1 tonne = ________ kg
1.100
2.400
3.1000
4.4000
A loudspeaker changes ______ energy into sound energy.
1.Chemical
2.Electrical
3.Light
4.Kinetic
All electromagnetic waves have the same
1.Frequency
2.Amplitude
3.Wavelength in vacuum
4.Speed in vacuum
An instrument used to measure atmospheric pressure is
1.Ammeter
2.Manometer
3.Galvanometer
4.Barometer
An instrument used to measure electric current is called
1.Ammeter
2.Barometer
3.Galvanometer
4.Manometer
An instrument used to measure gas pressure is
1.Ammeter
2.Manometer
3.Galvanometer
4.Barometer
At night
1.The land cools faster than the water in the sea
2.The water in the sea cools faster than the land
3.The land and the water in the sea cools together
4.None of these
Atomic clock is used to measure ______ intervals of time.
1.Very short
2.Short
3.Very long
4.Long
Battery charger converts electrical energy into ______ energy.
1.Kinetic
2.Potential
3.Chemical
4.Nuclear
Battery was invented by
1.Nicolas Carnot
2.Alessandro Volta
3.Michael Faraday
4.Friedrich Bessel
Earths troposphere extends from the Earths surface to an average height of about ________ km.
1.10
2.12
3.15
4.17
Electromagnetic induction was discovered by
1.Nicolas Carnot
2.Alessandro Volta
3.Michael Faraday
4.Friedrich Bessel
Laser was invented by
1.Alessandro Volta
2.William Sturgeon
3.Hero of Alexandria
4.Theodore Maiman
Molecules with identical molecular formulae but with different structural formulae are called
1.Isomers
2.Isotopes
3.Atomic number
4.Mass number
On average, Air contains ________ % of water vapours.
1.1
2.3
3.5
4.7
Radioactivity was discovered by
1.Henri Becquerel
2.Pierre Curie
3.Marie Curie
4.Rutherford
Ships use ________ to find the depth of the ocean beneath them.
1.pitches
2.echoes
3.frequencies
4.none of these
The anode is the electrode connected to the ________ terminal of a battery.
1.positive
2.negative
3.neutral
4.free
The branch of science which study the interaction between matter and radiant energy is called
1.Thermochemistry
2.Polymer chemistry
3.Spectroscopy
4.Electrochemistry
The chemical name of chalk is
1.Sodium nitrate
2.Zinc sulfate
3.Sulphuric acid
4.Calcium carbonate
The Earths crust ranges from ________ km in depth.
1.0 – 5
2.5 – 10
3.5 – 70
4.10 – 70
The Earths internal heat mainly comes from
1.Liquid hydrogen
2.Chemical reactions
3.Radioactive decay
4.Molecular kinetic energy
The fact that universe is expanding was discovered by
1.Hahn
2.Hubble
3.Rontgen
4.Rutherford
The horizontal rows of the periodic table are called
1.Groups
2.Periods
3.Sets
4.Matrices
The interior structure of the Earth is divided into ________ layers.
1.4
2.5
3.6
4.7
The most abundant form of matter in the universe is
1.Solid
2.Liquid
3.Gas
4.Plasma
The outermost layer of the Earth is
1.Crust
2.Inner mantle
3.Outer mantle
4.Core
The reflection of sound is called
1.Frequency
2.Vibration
3.Echo
4.Wave
The science of lightning is called
1.Aerology
2.Meteorology
3.Electeorology
4.Fulminology
The shortest distance between crest to crest is called
1.phase
2.thoughs
3.amplitude
4.wavelength
The SI unit of thermodynamic temperature is
1.Celsius
2.Fahrenheit
3.Kelvin
4.None of these
The speed of sound is fastest in
1.Solids
2.Liquids
3.Gasses
4.Vacuum
The speed of sound is slowest in
1.Solids
2.Liquids
3.Gasses
4.Vacuum
The strongest part(s) of a magnet is/are
1.North pole
2.South pole
3.North and south pole
4.Median of north and south pole
The thickest layer of the Earth is
1.Crust
2.Inner core
3.Outer core
4.Mantle
The unit used to measure humidity is
1.Barometer
2.Hydrometer
3.Hygrometer
4.Galvanometer
The vernier calipers is used to measure
1.Length
2.Time
3.Temperature
4.Viscosity
The vertical columns of the periodic table are called
1.Groups
2.Periods
3.Sets
4.Matrices
There are different seasons on the Earth because of
1.Rotation of the Earth
2.Revolution of the Earth
3.The Earths axis is tilted
4.The Earths distance from the Sun
We live on the Earths
1.Inner core
2.Outer core
3.Crust
4.Mantle
When gas is ionized, ________ forms.
1.Molecule
2.Element
3.Plasma
4.Current
Which electromagnetic wave has the longest wavelength?
1.Gamma rays
2.X-rays
3.Microwaves
4.Radio waves
Which electromagnetic wave has the shortest wavelength?
1.Gamma rays
2.X-rays
3.Microwaves
4.Radio waves
Which from the following has the greatest ionizing power?
1.Alpha particles
2.Beta particles
3.Gamma rays
4.All three has same ionizing power
Which from the following has the greatest penetrating power?
1.Alpha particles
2.Beta particles
3.Gamma rays
4.All three have same penetrating power
Which from the following has the greatest speed?
1.Alpha
2.Beta
3.Gamma
4.None of these
Which metallic element is liquid at room temperature?
1.Zinc
2.Nickel
3.Lead
4.Mercury
Which non-metallic element is liquid at room temperature?
1.Bromine
2.Flourine
3.Chlorine
4.Phosphorous
Wind is caused by
1.Difference in atmospheric pressure
2.Difference in atmospheric temperature
3.Rotation of the Earth
4.Revolution of the Earth
Wind speed is measured by
1.Anemometer
2.Barometer
3.Ceilometer
4.Galvanometer