Which of the following is the lightest metal ?
Mercury
Lithium
Lead
Silver
Correct Answer :
B. Lithium
Related Questions
Epoxy resins is used as
Adhesives
Detergents
Insecticides
Moth repellants
The marine animal called dugong which is vulnerable to extinction is a/an
Amphibian
Shark
Bony fish
Mammal
The smallest functional and structural unit of kidney is called as
Granulocyte
Neuron
Reticulocyte
Nephron
In an atomic nucleus, neutrons and protons are held together by
Magnetic forces
Gravitational forces
Coulombic forces
Exchange forces
The speed of light with the rise in the temperature of the medium
Increases
Remains unaltered
Drops sharply
Decreases
The fastest acting enzyme in the biological kingdom is
amylase
lipase
carboxypeptidase
carbonic anhydrase
Old-written material, which cannot be read easily can be read by
None of these
Ultraviolet rays
Infra Red rays
Cosmic Rays
The element present in the largest amount in rocks and minerals is
Carbon
Hydrogen
Aluminium
Silicon
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
The location and energy of an electron in an atom can be specified by
Atomic number
Atomic mass
Quantum numbers
None of these
The intencity of Earthquakes is measured on
Beaufort scale
Secant scale
Mercalli scale
Richter scale
The property of a substance to absorb moisture from the air on exposure is called
Desiccation
Efflorescence
Deliquescene
Osmosis
Pollination by birds is called
autogamy
entomophily
anemophily
ornithophily
Which of the following parts of the sun is easily visible only during a total solar eclipse?
core
photosphere
sunspots
corona
Quartz crystals normally used in quartz clocks etc. is chemically
A mixture of B and C
Silicon dioxide
Germenium dioxide
Sodium Silicate
Permanent hardness of water can be removed by adding
Potassium Permanganate
Bleaching Powder
Chlorine
Washing Soda
Which of the following is commonly called a polyamide ?
Orion
Terylene
Rayon
Nylon
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
Sulphonates
Zeolites
Nitrates
None of these
Water has maximum density at
0°C
-4°C
100°C
4°C
Liquefied Petroleum gas (LPG) consists of mainly
Methane, Butane and Propane
Methane, Ethane and Hexane
Ethane, Hexane and Nonane
Methane, Hexane and Nonane
Glass is made from the mixture of
Quartz and mica
Sand and salt
Sand and silicates
None of these
Cell membrane is
permeable
semipermeable
selectively permeable
impermeable
Which of the following elements is obtained from sea weeds ?
Argon
Vanadium
Iodine
Sulphur
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
When a gas is turned into a liquid, the process is called
evaporation
condensation
sublimation
deposition
Which of the following is most likely to cause a rise in the average temperature of earth's atmosphere in future?
Atomic warfare
Depletion of earth's ozone layer
CO2 from fossil fuels
Dust clouds from valcanoes
The metal that is present in Photo Films is
Silver
Magnesium
Platinium
Mercury
The recent atomic weight scale is based on
1H1
1H2
6C12
8O16
Polythene is industrially prepared by the polymerisation of
styrene
methane
ethylene
acetylene
According to Daltons atomic theory the smallest particle which can exist independently is
An atom
A cation
A molecule
An anion