One of the following does not happen during a chemical reaction. This is:
(a) Breaking of old chemical bonds and formation of new chemical bonds
(b) Formation of new substances with entirely different properties
(c) Atoms of one element change into those of another element to form new products.
(d) A rearrangement of atoms takes place to form new products.

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Solution

(c) atoms of one element change into those of another element to form new products

It is not atoms but the bonds between these atoms break and form during chemical reactions. Atoms of elements can rearrange but cannot change into other element.

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Similar questions

One of the following does not happen during a chemical reaction. This is :

(a) Breaking of old chemical bonds and formation of new chemical bonds

(b) Formation of new substances with entirely different properties

(d) A rearrangement of atoms takes place to form new products.

Assertion:- The products formed in a chemical reaction has entirely different properties to that of reactants.

Reason:- Bonds between the atoms of reactants break and form new bonds to make products.

Which of the following cause a substance to change into an entirely new substance with a new chemical formula?

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