ethyl alcohol
methyl alcohol
carbon monoxide
carbon dioxide
D. carbon dioxide
tongue inflammation
pellagra
night blindness
anaemia
Europeans
Egyptians
Asians
Americans
tincture iodine
paints
ink
aerated water
It is spontaneous disintegration of atoms
It is induced by bombardment with projectiles
It is transmutation of atoms with projectiles
It is dependent on temperature
hydrochloric acid
ammonia
cane sugar
common salt
Lithium
Helium
Sodium
Cobalt
aquatic macrophytes
aquatic fungi
effluents
evapotranspiration
kerosene
naphtha
lubricating oil
asphalt
malathion
parathion
zinc phosphide
diuron
the percentage of carbon dioxide in air is kept almost constant
air always contains a constant proportion of oxygen
sufficient amounts of carbohydrates are produced
the process of photosynthesis proceeds smoothly
It must be free from suspended impurities
It must be free from harmful bacteria
It must contain traces of sodium bicarbonate
It must have a fishy odour
tin and copper
tin and lead
tin and zinc
tin, copper and zinc
a congenital disease
a communicable disease
an acquired disease
a contagious disease
cement an limestone
cement and sand
cement and gravel
cement, sand and gravel
dephlogisticated air
azote
inflammable air
marine acid air
a basic salt
an acid salt
a double salt
a normal salt
calcium hydroxide
washing soda
calcium chloride
zeolite
three
four
one
five
Thiokol
Drikold
Perhydrol
Mannitol
grams
pounds
carats
tons
nickel
zinc
chromium
copper
acetone
ether
ethyl alcohol
methyl alcohol
ammonium chloride
ammonium carbonate
ammonium sulphate
potassium nitrate
iron with very low percentage of carbon
iron with high percentage of carbon
iron and chromium
iron and manganese
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'
sodium amalgam
an alloy of sodium and potassium
silver amalgam
calcium amalgam
ferric sulphate
ferric oxalate
ferric nitrate
ferric chloride
xenon
krypton
argon
helium
tungsten
nickel
manganese
chromium
sucrose
glucose
fructose
mannose