Gasoline
Kerosene
Sulphuric acid
Alcohol
C. Sulphuric acid
galena
dolomite
sylvine
pitchblende
ten
twenty
zero
fifty
the initial showers wash the atmosphere free from most of the impurities
it contains desirable salts like sodium chloride and ammonium nitrate
it dissolves the gases in the atmosphere like ozone which are good for health in small quantities
it is supposed to be 'heaven sent'
whooping cough
tetanus
diphtheria
All the three
Baking soda
Milk
Chloroform
Copper wire
ferric sulphate
ferric oxalate
ferric nitrate
ferric chloride
Silicon
Oxygen
Carbon
Calcium
bakelite
polythene
PVC
Teflon
Rutherford
Moseley
Niels Bohr
J.J. Thomson
sucrose
maltose
glucose
fructose
nickel
aluminium
mercury
calcium
rain water
river water
conductivity water
deep well water
Sodium
red phosphorus
white phosphorus
sulphur
benzene
methane
ethane
butane
1 and 3
2 and 3
1, 2 and 4
1, 2, 3 and 4
a carbohydrate
a protein
a lipid
a hormone
wrought iron
steel
pig iron
nickel steel
mercaptans
propylene
carbon disulphide
phosgene
contracts while setting
expands while setting
is highly volatile
does not suffer any changes in volume while setting
kerosene
naphtha
lubricating oil
asphalt
gypsum
urea
potassium nitrate
ammonium phosphate
animal charcoal
coal
wood charcoal
sugar charcoal
iron with zinc
zinc with iron
copper with silver
silver with gold
Polyethylene
Nylon
Terylene
Rayon
Lead
Tin
Zinc
Aluminium
carbohydrates
carbides
hydrocarbons
carbonyls
lead
chromium
zinc
tin
6.023 x 1022
1 x 10-14
cl 6.056 x 10-6
6.023 x 1023
A - Z
A + Z
Z
A
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