Where does the ozone layer lie in the atmosphere?
A. Troposphere
B. Stratosphere
C. Mesosphere
D. Thermosphere
Correct Answer: B. Stratosphere
(more…)
The density of a gas increases, when ________?
A. Temperature is increased
B. Pressure is increased
C. Volume is kept constant
D. None of these
The crystal of ice is an example of
A. Metallic solid
B. Molecular solid
C. Covalent solid
D. Ionic solid
The principal constituent of the atmosphere of the Earth is____________.
A. Oxygen
B. Carbon
C. Hydrogen
D. Nitrogen
Which from the following is NOT a conductor?
A. Aluminium
B. Gold
C. Graphite
D. All are conductors (more…)
The most densest substance on the Earth is __________.
A. Platinum
B. Copper
C. Steel
D. Osmium (more…)
Radioactivity was discovered by __________.
A. Kelvin
B. Thomson
C. Rutherford
D. Henri Becquerel (more…)
_________ is anything that takes up space and has mass.
A. Energy
B. Gravity
C. Matter
D. Plasma
Alfred Nobel was died of ___________?
A. Heart attack
B. Cancer
C. Kidney
D. Cerebral hemorrhage
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