an oxidation process
a reduction process
a physical change
an electro-chemical process
D. an electro-chemical process
carbon monoxide
carbon dioxide
methane
phosgene
nitric acid
oxalic acid
carbonic acid
acetic acid
decomposition of petrol
fermentation of animal and plant waste
destructive distillation of coal
electrolysis of water
cobalt
tin
manganese
platinum
adrenalin
glucagon
epinephrin
thyroxin
magnesium chloride
sodium chloride
calcium sulphate
potassium chloride
conc. H2SO4
conc. HCl
conc. HNO3
acetic acid
stearic acid
sodium hydroxide
palmitic acid
glycerol
contracts while setting
expands while setting
is highly volatile
does not suffer any changes in volume while setting
Oxygen
Air
Hydrogen
Chlorine
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
Petrol
Kerosene
Hydrazine
Alcohol
glucose
fructose
sucrose
maltose
tuberculosis
cancer
typhoid
malaria
chlorine
carbon monoxide
sulphur dioxide
o-cresol
n-heptane
n-octane
iso-heptane
iso-octane
kerosene
naphtha
lubricating oil
asphalt
ammonia
ammonium nitrate
ammonium chloride
ammonium nitrite
CaO
Ca(OH)2
NaOH
Na2CO3
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
loss of electrons
gain of electrons
gain of oxygen
removal of hydrogen
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
brass
common salt
cane sugar
water
proteins
carbohydrates
tannins
lipids
shaking with caustic soda solution
shaking with water
fractional distillation of liquid air
passing air over heated magnesium
Radon
Astatine
Cesium
Ruthenium
iodine
sulphur
graphite
phosphorus
in the treatment of malaria
to relieve sleepiness
to induce sleep
to lower body temperature
manganese
copper
potassium
plumbum
homogeneous, sulphates
heterogeneous, nitrates
heterogeneous, carbonates
homogeneous, silicates