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:
) 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.
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