Form 5 Chemistry Quiz 8
Chapter 25 : Consequences of
using Fossil Fuels
Marking Schemes
1. (a) Source: coal burning power
station / burning sulphur-containing fuels
Health hazards: irritates the eyes / makes
breathing difficult / cause lung cancer / cause heart problems
Method
to remove or prevent: use low sulphur coal / install scrubber
(b) Source:
refrigerants / aerosol propellant
Health hazards:
cause (lung) cancer
Method to remove or prevent:
use environmental friendly substitutes / use less
(c) Source:
incomplete combustion of car exhausts / power station ……
Health hazards:
cause lung cancer / attack respiratory system
Method
to remove or prevent: install catalytic converter / use LPG
(d) Source: incomplete
combustion of car exhausts / power station ……
Health hazards: breathing problems / makes
blood less able to carry oxygen / cause death / toxic
Method
to remove or prevent: install catalytic converter
(e) Source:
high temperature burning in car / power station ……
Health hazards: irritates the eyes / makes
breathing difficult / cause lung cancer / cause heart problems
Method
to remove or prevent: install catalytic converter
Each
1 mark 1x15
2. (a) Sulphur
dioxide and nitrogen dioxide (Both) 1
(b) SO2 + H2O ¾® H2SO3 1
(2SO2 + 2H2O
+ O2 ¾®
2H2SO4) (1)
2NO2 + H2O
¾® HNO3 + HNO2 1
(4NO2
+ 2H2O + O2 ¾® 4HNO3 (1)
(c) Sulphurous acid /
sulphuric acid 1
nitrous
acid / nitric acid. 1
(d) Acidic soil; kill aquatic
life; corrode buildings…… 1
3. (a) Rise
in the Earth’s surface temperature leads to global warming. 1
(b) Chlorofluorocarbons/
dichlorodifluoromethane; nitrogen dioxide 1
(c) Change in
the Earth’s climate damages agriculture and food supply; ice at the poles melts
and sea level raise. 1