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Physical and Chemical Changes
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Physical and Chemical Changes
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Physical and Chemical Changes
The reaction in which heat is taken while taking place, is known as
exothermic reaction
endothermic reaction
reversible reaction
substitutive reaction
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Physical and Chemical Changes
To make PVC, molecules of vinyl chloride are
condensed
further heated
treated with ammonia
gathered to form a chain
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Physical and Chemical Changes
The texture of ‘polythene’ is
hard and rough
hard and smooth
soft and rough
soft and smooth
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Physical and Chemical Changes
The name of the inventor who invented plastic is
John Dalton
John Green
Albert Einstein
John Hyatt
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Physical and Chemical Changes
Alteration of material without changing its chemical make-up is known as
physical change
chemical variation
biological change
chemical change
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Physical and Chemical Changes
PVC sheets are also used to make
umbrellas
chimneys
rain coats
water proof bags
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Physical and Chemical Changes
Photosynthesis is an example of
condensation reaction
exothermic reaction
reversible reaction
endothermic reaction
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Physical and Chemical Changes
The new form of ‘polythene’ is called
polypropene
polybutene
high density polyethene
low density polyethene
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Physical and Chemical Changes
Generally methane gas is known as
compressed gas
liquid gas
natural gas
artificial gas
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Physical and Chemical Changes
In mixture, the particles of iron and sulphur are
separate
chemically bonded
biologically bonded
permanently bonded
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