The most important ore of Aluminium is
Calamine
Calcite
Galena
Bauxite
Correct Answer :
D. Bauxite
Related Questions
The metal that is present in Photo Films is
Silver
Magnesium
Platinium
Mercury
Permanent hardness of water can be removed by adding
Potassium Permanganate
Bleaching Powder
Chlorine
Washing Soda
The solar eclipse occurs when
the sun comes in between the moon and the earth
the moon comes in between the sun and the earth
the earth comes in the between the sun and the moon
None of the above
According to Daltons atomic theory the smallest particle which can exist independently is
An atom
A cation
A molecule
An anion
The fastest acting enzyme in the biological kingdom is
amylase
lipase
carboxypeptidase
carbonic anhydrase
Brass gets discoloured in air due to the presence of which gas in air
Carbon dioxide
Hydrogen Sulphide
Oxygen
Nitrogen
One fathom is equal to
6 feet
6 metres
60 cms
60 feet
What is the unit for measuring the pitch or frequency of sound ?
Coulomb
Hum
Cycles
Decible
The Panda belongs to the same family as that of
Cat
Bear
Rabbit
Dog
In an atomic nucleus, neutrons and protons are held together by
Magnetic forces
Gravitational forces
Coulombic forces
Exchange forces
In a certain electronic circuit the output is positive if input 1 is positive and input 2 is zero. If both inputs are positive the output is zero. This is
an AND circuit
an OR circuit
a high-pass filter
a NOR circuit
The intencity of Earthquakes is measured on
Beaufort scale
Secant scale
Mercalli scale
Richter scale
The metallic constituents of hard water are
Calcium, magnesium and iron
Magnesium, Calcium and tin
Magnesium, tin and iron
Iron, tin and calcium
Polythene is industrially prepared by the polymerisation of
styrene
methane
ethylene
acetylene
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
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
Which of the following is in liquid form at room temperature ?
Sodium
Cerium
Francium
Lithium
Which of the following elements is obtained from sea weeds ?
Argon
Vanadium
Iodine
Sulphur
The formula of Plaster of Paris is
2CaSO4, H2O
CaSO4
CaSO4, 2H2O
2CaSO4, 4H2O
Carbon tetrachloride fire extinguisher should not be used in closed room because it produces poisonous glass called
Carbon Monoxide
Phosgene
Phosphine
None of these
The oxide of Nitrogen used in medicine as anaesthetic is
Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide
The property of a substance to absorb moisture from the air on exposure is called
Desiccation
Efflorescence
Deliquescene
Osmosis
When a gas is turned into a liquid, the process is called
evaporation
condensation
sublimation
deposition
Which of the following elements is a metal
S
Ga
Se
I
Apparatus invented by Archimedes is :
Pulley
Microscope
Thermemoter
Barometer
Which of the following parts of the sun is easily visible only during a total solar eclipse?
core
photosphere
sunspots
corona
The speed of light with the rise in the temperature of the medium
Increases
Remains unaltered
Drops sharply
Decreases
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
Cell membrane is
permeable
semipermeable
selectively permeable
impermeable
The hardest substance available on earth is
Platinum
Quartz
gold
Diamond