Displacement Reactions

This video tutorial explains the reactivity series, including the addition of carbon, and how it helps predict chemical reactions. It covers displacement reactions with examples, such as zinc displacing copper, and highlights the historical context of metal discovery and smelting. The video emphasizes using the reactivity series to predict reactions and name products, without memorizing the list.

What is the main reason zinc can displace copper from copper oxide?

• Zinc has a higher melting point than copper.

• Zinc is a better conductor of electricity.

• Zinc is more reactive than copper.

• Zinc is heavier than copper.

Why does the reaction between copper and zinc oxide not occur?

• Copper is a non-metal.

• Copper and zinc oxide form a stable compound.

• Copper is more reactive than zinc.

• Copper is less reactive than zinc.

What is observed when iron powder is added to a copper sulfate solution?

• The solution becomes colorless.

• No visible change occurs.

• A red powder forms and the solution turns pale green.

• A blue powder forms.

What is the historical significance of carbon in metal extraction?

• Carbon was used to create alloys.

• Carbon was used to displace low-reactivity metals from ores.

• Carbon was used to increase the reactivity of metals.

• Carbon was used to cool down metals during extraction.

What is the process called when carbon is used to extract metals from their ores?

• Smelting

• Alloying

• Electrolysis

• Refining