Question

Which phrase describes a compound that consists of two elements?

(1) a mixture in which the elements are in a variable proportion
(2) a mixture in which the elements are in a fixed proportion
(3) a substance in which the elements are chemically combined in a variable proportion
(4) a substance in which the elements are chemically combined in a fixed proportion

Answer 1

2) a mixture of variables

Answer 2

Answer: Option D

Explanation:

Compound is made of more than one type of elements that is chemically combined in a fixed proportion.

Compounds are made of more than one type of elements. The elements of the compound are hold together by chemical bonds.

Two same elements does not forms any bond in the compound so different elements are required to form a bond.

hence, the correct answer is option D