is a mixture.
Further explanation:
Mixture:
It is formed by the physical combination of two or more different substances. Mixtures do not have any fixed formula and their composition is also variable. There is retention in the properties of constituents even after the formation of mixtures.
(1)
Bromine is present in liquid in its pure state. The “<em>l</em>” written in the parenthesis after denotes its physical state which is the same as that of its pure form. So it is not a mixture.
(2) K (s)
Potassium is present in solid in its pure form. The “<em>s</em>” written in the parenthesis after K describes its physical state which is the same as that of its pure form. So it is not a mixture.
(3) KBr (s)
It is an ionic salt which is solid in nature. The “<em>s</em>” written in the parenthesis after KBr denotes its physical state which is the same as that of its pure form. So it is not a mixture.
(4) KBr (aq)
The “<em>aq</em>” written in the parenthesis after KBr indicates that it is present in the aqueous phase. This means it is formed by the combination of KBr and water so it is a mixture.
Learn more:
- The major contribution of Antoine Lavoisier to chemistry: brainly.com/question/2500879
- Example of physical change: brainly.com/question/1119909
Answer details:
Grade: High School
Chapter: Elements, compounds, and mixtures
Subject: Chemistry
Keywords: mixture, physical combination, substances, fixed formula, variable, composition, retention, properties, Br2, K, KBr.