wood charcoal
animal charcoal
coconut charcoal
lamp black
B. animal charcoal
glacial acetic acid
methanol
formic acid
stearic acid
phenol
TNT
picric acid
iodoform
lead chloride
mercurous chloride
mercuric chloride
calcium sulphate
1 : 1
1 : 2
2 : 3
1 : 3
iron with zinc
zinc with iron
copper with silver
silver with gold
land pollution
air pollution
noise pollution
water pollution
isobars
isotopes
isomorphs
isomers
Sedimentation
Electrophoresis
Tyndall effect
Brownian movement
phenol
iodoform
bleaching powder
blue vitriol
Terylene
Rayon
Nylon
Silk
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
bleaching powder
iodoform
sulphur dioxide
chlorine
a very sweet smell
a very pungent smell
an irritating smell
no smell at all
nickel
aluminium
mercury
calcium
nickel
copper
sulphur
graphite
Goodyear
Wohler
Baeyer
Perkin
a definite shape but not volume
a definite volume and shape
a definite volume but not shape
neither definite volume nor shape
phosphorus pentaoxide
phosphorus trichloride
phosphorus trisulphide
phosphorus trioxide
Gasoline
Kerosene
Sulphuric acid
Alcohol
cryolite
bauxite
malachite
azurite
Phenol
Benzaldehyde
Formaldehyde
Acetic acid
nuclear' fusion
radioactive disintegration
nuclear fission
chemical decomposition
as an analgesic
in the purification of water
as a fertilizer
as a disinfectant
coal gas
producer gas
water gas
gobar gas
white lead
graphite
red lead
coke
ferric sulphate
ferric oxalate
ferric nitrate
ferric chloride
iodoform
chloroform
nitrous oxide-ether mixture
chloroform-nitrous oxide mixture
phenol
washing soda
absolute alcohol
vinegar
ethane
ethylene
acetylene
methane
oxidise ammonia to nitrates
convert nitrogen into ammonia
oxidise ammonia to free nitrogen
oxidise ammonia to oxides of nitrogen