A mixture of FeO and Fe(OH)2
A mixture of Fe2O3 and Fe(OH)2
A mixture of Fe2O3, 3H2O and FeO
FeO only
C. A mixture of Fe2O3, 3H2O and FeO
Earthquakes
Magnetic reversals
Hurricanses
Increased deposition of deep-sea sediments
Carbon
Hydrogen
Aluminium
Silicon
evaporation
condensation
sublimation
deposition
Calcium, magnesium and iron
Magnesium, Calcium and tin
Magnesium, tin and iron
Iron, tin and calcium
amylase
lipase
carboxypeptidase
carbonic anhydrase
Argon
Vanadium
Iodine
Sulphur
Desiccation
Efflorescence
Deliquescene
Osmosis
1H1
1H2
6C12
8O16
Sulphonates
Zeolites
Nitrates
None of these
Carbon Monoxide
Phosgene
Phosphine
None of these
Silver
Magnesium
Platinium
Mercury
Adhesives
Detergents
Insecticides
Moth repellants
lion
man
jaguar
cheetah
0°C
-4°C
100°C
4°C
Beaufort scale
Secant scale
Mercalli scale
Richter scale
Carbamide
Chloroetane
Aneurin
None of these
an AND circuit
an OR circuit
a high-pass filter
a NOR circuit
Calamine
Calcite
Galena
Bauxite
Increases
Remains unaltered
Drops sharply
Decreases
S
Ga
Se
I
2CaSO4, H2O
CaSO4
CaSO4, 2H2O
2CaSO4, 4H2O
A mixture of FeO and Fe(OH)2
A mixture of Fe2O3 and Fe(OH)2
A mixture of Fe2O3, 3H2O and FeO
FeO only
Amphibian
Shark
Bony fish
Mammal
Atomic warfare
Depletion of earth's ozone layer
CO2 from fossil fuels
Dust clouds from valcanoes
Nucleic acid
Carbohydrate
Collagen
Polymer
Sodium
Cerium
Francium
Lithium
Mercury
Lithium
Lead
Silver
Coulomb
Hum
Cycles
Decible
Quartz and mica
Sand and salt
Sand and silicates
None of these
A piece of iron that is not a permanent magnet
The north pole of another permanent magnet
A positively charged glass rod
A negatively charged rubber rod