There are very few pure elements or compounds around us. Most substances are mixtures. True or false?

Q. Most of the substances we see around us are
(a) pure elements.
(b) pure compounds.
(c) impure elements.
(d) mixtures.

Q. Are most substances around us pure substances or mixtures?

Q. A pure substance has a very sharp melting and boiling point. True or false?

Q. Assertion: Compounds are impure substances.
Reason: Substances containing two or more elements are considered pure.