Question

why chemical properties of substances change during chemical combination

Answer 1

because each and every ion dissociate to form other molecule and it only depend on reaction

Answer 2

$\huge\mathfrak\red{Heya \: Mate}$
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$\huge\mathfrak\blue{Answer:}$
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● Change in colour
● Change in shape and size
● A new substance is formed
● Either its giving heat or taking it in
● Expansion can also happen

》The chemical reaction produces a new substance with new and different physical and chemical properties.Matter is never destroyed or created in chemical reactions. The particles of one substance are rearranged to form a new substance. The same number of particles that exist before the reaction exist after the reaction.
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Hope it helps u
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