Question:
Which one of the following statements about a compound is NOT correct?
Which one of the following statements about a compound is NOT correct?
Options:
- a) A compound is a substance composed of two or more elements chemically combined in a fixed proportion.
- b) Properties of a compound are different from its constituent elements.
- c) A compound is an impure substance.
- d) The constituents of a compound can be separated only by chemical or electrochemical reactions.
- a) A compound is a substance composed of two or more elements chemically combined in a fixed proportion.
- b) Properties of a compound are different from its constituent elements.
- c) A compound is an impure substance.
- d) The constituents of a compound can be separated only by chemical or electrochemical reactions.
correct answer : c)
Explanation:
A compound is a pure substance, not an impure substance. Statement (c) is incorrect.
A compound is a pure substance, not an impure substance. Statement (c) is incorrect.