Displacement Reactions and Electrochemistry

The video tutorial introduces electrochemistry, focusing on reactivity and its relation to the periodic table. It explains the reactivity of metals, particularly noble metals, and discusses displacement reactions with practical examples, such as the reaction between zinc and copper. The tutorial concludes with a preview of the next lesson on reduction potentials.

What is the main focus of electrochemistry?

• Study of chemical reactions involving light absorption

• Study of chemical reactions involving electron transfer

• Study of chemical reactions involving sound waves

• Study of chemical reactions involving heat transfer

Which side of the periodic table contains more electropositive elements?

• Left

• Right

• Bottom

• Top

What characteristic is associated with noble metals?

• Low melting point

• High reactivity

• Low reactivity

• High melting point

Which of the following metals is considered a noble metal?

• Gold

• Zinc

• Iron

• Aluminum

In a displacement reaction, which metal displaces the other?

• Both metals displace each other equally

• The less reactive metal displaces the more reactive metal

• The more reactive metal displaces the less reactive metal

• Metals do not displace each other

What happens to a metal when it undergoes oxidation?

• It gains protons

• It gains electrons

• It loses protons

• It loses electrons

Which metal will displace copper in a displacement reaction?

• Zinc

• Gold

• Silver

• Mercury

What is the result of a displacement reaction involving zinc and copper sulfate?

• Zinc sulfate and copper metal

• Copper sulfate and zinc metal

• Zinc oxide and copper metal

• Copper oxide and zinc metal

What happens to the color of the solution when copper is displaced by zinc?

• It becomes more blue

• It becomes less blue

• It becomes green

• It becomes red

Why does a copper bar not displace zinc in a zinc sulfate solution?

• Copper does not react with zinc sulfate

• Copper and zinc have the same reactivity

• Copper is less reactive than zinc

• Copper is more reactive than zinc