Question

a change is said to be a chemical change when : (a)energy change occur (b)new substances are formed (c)the change cannot be easily reversed (d)all statements are correct​

Answer 1

Answer:

all statements are correct

Answer 2

Answer:

A change is said to be a chemical change when energy change occurs, new substances are formed, and the change cannot be easily reversed i.e.all statements are correct​(d).

Explanation:

The characteristic of chemical changes are as follows:-

• Chemical changes occur when the molecular makeup is totally changed and a new product is created.
• New products are created via chemical modifications.
• Chemical alterations are both permanent and irreversible.
• Energy changes occur when a chemical reaction takes place. The formation of new bonds in products and the destruction of old ones in reactants involve different amounts of energy.

So, the correct answer among the given options is (d) all statements are correct​.

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