3. Categorise the following in different types of changes you have read about in this chapter.
Formation of dew, baking of bread, melting of gold, burning of hydrogen gas, folding of paper to make
an airplane, drawing on paper, breaking of a sheet of glass
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Formation of dew - reversible & physical change
baking of bread - irreversible & physical change
melting of gold - reversible & physical change
burning of hydrogen gas - irreversible & chemical change
folding of paper to make an airplane - reversible & physical change
drawing on paper - irreversible & physical change
breaking of a sheet of glass - irreversable & physical change
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