What is the unit for measuring the pitch or frequency of sound ?
Coulomb
Hum
Cycles
Decible
Correct Answer :
D. Decible
Related Questions
Apparatus invented by Archimedes is :
Pulley
Microscope
Thermemoter
Barometer
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
Which of the following elements is a metal
S
Ga
Se
I
The location and energy of an electron in an atom can be specified by
Atomic number
Atomic mass
Quantum numbers
None of these
Permanent hardness of water, due to sulphates of the metal, can be destroyed by the use of
Sulphonates
Zeolites
Nitrates
None of these
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
Old-written material, which cannot be read easily can be read by
None of these
Ultraviolet rays
Infra Red rays
Cosmic Rays
Water has maximum density at
0°C
-4°C
100°C
4°C
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 recent atomic weight scale is based on
1H1
1H2
6C12
8O16
The type of glass used in making prisms and lenses is
Pyrex glass
Soft glass
Flint glass
Jena glass
Which of the following parts of the sun is easily visible only during a total solar eclipse?
core
photosphere
sunspots
corona
The most important ore of Aluminium is
Calamine
Calcite
Galena
Bauxite
The Panda belongs to the same family as that of
Cat
Bear
Rabbit
Dog
Which of the following is commonly called a polyamide ?
Orion
Terylene
Rayon
Nylon
The property of a substance to absorb moisture from the air on exposure is called
Desiccation
Efflorescence
Deliquescene
Osmosis
Cell membrane is
permeable
semipermeable
selectively permeable
impermeable
The intencity of Earthquakes is measured on
Beaufort scale
Secant scale
Mercalli scale
Richter scale
Which of the following is in liquid form at room temperature ?
Sodium
Cerium
Francium
Lithium
The smallest functional and structural unit of kidney is called as
Granulocyte
Neuron
Reticulocyte
Nephron
Epoxy resins is used as
Adhesives
Detergents
Insecticides
Moth repellants
According to Daltons atomic theory the smallest particle which can exist independently is
An atom
A cation
A molecule
An anion
Quartz crystals normally used in quartz clocks etc. is chemically
A mixture of B and C
Silicon dioxide
Germenium dioxide
Sodium Silicate
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 speed of light with the rise in the temperature of the medium
Increases
Remains unaltered
Drops sharply
Decreases
Pollination by birds is called
autogamy
entomophily
anemophily
ornithophily
Polythene is industrially prepared by the polymerisation of
styrene
methane
ethylene
acetylene
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
Brass gets discoloured in air due to the presence of which gas in air
Carbon dioxide
Hydrogen Sulphide
Oxygen
Nitrogen
Which of the following elements is obtained from sea weeds ?
Argon
Vanadium
Iodine
Sulphur