General Science for Class 7

Dispersion of Light
A blue filter would allow
green and red to pass
blue and its components to pass
blue color only to pass
all colors except blue
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Electric Circuits and Currents
If one bulb goes out in parallel circuit, the others will
stay on
also turn off
blow up
heat up
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Investigating Space
The cloud of gas and dust forms a
disc
ball
galaxy
cube
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Heat Transfer
The faster the particles vibration,
the more the frequency of waves
the more the amplitude of waves
the more the wavelength of waves
the lesser the amplitude of waves
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Reproduction in Plants
Mostly the colors of the flowers pollinated by birds are
red, orange or yellow
green, blue or purple
pink, white or black
red, purple or white
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Electric Circuits and Currents
Maglev trains float on the track because of
friction
energy
electromagnetism
mechanical repulsion
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Atoms Molecules and Ions
The number of atoms which a molecule of sulphur contains, is
3
8
4
5
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Sound Waves
To avoid noise from the surroundings
soft curtains should be used
hard curtains should be used
glass windows should be used
vacuum windows should be used
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Energy Resources
Trapped heat inside the earth is known as
thermal energy
geothermal energy
heat energy
volcano
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Atoms and Atom Model
The ion with a negative charge, is known as
cation
anion
positron
negatron
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