Introduction to Alkynes

Q. Simple differentiation between alkanes, alkenes and alkynes.

Q.

Why are alkanes relatively unreactive?

Q.

Which of the following is not a saturated hydrocarbon?

1. Cyclohexane

2. Benzene

3. Isobutane

4. Butane

Q. Write the structural formula for 3-chlorohexane.

Q.

What are the sources for alkynes? Give the general formula of alkynes.

Q.

Alkenes and alkynes are unsaturated compounds.

1. True

2. False

Q.
___ are the class of hydrocarbons containing carbon-carbon triple bond.

1. Carboxylic acids
2. Alkanes
3. Alkenes
4. Alkynes

Q. IUPAC nomenclature of $C{H}_3-C{H}_2-C\equiv CH$ is

1. But-4-yne
2. Pent-2-yne
3. Butyne
4. But-2-yne

Q. We get pungent smell when there is LPG leakage even though natural gas is odourless. Identify the proper reason for this smell.

1. LPG gas undergoes oxidation
2. Energy companies add rotten egg smell
3. LPG gas reacts with the atmosphere
4. LPG gas is highly compressed

Q. Are Ethene- Ethylene
Propene-proplylene
and, Butene-Butylene the same

Q.

___ are the class of hydrocarbons containing carbon-carbon triple bond.

Q.

Write a short note on hydrocarbons and how they are formed

Q. Unsaturated hydrocarbons burns with a _____ flame.

1. red
2. sooty
3. green
4. blue

Q. The hydrocarbons having double or triple bond in their structure are unsaturated hydrocarbons.

1. True
2. False

Q. Compounds having the same general formula & similar chemical properties are part of homologous series.

1. True
2. False

Q. The hydrocarbons having double or triple bond in their structure are unsaturated hydrocarbons.

1. True
2. False

Q. The most important and useful source of alkyne is :

1. carbon
2. natural gas
3. water gas
4. producer gas

Q.

Which of the following is the correct general formula of alkyne?

1. C_nH_2n+2

2. C_nH_2n

3. C_nH_2n+1

4. C_nH_2n-2

Q. Write the structural formula for 4-iodononane.

Q. Unsaturated hydrocarbons burns with a _____ flame.

1. blue
2. green
3. sooty
4. red

Q. Unsaturated hydrocarbons burns with a _____ flame.

1. red
2. sooty
3. green
4. blue

Q. Alkynes occur in nature in:

1. free state
2. partially free state
3. combined state
4. none of these

Q. Which of the following are unsaturated hydrocarbons?

1. $(C{H}_3{)}_{3}C-C{H}_3$
2. $(C{H}_3{)}_{2}C=C{H}_2$
3. $H_{3}C-C{H}_2-C{H}_2-C{H}_3$
4. $H_{3}C=C-C{H}_3$