Electrolysis

Choose all the inert electrodes:

• iron

• nickel

• graphite

• platinum

The electrolytic deposition of a superior metal on a baser metal is:

• electro-refining

• electro-plating

• electro-metallurgy

• electrolysis

Which of the following are strong electrolytes?

• NH₄OH

• HBr

• HI

• Mg(OH)₂

In the process of electrolysis, the ions are discharged as ______ _____ at the respective electrodes.

Ions discharged in electrolysis depends on the factor:

• relative electrode potential

• concentration of ions

• relative electrode charge

• density of electrolyte

The passage of electricity through an electrolyte causes the metallic ions to migrate towards the _______ and the non-metallic ions to migrate towards the _______. (use and in between to separate the answers)

Which is the correct electrochemical series?

• Na, Al, Fe, Mg, Zn

• Mg, Fe, Zn, Na, Al

• Na, Mg, Al, Zn, Fe

• Fe, Zn, Na, Mg, Al

The preferential discharge of ions present in an electrolyte at the respective electrodes is also known as: (type all in lowercase)

Choose all the correct reasons for electroplating:

• Improves the electrical conductivity of the article.

• Prevents corrosion or rusting of the base metal.

• Makes the article dull.

• Makes the article attractive.

During electroplating an article with silver, the electrolyte used is:

• silver nitrate solution

• silver cyanide solution

• sodium argentocyanide solution

• nickel sulphate solution