Metals and their Extractions

Presentation

•

Science

•

9th Grade

•

Medium

•

NGSS

MS-PS1-2, HS-PS2-5

Standards-aligned

Karen Cymru

Used 1+ times

FREE Resource

8 Slides • 17 Questions

Multiple Choice

In which region would the most reactive elements be found?

Multiple Choice

Why is the reactivity series important in the extraction of metals from their ores?

It helps determine the method used for extraction

It shows the color of metals

It predicts the melting point of metals

It tells us the cost of extraction

Multiple Choice

Arrange the metals W, X, Y and Z in increasing order of reactivity.

X, W, Y, Z

X, Y, W, Z

Z, Y, W, X

W, Z, Y, X

Multiple Choice

A copper penny turning greenish after a few years is an example of ...

Chemical Change

Physical Change

Multiple Choice

Which best describes the reactivity of metals when moving from left to right on the periodic table?

They become less reactive.

They become more reactive.

Multiple Choice

The most reactive metals are colored :

Orange

Red

Blue

Green

Multiple Choice

Which of the following statements best explains why aluminium is extracted by electrolysis rather than by reduction with carbon?

Aluminium is less reactive than carbon

Aluminium is more reactive than carbon

Aluminium forms alloys with carbon

Aluminium cannot conduct electricity

Multiple Choice

What particle carries the charge in the electrolyte?

electron

proton

ion

atom

Multiple Choice

The diagram shows the electrolysis of lead(II) bromide using inert electrodes. Why does the bulb only light up when the lead(II) bromide is melted?

Bromine atoms in lead(II) bromide are converted to ions when it is melted

Electrons flow through the lead(II) bromide when it is melted

The ions in lead(II) bromide are acting as the mobile charge carriers when it is melted

There are no ions in solid lead(II) bromide

Open Ended

Explain why the positive electrode in the industrial electrolysis of aluminium needs to be replaced often.

Type response here

Multiple Select

Diagram shows the electrolysis of concentrated copper(II) chloride solution using carbon as electrodes.

Which of the followings is the correct half equations represents the reactions at the anode?

4OH^- → 2H₂O + O₂ + 4e

2Cl^- → Cl₂ + 2e

Cu → Cu²⁺ + 2e

Cu²⁺ + 2e → Cu

Fill in the Blanks

Multiple Select

Which of the following are correct statements about the products formed at the electrodes during the electrolysis of molten lead bromide?

Lead forms at the cathode

Bromine forms at the anode

Lead forms at the anode

Bromine forms at the cathode

Multiple Choice

Which property is shared by most transition metals?

Low melting points

Form coloured compounds

Poor conductors of electricity

Very reactive

Multiple Choice

Pb + 2Ag⁺ → Pb⁺² + 2Ag

The chemical species being reduced is

Pb⁺²

Ag⁺

Fill in the Blanks

Multiple Choice

In a redox reaction, the species that loses electrons

is called the cathode

is oxidized

gains mass at the electrode

decreases in oxidation number

In which region would the most reactive elements be found?

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