Advertisements
Advertisements
प्रश्न
Find the odd one out and give its explanation.
पर्याय
Zinc coating
Tinning
Electroplating
Calcination
Advertisements
उत्तर
Calcination
Explanation-
Calcination is a process involved in extraction of carbonate ores while others are methods used for prevention of corrosion.
APPEARS IN
संबंधित प्रश्न
Define the Ore.
Explain why, an aqueous solution of sodium chloride is not used for the electrolytic extraction of sodium metal.
Which metal is extracted from bauxite ore?
Which metal can be extracted from the following ore?
bauxite
Aluminum is used in thermite welding:
what is ignition mixture?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
Name the electrode, from which aluminium collected.
How many valence electrons are present in non- metals?
Name a non- metal that has a metallic luster and sublimes on heating.
State three objectives achieved during the roasting of ores.
Name the process used for the enrichment of sulphide ore.
How is the method of extraction of metals high up in the reactivity series different from that for metals in the middle? Why can the same process not be applied for them? Name the process used for the extraction of these metals.
If Cu, Fe, Zn, Al elements are arranged in increasing order of their reactivity then the correct order would be which of the following?
Write the name.
Strongly heating carbonate ores in insufficient air -
Gold and silver are active metals.
Explain the concept of Roasting.
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Explain the following reaction with the balanced equation.
Dry aluminium hydroxide is ignited at 1000 °C
Electrical wires have a coating of an insulting material. The material, generally used is
- Given below are the steps for extraction of copper from its ore. Write the reaction involved.
- Roasting of copper (I) sulphide
- Reduction of copper (I) oxide with copper (I) sulphide.
- Electrolytic refining
- Draw a neat and well labelled diagram for electrolytic refining of copper
Care must be taken while diluting concentrated nitric acid with water. Why?
