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Alkynes



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Q1. Which among the following product is formed when ethyne undergoes hydrogenation?

(a) Formaldehyde
(b) Formic acid
(c) Acetaldehyde
(d) Acetic acid

Q2. Which among the following alkynes is used as a rocket fuel?

(a) Ethyne
(b) Propyne
(c) But-1-yne
(d) Pent-1-yne

Q3. Identify the incorrect statement.

(a) Alkynes exists in gaseous state
(b) They are soluble in water
(c) They are soluble in organic solvents
(d) Alkynes have a very good boiling point

Q4. The transformation into carboxylic acids of the alkynes takes place with the help of which among the following reagents?

(a) Potassium chlorate
(b) Potassium permanganate
(c) Potassium dichromate
(d) Potassium chloride

Q5. Alkynes cannot be prepared from ___________

(a) Ketones
(b) Alcohols
(c) Aldehydes
(d) Other alkynes

Q6. Majority of the alkynes are not prepared from/by ___________

(a) Condensation
(b) Acetylene
(c) Dehydrohalogenation
(d) Hydrogenation

Q7. The major alkyne, acetylene compound is produced by which among the following application on natural gas?

(a) Hydrogenation
(b) Partial oxidation
(c) Cracking
(d) Hydrohalogenation

Q8. Select the incorrect statement regarding terminal alkynes.

(a) Methylacetylene is an example of terminal alkynes
(b) Terminal alkynes are more acidic when compared with alkenes
(c) Terminal alkynes are not as acidic as alkanes
(d) These have a replaceable acidic hydrogen atom

Q9. Select the incorrect statement.

(a) The addition reactions occur more frequently in the alkenes than the alkynes
(b) The pi system of the alkynes gets weakened when they lose the pi atoms
(c) Alkynes readily undergo oligomerization
(d) Alkynes do not undergo polymerization

Q10. Alkynes are more reactive than alkenes.

(a) False
(b) True
(c)
(d)


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Iodoethane Reacts With Sodium In The Presence Of Dry Ether The Product Is

Modified 231 Year Ago

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Iodoethane Reacts With Sodium In The Presence Of Dry Ether The Product Is

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Sample Of 2, 3-dibromo-methylpentane Is Heated With Zinc Dust.The Resulting Product Is Isolated And Heated With HI In The Presence Of Phosphorus. Indicate Which Is The Structure That Represent The

Modified 231 Year Ago

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Sample Of 2, 3-dibromo-methylpentane Is Heated With Zinc Dust.The Resulting Product Is Isolated And Heated With HI In The Presence Of Phosphorus. Indicate Which Is The Structure That Represent The

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Which Of The Following Statement Is/are Not True For Ethane

Modified 231 Year Ago

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Which Of The Following Statement Is/are Not True For Ethane

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LPG Mainly Contains

Modified 1 Year Ago

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LPG Mainly Contains

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Liquid Hydrocarbons Can Be Converted To A Mixture Of Gaseous Hydrocarbons By :

Modified 1 Year Ago

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Liquid Hydrocarbons Can Be Converted To A Mixture Of Gaseous Hydrocarbons By :

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Which Of The Following Is Not Formed By The Reaction Of CL2 On CH4 In Sunlight

Modified 231 Year Ago

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231 Year Ago

Which Of The Following Is Not Formed By The Reaction Of CL2 On CH4 In Sunlight

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