The element present in the largest amount in rocks and minerals is
Carbon
Hydrogen
Aluminium
Silicon
Correct Answer :
D. Silicon
Related Questions
The colour of Emerald is
Deep Green
Violet
Prussian Blue
Yellow
The intencity of Earthquakes is measured on
Beaufort scale
Secant scale
Mercalli scale
Richter scale
The Panda belongs to the same family as that of
Cat
Bear
Rabbit
Dog
The formula of Plaster of Paris is
2CaSO4, H2O
CaSO4
CaSO4, 2H2O
2CaSO4, 4H2O
Polythene is industrially prepared by the polymerisation of
styrene
methane
ethylene
acetylene
Which of the following elements is non-radioactive?
Uranium
Plutonium
Thorium
Zirconium
The location and energy of an electron in an atom can be specified by
Atomic number
Atomic mass
Quantum numbers
None of these
Nitrification means
Conversion of nitrogen to nitric acid.
Production of nitrogen from air
Convert the atmospheric nitrogen to effective nitrogen compound.
Liquifaction of nitrogen
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
Sulphonates
Zeolites
Nitrates
None of these
The oxide of Nitrogen used in medicine as anaesthetic is
Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide
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
Liquefied Petroleum gas (LPG) consists of mainly
Methane, Butane and Propane
Methane, Ethane and Hexane
Ethane, Hexane and Nonane
Methane, Hexane and Nonane
The most important ore of Aluminium is
Calamine
Calcite
Galena
Bauxite
Which of the following elements is a metal
S
Ga
Se
I
The metal that is present in Photo Films is
Silver
Magnesium
Platinium
Mercury
The chemial name of Uria is
Carbamide
Chloroetane
Aneurin
None of these
Which of the following is the lightest metal ?
Mercury
Lithium
Lead
Silver
Which of the following is in liquid form at room temperature ?
Sodium
Cerium
Francium
Lithium
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
What is the unit for measuring the pitch or frequency of sound ?
Coulomb
Hum
Cycles
Decible
The removal of top soil by water or wind is called
Soil erosion
Soil wash
Silting of soil
Soil creep
One fathom is equal to
6 feet
6 metres
60 cms
60 feet
Water has maximum density at
0°C
-4°C
100°C
4°C
Apparatus invented by Archimedes is :
Pulley
Microscope
Thermemoter
Barometer
The speed of light with the rise in the temperature of the medium
Increases
Remains unaltered
Drops sharply
Decreases
Which of the following characters is not shown by hydrogen
It burns in air to form water
It supports combustion
It readily combines with fluorine and chlorine
It combines with almost all metals forming hydrides
Old-written material, which cannot be read easily can be read by
None of these
Ultraviolet rays
Infra Red rays
Cosmic Rays
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 element present in the largest amount in rocks and minerals is
Carbon
Hydrogen
Aluminium
Silicon