pentyne.
A student attempts to prepare 1-butyne by treating 1,2-dibromobutane with alcoholic KOH. Write the stepwise mechanism for this reaction, including the type of elimination involved at each stage.
Calculate the mass of calcium carbide (CaC2) required to produce 11.2 L of ethyne at STP. (Molar mass of CaC2 = 64 g/mol; 1 mol gas at STP = 22.4 L)
Describe the effect of Lindlar's catalyst on the hydrogenation of alkynes and explain the stereochemistry of the product formed.
Explain why alkynes undergo nucleophilic addition reactions more readily than alkenes, despite both containing π bonds.
