Question

identify whether the given substance mixture or compound and justify your answer
a, sand and water
b, concrete
c, water and oil
d, Co2​

Answer 1

Options a, b, and c are classified as mixtures, Option d is classified as a compound.

• A compound is defined as the combination of two or more elements using a chemical process. The Formation of a compound happens when a chemical reaction occurs between two or more elements.
• A mixture is defined as a physical mixing of two or more elements. The mixtures can be separated using physical methods like heating, distillation, etc.

a) sand and water

• Sand and water are considered as a mixture because it can be separated easily using the filtration process. ( Sand gets settled in the filter paper whereas water can be collected which passes through the filter paper).

b) Concrete

• Concrete is a mixture of sand, cement, and water. It can be separated easily. Hence, it is considered a mixture.

c) Water and oil

• Water and oil can be separated using a separating funnel, water and oil always form different layers so, it is easy to separate them using the separating funnel.

d) CO2 (Carbon Dioxide)

• Carbon Dioxide is a chemical reaction where two oxygen atoms react with a single Carbon atom forming CO2. It is a chemical reaction hence, it is a compound.

Therefore, Options a,b, and c are mixtures and option d is a compound.