Old-written material, which cannot be read easily can be read by
None of these
Ultraviolet rays
Infra Red rays
Cosmic Rays
Correct Answer :
A. None of these
Related Questions
Nitrification means
Conversion of nitrogen to nitric acid.
Production of nitrogen from air
Convert the atmospheric nitrogen to effective nitrogen compound.
Liquifaction of nitrogen
The major ingredient of leather is
Nucleic acid
Carbohydrate
Collagen
Polymer
Rust is
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
The metal used in storage batteries
Zinc
Iron
Copper
Lead
Which of the following elements is a metal
S
Ga
Se
I
Which of the following parts of the sun is easily visible only during a total solar eclipse?
core
photosphere
sunspots
corona
The marine animal called dugong which is vulnerable to extinction is a/an
Amphibian
Shark
Bony fish
Mammal
Glass is made from the mixture of
Quartz and mica
Sand and salt
Sand and silicates
None of these
Which of the following is commonly called a polyamide ?
Orion
Terylene
Rayon
Nylon
Which of the following is the lightest metal ?
Mercury
Lithium
Lead
Silver
Epoxy resins is used as
Adhesives
Detergents
Insecticides
Moth repellants
The colour of Emerald is
Deep Green
Violet
Prussian Blue
Yellow
Which of the following elements is obtained from sea weeds ?
Argon
Vanadium
Iodine
Sulphur
Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called
Carbon Monoxide
Phosgene
Phosphine
None of these
Water has maximum density at
0°C
-4°C
100°C
4°C
Pollination by birds is called
autogamy
entomophily
anemophily
ornithophily
When a gas is turned into a liquid, the process is called
evaporation
condensation
sublimation
deposition
The metallic constituents of hard water are
Calcium, magnesium and iron
Magnesium, Calcium and tin
Magnesium, tin and iron
Iron, tin and calcium
Which of the following elements is non-radioactive?
Uranium
Plutonium
Thorium
Zirconium
Earth's seasons are caused by which of the following?
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
The smallest functional and structural unit of kidney is called as
Granulocyte
Neuron
Reticulocyte
Nephron
The oxide of Nitrogen used in medicine as anaesthetic is
Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide
The element present in the largest amount in rocks and minerals is
Carbon
Hydrogen
Aluminium
Silicon
The Panda belongs to the same family as that of
Cat
Bear
Rabbit
Dog
Which of the following items will be attracted to the north pole of a permanent magnet by a magnet force?
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
The fastest acting enzyme in the biological kingdom is
amylase
lipase
carboxypeptidase
carbonic anhydrase
The accumulation of stress along the boundaries of lithospheric plates results in which of the following?
Earthquakes
Magnetic reversals
Hurricanses
Increased deposition of deep-sea sediments
Cell membrane is
permeable
semipermeable
selectively permeable
impermeable
Brass gets discoloured in air due to the presence of which gas in air
Carbon dioxide
Hydrogen Sulphide
Oxygen
Nitrogen
Bromine is
A Black solid
A red liquid
A highly inflammable gas
colourless gas insoluble in water