ferric sulphate
ferric oxalate
ferric nitrate
ferric chloride
B. ferric oxalate
Gasoline
Benzoline
Kerosene
Petroleum ether
ethyl alcohol
methyl alcohol
carbon monoxide
carbon dioxide
a very sweet smell
a very pungent smell
an irritating smell
no smell at all
copper and tin
aluminium and magnesium
copper and zinc
copper, tin and zinc
sulphanilamide
quinine
methicillin
novocaine
Distillation of water
Action of heat on potassium chlorate
Powdering of glass
Burning of an electric lamp
Activated charcoal
Anthracite coal
Diamond
Graphite
wood charcoal
animal charcoal
coconut charcoal
lamp black
dichloro-phenoxy-acetic acid
superphosphate of lime
chlorofluorocarbons (CFC)
dichloro-diphenyl-trichloro-ethane
animal charcoal
coal
wood charcoal
sugar charcoal
streptomycin
terramycin
aureomycin
codein
calcium carbonate
calcium bicarbonate
magnesium sulphate
calcium sulphate
to make air a moderate supporter of combustion
to maintain the density of air constant
to prevent the hydrogen in air from exploding
to reduce the poisonous nature of ozone in air
ethane
ethylene
acetylene
methane
nitrogen
nitrous oxide
nitric oxide
nitrogen peroxide
phenol
washing soda
absolute alcohol
vinegar
gold
zinc
tin
molybdenum
Rusting of iron
Burning of magnesium
Sublimation of iodine
Electrolysis of water
from coal mines
when wood is burnt in excess of air
by heating coal out of contact with air
by heating wood out to contact with air
carbohydrates
proteins
salts
fats
Gasoline
Kerosene
Sulphuric acid
Alcohol
contracts while setting
expands while setting
is highly volatile
does not suffer any changes in volume while setting
adrenalin
glucagon
epinephrin
thyroxin
manganese
copper
potassium
plumbum
calcium carbonate
sodium carbonate
magnesium sulphate
ferric chloride
Protons
Neutrons
Electrons
Protons and electrons
Tungsten steel
Manganese steel
Chromium steel
Nickel steel
land pollution
air pollution
noise pollution
water pollution
gypsum
urea
potassium nitrate
ammonium phosphate
oxidise ammonia to nitrates
convert nitrogen into ammonia
oxidise ammonia to free nitrogen
oxidise ammonia to oxides of nitrogen