ajkpsc past papers with Most repeated MCQS
> In general, wind speed of 105–137 caused
minor or no damage.
>> Acid rain is mainly caused by emissions of Sulfur
Dioxide and Nitrogen Oxide in the atmosphere.
>> About 50% of the Earth’s crust, including the
waters on the Earth and atmosphere, is Oxygen.
>> The fourth state of matter is Plasma.
>> The device used to convert Alternate Current
into Direct Current is called Rectifier.
>> In night, when photosynthesis is stopped, plants
give off Carbon Dioxide.
>> During photosynthesis, plants give off Oxygen.
>> Mitochondria are called the powerhouses of the
>> Mitochondria contain their own supply of DNA.
>> The first chemical explosive, Gunpowder, is a
mixture of Sulfur, Charcoal, and Potassium
>> The number of oscillations per second is called
>> Sound waves from a loudspeaker are caused by
>> The guitar has 6 strings.
>> The device used to measure movements of the
heart is Cardiograph.
>> The unit used to measure ‘Pressure’ is Pascal.
>> There are 3 methods of heat transfer.
>> If we heat one end of metallic rod, the other
end gets hot. The method of heat transfer is
>> A person seated in front of a fire receives heat
>> The unit used to measure ‘magnetic flux’ is
>> Battery was invented by Volta.
>> The most abundant element in the earth’s crust
is oxygen. The second most abundant element
in the earth’s crust is Silicon.
>> The nearest planet to the Sun is Mercury.
>> Bronze is an alloy of Copper, Tin.
>> Molecules with identical molecular formulae
but with different structural formulae are called
>> One way of transfer of heat energy is
‘convection’ which occurs in Liquids and gasses.
>> Liquids are incompressible.
>> The key factor in determining the weather is the
quantity of Water vapour in the atmosphere.
>> The entropy of the universe is increasing.
>> Radiation methods of heat transfer can take
place in a vacuum.
>> Neutrons were discovered by James Chadwick.
>> Mass Spectrograph was invented by F.W. Aston.
>> Nucleus was discovered by Rutherford.
>> Observation > Hypothesis > Experiments is the
process of science.
>> Salty water can be made pure by the method of
>> Energy can be converted from one form to another, but all energy ends up as Heat energy.
>> A battery converts Chemical energy into
>> Geothermal is NOT a non-renewable energy
>> Current is the flow of Electrons.
>> The unit of current is Ampere.
>> To prevent electric shocks, a Fuse is placed in
>> Electrons were discovered by J.J. Thomson.
>> When molten rock cools and solidifies, the
igneous rocks are formed.
>> Molten rock below the surface of the Earth is
>> Molten rock above the surface of the Earth is
>> The metal which is liquid at room temperature
>> Between the melting point and boiling point of
a substance, the substance is a Liquid.
>> The visible cloud of dust and gas in space is
>> The average salinity of the Earth’s oceans in 1
kilogram of sea water is about 35 grams of salt.
>> The most abundant substance that constitutes
the mass of the Earth is Iron.
>> The Earth’s atmosphere is divided into 5 main
>> Rocks which are formed by high temperature
and pressure on existing rocks over a period of
time are called metamorphic rocks.