Alkanes and alkenes are homologous series of hydrocarbons - Leaving Cert Chemistry - Question 6 - 2013
Question 6
Alkanes and alkenes are homologous series of hydrocarbons.
(a) Name two major sources of hydrocarbons.
(b) (i) A drum of LPG is shown on the right. It contains an ... show full transcript
Worked Solution & Example Answer:Alkanes and alkenes are homologous series of hydrocarbons - Leaving Cert Chemistry - Question 6 - 2013
Step 1
Name two major sources of hydrocarbons.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
Two major sources of hydrocarbons are:
Crude oil (petroleum)
Natural gas
Step 2
What do the letters LPG stand for?
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
LPG stands for Liquefied Petroleum Gas.
Step 3
Give the IUPAC name for C3H8.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The IUPAC name for C3H8 is Propane.
Step 4
What are these compounds?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The compounds added to LPG and natural gas for safety are called mercaptans or sulfur compounds.
Step 5
How do they make the use of LPG and natural gas safer?
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
They make the use of LPG and natural gas safer by giving the gas a noticeable odor, which helps in detecting leaks.
Step 6
Give one common use of LPG.
97%
121 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
One common use of LPG is for cooking and heating in residential stoves.
Step 7
Name this compound.
96%
114 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The compound C6H6 is known as Benzene.
Step 8
Draw its structural formula.
99%
104 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The structural formula for Benzene (C6H6) is:
C
/ \
C C
| |
C C
\ /
C
Step 9
Name this hydrocarbon.
96%
101 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The hydrocarbon shown is Methylbenzene, also known as Toluene.
Step 10
Would you expect its octane number to be high or low?
98%
120 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
I would expect its octane number to be high.
Step 11
Give a reason for your answer.
97%
117 rated
Only available for registered users.
Sign up now to view full answer, or log in if you already have an account!
Answer
The reason is that Methylbenzene (Toluene) contains an aromatic ring, which contributes to its stability and higher octane rating.
Join the Leaving Cert students using SimpleStudy...
