GENERAL SCIENCE MCQS FOR FPSC
? When one volume of concentrated HNO3 is mixed
with 3 volumes of concentrated HCL ___ is formed; Aqua Regia
?
Most abundant element in human body is ;
Oxygen
?
Symbol of sodium is ; Na
?
Chemical formula of table salt is ; Nacl
?
On pH scale ___ have value less than 7; Acid
?
_____ is used ot prevent tooth decay; Fluorine
?
Symbol of Iron is ; Fe
? Which metal is having such a low melting point
that it can melt in your hand; Gallium
? Which non metal is liquid at room temperature;
Bromine
? _____ help to remove the permanent hardness of
water; Washing soda
? When steam is passed through red hot iron,
which gas will be produced; hydrogen
?
Oxygen is prepared on a large scale from; Air
?
Which is used as a fire extinguisher; carbon
dioxide
?
Which substance is used as a lubricant ;
graphite
?
_____ is a chemical change; burning of wax
? Which is responsible for acid rain; Nitrous
oxide and sulphur dioxide
?
Hydrogen is the most ____ element; stable
? In the manufacturing of Vanaspati Ghee which
gas is used; hydrogen
?
The chemical name of laughing gas is ; Nitrous
oxide
? Which is the lightest element of periodic
table; Hydrogen
?
Which becomes vinegar if it’s impure; Acetic
acid
? Which element is found on the surface of moon;
Titanium
? Helium is used for respiration in deep water
instead of nitrogen because; it is lighter than nitrogen
? The mass of neutron is approximately ; equal
to the mass of proton
? Which gives the right indication of
composition of bronze; copper and Tin
?
Which gas is used in soda water; carbon
dioxide
?
Which form of carbon is good conductor ;
graphite
?
Which is an example of an oxide ore; Bauxite
? An instrument used for measuring atmospheric
pressure is called ; Barometer
? The branch of science which deals with
properties of matter and energy is called; Physics
? Electromagnetic wave theory of light was
proposed by ; Maxwell
? Natural radioactivity was discovered by
Becquerel in; 1896
?
X-rays were discovered by ; Roentgen
? The velocity of light was determined
accurately by; Michel Son
?
Second law of thermodynamics was given by;
Kelvin
?
Neutron was discovered by; Chadwick
?
Transistor was invented by; Bardeen
? The circumference of the earth was determined
by ; Al-Beruni
? The orbits of sun , moon and planets were
determined firstly by; Ptolemy
?
Telephone was invented by Graham Bell
?
SI unit of length is ; metre
?
SI unit of force is; Newton
?
Unit of work in SI units is; joule
?
Unit of power in SI unit is; watt
? The shortest distance between two points is
called; Displacement
?
The rate of change of displacement is called;
Velocity
? Newton third law states that; after
interaction of two bodies, action and reaction are equal but opposite in
direction
? Stoke’s law holds for; motion through a
viscous medium
?
The diffraction of light was discovered by;
Maxwell
?
The velocity of light in air or vacuum is; 3*
108 m/s
? Soap film in sunlight appears coloured due to
; interference
?
Water waves are example of ; Transverse waves
?
Sound waves are examples of ; Longitudinal
wave
? An average ear can hear sound of frequency
between; 20 to 20000 Hz
?
The radius of earth is; 6371 km
?
The mean density of earth is; 5.5 kg/m3
?
The ability of capacity to do work is called;
Energy
? Energy possessed by a body due to its motion
is called ; Kinetic Energy
? Terbela dam on Indus river produces
electricity ; 1750 mega watt
?
Wind flows from area of ; high to low pressure
?
Which shell is closed to nucleus; k-shell
?
Hydrogen bomb is an example of ; Nuclear
fission
? Atomic bomb is an example of ; controlled
nuclear fission
?
First atomic reactor was introduced by ;
Enrico Fermi
? The rate of change of angular momentum of a
body is ; the applied torque
? Lens which is thinner at the centre and
thicker at the edge is called concave lens
? A lens which is thick at the centre and
thinner at the edges is called convex lens
?
The diameter of a lens is called ; Aperture
?
Ohm is unit of what quality; Resistance
?
Calorie is unit of what quantity; heat
?
Angstrom is unit of what quantity ; length
?
Becquerel is unit of what quantity ;
Radioactivity
? Rainbow is produced by the ___ of light
through rain drop; Reflection
?
Who invented printing press; John Guttenberg
?
Which form of energy is used by electric oven;
heat
? Light can pass through objects which are ;
Transparent
?
Voltage can be calculated by formula; V=IR
?
What is the unit of capacitance; Farad
?
___ is a rectifier which converts A.C to D.C;
Diode
? ___ field is produced when current passes
through a wire; Magnetic field
? Which does not allow the passage of current ;
Insulator
? Energy in sun produced by hydrogen nuclei is
the result of ; Fusion
?
Which is the main constituent of sun; hydrogen
?
Which metal in extracted from Bauxite;
Aluminium
? Earth completes one revolution around the sun
in; 3651/4 days
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