Question

which of the following set of properties talks about a compound?
I. made out of one or more atoms
II. joined through chemical process
III. composed of one or more substance
IV. mixtures of one or more different substances

A. I and II only
B. II. and III. only
C. III. and IV. only
D. I, II, III, IV

Answer 1

Answer:

$\huge\underline\blue{D}$

Answer 2

Answer:

A. I and II only

Explanation:

Any thing in the world is made of atoms so I is correct.

A compound is one to two elements combined chemically.

For example Ca and C and O might make CaCO${3}$ (Limestone)

So II is correct.

A compound is a pure substance for example H2O is made of H2O only.

So III is wrong

IV explains about a mixture so it is definitely wrong.

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