General Science

Physical and Chemical Changes
Plastics are made up of
small molecules
small atoms
large atoms
large molecules
Author: rikazzz Comment
Heat Transfer
Light, radiant heat and radio waves travel at the same rate because they are
of different density
different elements
part of electromagnetic spectrum
part of energy
Author: rikazzz Comment
Atoms and Atom Model
Atoms of sodium and chlorine are stuck by chemical glue which is known as
bond
alpha gum
force of glue
atomic gum
Author: rikazzz Comment
Importance of Water
The color of water is
blue
green
white
none
Author: rikazzz Comment
Investigating Space
The temperature of surface of sun is
1000 °C
2500 °C
4000 °C
5500 °C
Author: rikazzz Comment
Heat Transfer
When warm air rises above the land,
vacuum is created beneath it
more warmer air replaces it
temperature decreases
cool air from sea replaces it
Author: rikazzz Comment
Dispersion of Light
‘Refractive index’ of ice is
0.5
1.5
1.33
1.31
Author: rikazzz Comment
Physical and Chemical Changes
By heating the color of mixture of sulphur and iron which is yellow turns to
black
brown
dark grey
white
Author: rikazzz Comment
Electric Circuits and Currents
ELCB is an abbreviation of
electrolytic circuit breaker
earth locking circuit breaker
earth leakage circuit breaker
electric leakage circuit breaker
Author: rikazzz Comment
Atoms and Atom Model
The atomic number of ‘beryllium’ is
1
2
3
4
Author: rikazzz Comment

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