Question

III. Answer the following questions in one sentence. 1. What are the original substances that take part in a chemical reaction called? 2. Which type of change is usually not reversible?

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Answer 1

Answer:

) State which of the following pertain to - chemical changes.

(a) Substance retains its identity.

(b) The change is permanent.

(c) No new substance is formed.

(d) Is easily reversible.

(e) Produces one or more new substances by a change in its composition.

(f) The change is temporary.

(g) The composition and properties of the original substance are

The following changes are chemical -

(b) The change is permanent.

(e) Produces one or more new substances by a change in its composition.

(g) The composition and properties of the original substance are not altered.