Apparatus invented by Archimedes is :
Pulley
Microscope
Thermemoter
Barometer
Correct Answer :
A. Pulley
Related Questions
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
The recent atomic weight scale is based on
1H1
1H2
6C12
8O16
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 speed of light with the rise in the temperature of the medium
Increases
Remains unaltered
Drops sharply
Decreases
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
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
The oxide of Nitrogen used in medicine as anaesthetic is
Nitric oxide
Nitrogen dioxide
Nitrogen pentoxide
Nitrous oxide
The intencity of Earthquakes is measured on
Beaufort scale
Secant scale
Mercalli scale
Richter scale
The fastest acting enzyme in the biological kingdom is
amylase
lipase
carboxypeptidase
carbonic anhydrase
The Panda belongs to the same family as that of
Cat
Bear
Rabbit
Dog
The chemial name of Uria is
Carbamide
Chloroetane
Aneurin
None of these
The metal that is present in Photo Films is
Silver
Magnesium
Platinium
Mercury
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
The metal used in storage batteries
Zinc
Iron
Copper
Lead
One fathom is equal to
6 feet
6 metres
60 cms
60 feet
Apparatus invented by Archimedes is :
Pulley
Microscope
Thermemoter
Barometer
The formula of Plaster of Paris is
2CaSO4, H2O
CaSO4
CaSO4, 2H2O
2CaSO4, 4H2O
The type of glass used in making prisms and lenses is
Pyrex glass
Soft glass
Flint glass
Jena glass
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
Sulphonates
Zeolites
Nitrates
None of these
In an atomic nucleus, neutrons and protons are held together by
Magnetic forces
Gravitational forces
Coulombic forces
Exchange forces
The colour of Emerald is
Deep Green
Violet
Prussian Blue
Yellow
The property of a substance to absorb moisture from the air on exposure is called
Desiccation
Efflorescence
Deliquescene
Osmosis
The element present in the largest amount in rocks and minerals is
Carbon
Hydrogen
Aluminium
Silicon
Pollination by birds is called
autogamy
entomophily
anemophily
ornithophily
The location and energy of an electron in an atom can be specified by
Atomic number
Atomic mass
Quantum numbers
None of these
Polythene is industrially prepared by the polymerisation of
styrene
methane
ethylene
acetylene
What is the unit for measuring the pitch or frequency of sound ?
Coulomb
Hum
Cycles
Decible
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