Advertisements
Advertisements
Question
Right or wrong sentence?
In the electrolytic dissipation method of alumina, the lining of graphite acts as an anode.
Options
Right
Wrong
Advertisements
Solution
The given sentence is wrong.
Explanation:
In the electrolytic reduction of alumina (the Hall-Héroult process), the graphite lining of the steel tank acts as the cathode (the negative electrode). The anode (the positive electrode) consists of a separate set of graphite rods that are suspended into the molten electrolyte mixture.
APPEARS IN
RELATED QUESTIONS
Define the Ore.
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Write the composition of the alloy called bronze.
Why does a new aluminium vessel lose shine so soon after use?
Name one metal which is extracted by:
Reduction with carbon.
Describe with one example, how moderately reactive metals (which are in the middle of reactivity series) are extracted.
Name one ore of mercury. Which mercury compound is present in this ore? Write its chemical formula.
Which of the following pair of metals exists in their native state in nature?
Which metal can be extracted from the following ore?
Calamine
Give reasons, why aluminum is used in:
In making ships
Give the chemical formula of :
Bauxite
Define the term:
Slag
What is meant by concentration of ores?
How many valence electrons are present in non- metals?
Which one of the following is not true of metal :
Metals form non-polar covalent compounds
Name the following:
A steel grey coloured solid non-metal.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
_______ is the least reactive metal.
Explain concept with example/explain with the help of a balanced equation.
Roasting
Care must be taken while diluting concentrated nitric acid with water. Why?
