evaporation
using a magnet
sublimation
sedimentation
C. sublimation
ZnSO4 . 7H2O
FeSO4 . 7H2O
MgSO4 . 7H2O
CaSO4 . 2H2O
magnetic oxide of iron
ferric oxide
ferrous oxide
ferrous carbonate
coal gas
producer gas
water gas
gobar gas
cotton
wool
cellulose
silk
iodine
sulphur
graphite
phosphorus
CaO
Ca(OH)2
NaOH
Na2CO3
poling
tempering
calcination
galvanising
a deliquescent substance
an efflorescent substance
a hygroscopic substance
a dehydrating substance
nitrogen
nitrous oxide
nitric oxide
nitrogen peroxide
manganese
copper
potassium
plumbum
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
its molecular weight is low
it is denser than ice
it is a good solvent for many ionic substances
the molecules of water are joined by hydrogen bonds
zinc
red phosphorus
magnesium
sulphur
hydrogen
nitrogen
oxygen
noble gases
calcium
sodium
magnesium
potassium
manganese dioxide
bauxite
animal charcoal
quicklime
chlorine
nitrogen
sulphur
hydrogen
carbohydrates
carbides
hydrocarbons
carbonyls
loss of electrons
gain of electrons
gain of oxygen
removal of hydrogen
chlorination
boiling
adding caustic soda
ozonisation
Oxygen
Nitrogen
Hydrogen
Chlorine
sodium nitrate
Potassium nitrate
sodium thiosulphate
ammonium chloride
shaking with caustic soda solution
shaking with water
fractional distillation of liquid air
passing air over heated magnesium
sodium chloride in water
iodine in alcohol
sulphur in carbon disulphide
Potassium iodide in water
chrome steel
silicon steel
stainless steel
invar
three
four
one
five
bleaching powder
iodoform
sulphur dioxide
chlorine
Tin
Silver
Iodine
Arsenic
Carbon dioxide
Sulphur dioxide
Ammonia
Hydrogen
Rutherford
Moseley
Niels Bohr
J.J. Thomson