Reversible and Irreversible Changes
When a material is burnt it forms new material by using gas from atmosphere called
oxygen
nitrogen
carbonmono oxide
carbon dioxide
oxygen
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Raw egg is completely different in shape, color, taste, smell fromA. boiled egg
B. fried egg
C. both a and b
D. organic egg
If sugar is heated it undergoes
A. reaction
B. evaporation
C. condensation
D. decomposition
Changes in matter takes place
A. in day
B. noon
C. night
D. all the time
Changes in matter can be observed upon
A. separating
B. filtering
C. mixing
D. heating
In case of chocolate the heating lead to changes which are
A. reversible
B. irreversible
C. same
D. constant
To fry or boil an egg we need
A. pan
B. heat
C. water
D. match stick
Oil and gas catch fire
A. easily
B. slowly
C. not at all
D. extinguisher
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