Introduction to Alkynes

Q.

State any two applications of fractional distillation.

Q. How would you convert ethyne into benzene?

Q.

Aromatic hydrocarbons are also known as:

1. Alkenes

2. Alkyne

3. Arenes

4. Alkanes

Q. Despite having weak van der Waals forces why are alkanes so unreactive?

Q.

What is the significance of fractionating column in fractional distillation?

Q. Give the IUPAC name of $C{l}_{2}CHC{H}_{2}OH$:

Q. Why is Wurtz reaction not preferred for the preparation of alkanes containing odd number of carbon atoms? Illustrate your answer by taking one example.

Q.

Name the method for separation of alcohol from the mixture of alcohol and water.

Q.

Which of the following gases is used for welding

1. Ethene

2. Ethane

3. Methane

4. Acetylene

Q. Give a brief description of the principles of distillation.

Q.

How is the mixture of miscible liquids separated?

Q.

Why do alkynes have higher b.p and m.p than alkanes and alkenes?

Q.

What is the principle of fractional distillation?

Q.

Q. The hydrocarbon in which all the four valencies of carbon atoms are fully utilised by the single covalent bond are called:

1. alkenes
2. alkynes
3. alkanes
4. none of the above

Q. Suggest methods for the separation of the following mixtures
(i) a mixture of liquid A (bp 365K) and liquid B (bp 355 K)
(ii) a mixture of liquid C (bp 348 K) and liquid D (bp 478 K).

Q.

IUPAC name of

1. 2, 2, 5, 5-Tetramethylhex-3-yne

2. None of these

3. 2, 5, 5-Trimethylhex-3-yne

4. 2, 2, 5-Trimethylhex-3-yne