What are the Types of Pure Substances?

Explain pure substance with examples.

Separate the following into elements, mixtures and compounds – lemonade, rocks, copper, diamond, salt, neon gas, salad, pure water, aluminium, silver, soap, blood, carbon dioxide, sodium.

Which of the following is not a pure substance.

Sugar is.

Oxygen is.

Heterogeneous mixture is

Homogeneous mixture is:

What is common salt – element, compound or mixture? Explain.

We get a white powder when we burn magnesium ribbon in the air. Is this powder an element or a compound? Give reasons for your answer.

Group the following substances into elements or compounds: potassium, lime water, sulphur, washing soda, carbon, lead, vinegar.