Gasoline (petrol)
3 marks · Easy| Application | Percentage (%) |
|---|---|
| Domestic heating | 60 |
| Cooking | 30 |
| Other industrial uses | 10 |
Which application uses the greatest proportion of refinery gases?
Calculate the total percentage of refinery gases used for domestic purposes (heating and cooking).
State one industrial use of refinery gases, other than heating or cooking.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
(a) Domestic heating
(b) 90 %
(c) Use as a fuel in industry; feedstock for chemical synthesis.
Common mistakes: Including industrial uses in domestic purposes
Show mark scheme and worked solution
Marking points
B1 (a) · 1 mark · Correct application identified as 'domestic heating'.
M1 (b) · 1 mark · Adds 60% (heating) and 30% (cooking) for total domestic use.
B2 (c) · 1 mark · Any correct industrial use, e.g., as chemical feedstock, fuel for industrial boilers.
Worked solution
a) Domestic heating uses the greatest proportion (60%). b) Total for domestic purposes = 60% + 30% = 90%. c) One industrial use is as a feedstock for chemical synthesis.