Soil erosion
Soil wash
Silting of soil
Soil creep
A. Soil erosion
Argon
Vanadium
Iodine
Sulphur
Orion
Terylene
Rayon
Nylon
The varying amount of sunspot activity
The tilt of the earth's rotation relative to the ecliptic as earth revolves around the sun
The earth's orbit around the sun as an exlipse rather than a circle
The rotation of during a 24-hour day
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
Carbon Monoxide
Phosgene
Phosphine
None of these
Deep Green
Violet
Prussian Blue
Yellow
Conversion of nitrogen to nitric acid.
Production of nitrogen from air
Convert the atmospheric nitrogen to effective nitrogen compound.
Liquifaction of nitrogen
An atom
A cation
A molecule
An anion
autogamy
entomophily
anemophily
ornithophily
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
Silver
Magnesium
Platinium
Mercury
Nucleic acid
Carbohydrate
Collagen
Polymer
It activate H2O molecule
Photo-electricity reaction starts
Some of the gas molecules become bigger
It cause combination of oxygen and nitrogen
core
photosphere
sunspots
corona
6 feet
6 metres
60 cms
60 feet
1H1
1H2
6C12
8O16
Magnetic forces
Gravitational forces
Coulombic forces
Exchange forces
None of these
Ultraviolet rays
Infra Red rays
Cosmic Rays
Cat
Bear
Rabbit
Dog
Atomic warfare
Depletion of earth's ozone layer
CO2 from fossil fuels
Dust clouds from valcanoes
Desiccation
Efflorescence
Deliquescene
Osmosis
Pyrex glass
Soft glass
Flint glass
Jena glass
Methane, Butane and Propane
Methane, Ethane and Hexane
Ethane, Hexane and Nonane
Methane, Hexane and Nonane
Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide
evaporation
condensation
sublimation
deposition
A Black solid
A red liquid
A highly inflammable gas
colourless gas insoluble in water
Carbon
Hydrogen
Aluminium
Silicon
permeable
semipermeable
selectively permeable
impermeable
Atomic number
Atomic mass
Quantum numbers
None of these
lion
man
jaguar
cheetah