loss of electrons
gain of electrons
gain of oxygen
removal of hydrogen
B. gain of electrons
Hydrolysis
Hydrogenation
Dehydration
Dehydrogenation
nickel
aluminium
mercury
calcium
as a nucleus to condense water vapour resulting in rain
to maintain the average density of air
to minimise the inflammatory nature of oxygen
to protect the inhabitants of the earth from the effects of ultra violet rays.
iodine
sulphur
graphite
phosphorus
brass
common salt
cane sugar
water
ethyl alcohol
chloroform
oxygen
methyl alcohol
dichloro-phenoxy-acetic acid
superphosphate of lime
chlorofluorocarbons (CFC)
dichloro-diphenyl-trichloro-ethane
Lead
Tin
Silver
Gold
brimstone and silica
limestone and clay
brimstone and clay
brimstone and limestone
Gasoline
Benzoline
Kerosene
Petroleum ether
Chloroform
Morphine
Streptomycin
Cocaine
A
C
B12
B1
carbon monoxide
carbon dioxide
methane
phosgene
sulphanilamide
quinine
methicillin
novocaine
Rodenticide
Herbicide
Pesticide
Fungicide
Lithium
Helium
Sodium
Cobalt
nickel
tin
iron
chromium
as a drying agent
as a refrigerant
as an antiseptic
as a bleaching agent
charcoal
bleaching powder
chlorine
carbolic acid
nuclear' fusion
radioactive disintegration
nuclear fission
chemical decomposition
neon
argon
helium
krypton
cutting off supply of oxygen
it™s being converted into carbon dioxide
its combination with haemoglobin of blood
its blocking of vocal chords
sucrose
glucose
fructose
mannose
Carbon monoxide
Oxygen
Nitrogen
Hydrogen
whooping cough
tetanus
diphtheria
All the three
iodine in potassium iodide
iodine in alcohol
iodine in water
iodine in carbon disulphide
it contains carbonates of calcium and magnesium
it contains sodium chloride
it is highly coloured
it contains suspended impurities
nervous disorders
heart diseases
anaemia
impairment of vision
a definite shape but not volume
a definite volume and shape
a definite volume but not shape
neither definite volume nor shape
a cupel
a long narrow chamber
an open furnace
a closed furnace