wrought iron
steel
pig iron
nickel steel
A. wrought iron
an oxidation process
a reduction process
a physical change
an electro-chemical process
neon
argon
helium
krypton
hydrochloric acid
citric acid
tartaric acid
acetic acid
A
C
B12
B1
tuberculosis
cancer
typhoid
malaria
neutrons
protons
protons and neutrons
protons and electrons
Burning of magnesium ribbon in air
Distillation of water
Heating of cane sugar
Setting of cement
Cataphoresis
Osmosis
Dehydration
Diffusion
6.023 x 1022
1 x 10-14
cl 6.056 x 10-6
6.023 x 1023
Aluminium
Copper
Zinc
Iron
Chloroform
Morphine
Streptomycin
Cocaine
malathion
parathion
zinc phosphide
diuron
valency
atomic mass
number of neutrons
atomic number
bakelite
polythene
PVC
Teflon
dichloro-phenoxy-acetic acid
superphosphate of lime
chlorofluorocarbons (CFC)
dichloro-diphenyl-trichloro-ethane
atomic number
valency
atomic mass
atomic radius
is unaffected by temperature variations
decreases with increase of temperature
increases with decrease of temperature
increases with increase of temperature
evaporation
using a magnet
sublimation
sedimentation
wood charcoal
animal charcoal
coconut charcoal
lamp black
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.
they may appear better
they can resist the action of acids and alkalies
they lose their brittleness
they can withstand temperature shocks
wrought iron
steel
pig iron
nickel steel
Baking soda
Milk
Chloroform
Copper wire
adrenalin
thyroxin
insulin
epinephrine
Carbon disulphide
Chloroform
Carbon tetrachloride
Methylene chloride
Oxygen
Nitrogen
Hydrogen
Chlorine
50% water
10% water
70% water
20% water
Nitric acid
Hydrochloric acid
Silver nitrate
Sulphuric acid
A mixture of potassium nitrate and carbon
A mixture of ammonium chloride and sodium nitrate
A mixture of potassium chlorate and manganese dioxide
A mixture of ammonium nitrate and charcoal
Palladium
NaCI
KOH
Dilute H2SO4