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Physical and Chemical Changes
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Physical and Chemical Changes
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Physical and Chemical Changes
Ethene is obtained from
light oil
coconut oil
olive oil
sunflower oil
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Physical and Chemical Changes
The world’s first successful plastic was made in
1770
1870
1970
1980
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Physical and Chemical Changes
In liquids the intermolecular force of attraction is equal to
potential energy
kinetic energy
thermal energy
nuclear energy
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Physical and Chemical Changes
The odour of ammonia is
sweet
attractive
weak
strong and pungent
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Physical and Chemical Changes
Plastics are made up of
small molecules
small atoms
large atoms
large molecules
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Physical and Chemical Changes
By heating the color of mixture of sulphur and iron which is yellow turns to
black
brown
dark grey
white
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Physical and Chemical Changes
Bakelite is a good
conductor
insulator
metal
solid
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Comment
Physical and Chemical Changes
The intermolecular force of attraction between molecules in solids are
weaker than gases
stronger than gases but weaker than liquids
stronger than both, liquids and gases
weaker than gases but stronger than liquids
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Comment
Physical and Chemical Changes
When particles cool down, energy changes
from kinetic to heat
from kinetic to potential
from potential to kinetic
from thermal to potential
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Physical and Chemical Changes
A component without which fertilizer is incomplete, is
ammonia
nitrogen
methane
ethene
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