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General Science
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Biological Sciences
50
Modern Materials
21
Atomic Structure
87
Energy Resources
43
Elements and Substances
76
Plant Photosynthesis and Respiration
52
Space and Solar System
230
General Science for Class 6
1155
General Science for Class 7
2197
General Science for Class 8
0
Basics of Electricity
28
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Electric Circuits and Currents
The electricity which involves in attraction is known as
static electricity
current
practical electricity
magnetic electricity
Author:
rikazzz
Comment
Dispersion of Light
‘Refractive index’ is equal to
speed of light in material /speed of light in vacuum
speed of light in material/speed of light in air
speed of light in vacuum/speed of light in material
speed of light in vacuum/speed of light in air
Author:
rikazzz
Comment
Physical and Chemical Changes
‘Ethene’ is composed of
two carbon and three hydrogen atoms
one carbon and one hydrogen atom
two carbon and four hydrogen atoms
three carbon and six hydrogen atoms
Author:
rikazzz
Comment
Dispersion of Light
If the angle of incidence of light while leaving the denser object is zero, the light would
be reflected back
go straight without any refraction
be refracted
end up at the boundary of the object
Author:
rikazzz
Comment
Atoms Molecules and Ions
Electrons orbiting around nucleus bear
positive charge
negative charge
no charge
neutral charge
Author:
rikazzz
Comment
Electric Circuits and Currents
Anything that slows down the flow of electricity in a circuit is known as
current
offensive power
resistance
high voltage
Author:
rikazzz
Comment
Transportation in Plants
The transportation of food and mineral salts from leaves to all other parts of the plant by phloem is known as
translocation
transpiration
respiration
photosynthesis
Author:
rikazzz
Comment
Heat Transfer
Just like light, radiant heat can also be
reflected
turned off
used in LED
effective
Author:
rikazzz
Comment
Feeding Relationships and Environment
The energy which is absorbed by the green plants, is about
20 percent of sunlight
30 percent of sunlight
40 percent of sunlight
50 percent of sunlight
Author:
rikazzz
Comment
Atoms Molecules and Ions
The size of a single atom is
1nm
0.1nm
0.11nm
1.0nm
Author:
rikazzz
Comment
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