II. True or False: Write True if the statement is correct and False if the statement is wrong.

1. A mixture is composed of substances in
fixed amount.

2. A substance is always homogeneous.

3. Melting points and boiling points of a
substance is definite.

4. Mixtures are physically combined
structures that cannot be separated into their
original components.

5. A substance cannot be separated by
ordinary physical means.
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