Pure Substances and Mixtures; Separation of Mixtures — CHEMISTRY STD 6 — Question

Give an example of mixtures of two compounds

State two differences between an element and a compound.

Explain the term ‘cosmetics’ ‘talc’. Name a few main ingredients in cosmetics the role they play.

Draw a labelled diagram to show the change of state of water from solid-state to liquid state to the gaseous state starting from ice.

Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to existence

How will you prove experimentally that products of the combustion of a candle are: carbon dioxide gas
water vapour?

State the main steps to be taken to prevent water pollution.

Tabulate a comparative chart – to differentiate between elements, compounds, and mixtures. Differentiate them with reference to Separation of compound

Elements are classified into – Metals – Non-metals – Metalloids – Noble gases. State which of A, B, C, D is a –

1. Metallic element
2. Non-metallic element
3. Metalloid
4. Noble gas.

A: Is non-malleable, non-ductile & a poor conductor of electricity ___________
B: Has lustre, is malleable and ductile & a good conductor of heat ___________
C: Is unreactive and inert and present in traces in the air _________
D: Shows properties of both metals and non-metals ___________

With reference to the mixture of iron and sulphur, state the main characteristics of the mixture.