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Science Quiz for Secondary Class - Part 2

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1.  Which atmospheric layer is closest to Earth's surface?
a.  Troposphere
b.  Stratosphere
c.  Ionosphere
d.  Mesosphere



2.  The pressure exerted by a force of 1 Newton (N) acting over an area of 1 square metre is defined as
a.   Force
b.   Pascal
c.   Energu
d.   None of the above



3.  What is Pascal?
a.   unit of  weight
b.   unit of time
c.   unit of distance
d.   unit of pressure



4.  Which of the following instruments is used to measure atmospheric pressure?
a.  Nanometer
b.  Speedometer
c.  Barometer
d.  Thermometer



5.  Which of the following prevents harmful UV (ultra violet) radiation from reaching Earth?
a.   Ozone
b.   Nitrogen
c.   Oxygen
d.   All of the above



6.  Oxygen can be prepared in the laboratory by heating
a.  Potassium permanganate (KMnO4)
b.  Potassium chlorate (KClO3)
c.  Electrolysis of water
d.  All of the above



7.   A substance that accelerates the rate of a chemical reaction without taking part in it is called a
a.   Byproduct
b.   Catalyst
c.   Sediment
d.   Residue




8.  Which of the following is not a physical property of oxygen?
a.   It is a colorless and odorless gas.
b.  It is slightly soluble in water.
c.  It is lighter than air.
d.  None of the above



9.  A chemical reaction in which oxygen is added to an element or a compound s is called
a.  Oxidation
b.  Reduction
c.  Radiation
d.  Precipitation



10.  Which of the following gases is present abundantly in air?
a.    Oxygen
b.   Carbon-di-oxide
c.   Nitrogen
d.   Water vapour



11.  Which of the following is used to store living cells and important tissues?
a.    Liquid oxygen
b.    Liquid nitrogen
c.    Liquid carbon-di-oxide
d.   Ice



12. Soluble salts of nitric acid present in the soil are known as
a.   Nitrates
b.   Ligaments
c.   Acids
d.   Bases



13.  The root nodules of which of the following plants have nitrogen-fixing bacteria?
a.    Paddy plants
b.   Wheat plants
c.   Mustard plants
d.   Leguminous plants



14.  Chemical reaction in which there is gain of hydrogen is called
a.    Oxidation
b.    Reduction
c.    Decomposition
d.    Neutralization



15.  The smallest particle of an element that displays the properties of that element is called a / an
a.    Molecule
b.   Compound
c.   Substance
d.   Atom

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