About GK Questions with Answers free online practice test and mock test
related to basic scince general knowledge.
The planet of the solar system which has the maximum number of moons is:
a) Jupiter
b) Venus
c) Saturn
d) Uranus
e) None of these
Sun is a:
a) Planet
b) Comet
c) Satellite
d) Aurora
e) None of these
The age of the solar system is:
a) 4.5 billion years
b) 5.5 billion years
c) 6.5 billion years
d) 7.5 billion years
e) None of these
A unit of length equal to the average distance between the Earth and the Sun is called:
a) Light year
b) Astronomical unit
c) Parsec
d) Parallax
e) None of these
An eclipse of the sun occurs when:
a) The moon is between the sun and the Earth
b) The sun is between the Earth and the moon
c) The Earth is between the sun and the moon
d) The Earth casts its shadow on the moon
e) None of these
The ozone layer protects the Earth from rays sent by the sun:
a) Ultraviolet rays
b) Infrared rays
c) Gamma rays
d) Radioactive rays
e) None of these
The ozone layer is present about 30 miles (50 km) in the atmosphere above Earth. The stratum (layer) of the atmosphere in which the ozone layer lies is called:
a) Exosphere
b) Mesosphere
c) Stratosphere
d) Ionosphere
e) Troposphere
Rocks formed by the alteration of pre-existing rocks by great heat or pressure are called:
a) Igneous rocks
b) Sedimentary rocks
c) Metamorphic rocks
d) Acid rocks
e) Basic rocks
The most abundant natural iron oxides are:
a) Magnetite and Pyrite
b) Magnetite and Bauxite
c) Hematite and Pyrite
d) Hematite and Magnetite
e) Hematite and Bauxite
The most abundant elements in seawater are:
a) Sodium and Potassium
b) Sodium and Calcium
c) Sodium and Chlorine
d) Chlorine and Iodine
e) Magnesium and Sulphur
An electric current can produce:
a) Chemical effect
b) Magnetic effect
c) Heating effect
d) All of these three
e) None of these
The unit of home electricity energy consumption is:
a) Watt hour
b) Kilowatt hour
c) Joule hour
d) Kilojoule hour
e) None of these
The magnet always points in the same direction, if moved freely, i.e. towards north and south poles, because of:
a) Gravitational field
b) A lot of metals deposits on north and south poles
c) Due to attraction of north pole and repulsion of Western pole
d) Earth is a huge magnet
e) None of these
When sound is reflected from the floor, ceiling, or a wall, it mixes with the original sound and changes its complexion. This is called:
a) Sound
b) Echo
c) Reverberation
d) Noise
e) None of these
The speed of sound in dry air at 20°C is about:
a) 130 meters per second
b) 230 meters per second
c) 330 meters per second
d) 430 meters per second
e) None of these
The speed of light invacuum is about:
a) 300 Million meters per second
b) 300 Million meters per hour
c) 300 Million kilometers per second
d) 300 Million kilometers per hour
e) None of these
The time light takes from the Sun to reach Earth is:
a) 8 minutes
b) 25 minutes
c) 45 minutes
d) 60 minutes
e) None of these
The distance light travels from the Sun to reach Earth is approximately:
a) 50 Million Km
b) 100 Million Km
c) 150 Million Km
d) 200 Million Km
e) None of these
The most suitable thermometer for measuring the boiling point of water is:
a) Mercury thermometer
b) Alcohol thermometer
c) Bimetallic thermometer
d) Liquid crystal thermometer
e) None of these
The density of water is greatest at:
a) 32°C
b) 0°C
c) 4°C
d) 100°C
e) None of these
Which one of the following statements is true:
a) Gases do not conduct heat
b) The best conductors are non-metals
c) Conduction currents occur only in liquids
d) A vacuum cannot conduct heat
e) None of the statements is true.
Ice can be changed to water by:
a) Adding more water molecules
b) Changing the motion of the water molecules
c) Rearranging the atoms in water molecules
d) Destroying the atoms in water molecules
e) None of these
The building blocks of elements are called:
a) Atoms
b) Molecules
c) Compounds
d) Isotopes
e) None of these
Boiling of an egg is a change which is:
a) Physical
b) Chemical
c) Physiological
d) Morphological
e) None of these
The temperature of liquid nitrogen is:
a) -32°C
b) -80°C
c) -100°C
d) -196°C
e) None of these
Answers Key:
a) Jupiter
e) None of these (Sun is a star)
a) 4.5 billion years
b) Astronomical unit
a) The moon is between the sun and the Earth
a) Ultraviolet rays
c) Stratosphere
c) Metamorphic rocks
d) Hematite and Magnetite
c) Sodium and Chlorine
d) All of these three
b) Kilowatt hour
d) Earth is a huge magnet
c) Reverberation
c) 330 meters per second
a) 300 Million meters per second
a) 8 minutes
b) 100 Million Km
c) Bimetallic thermometer
c) 4°C
d) A vacuum cannot conduct heat
b) Changing the motion of the water molecules
a) Atoms
a) Physical
d) -196°C