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प्रश्न
Bauxite reacts with sodium hydroxide in the Bayer’s process.
विकल्प
Right
Wrong
उत्तर
Bauxite reacts with sodium hydroxide in the Bayer’s process- Right
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संबंधित प्रश्न
Silver metal does not combine easily with oxygen but silver jewellery tarnishes after some time. How?
Name three other metals which are extracted in a manner similar to sodium.
How is copper extracted from its sulphide ore (copper glance), Cu2S? Explain with equations of the reactions involved.
The major ore of aluminium is known as:
(a) cinnabar
(b) calamine
(c) bauxite
(d) pyrolusite
State why aluminium is extracted from its oxide by electrolysis while copper, lead, iron by reducing agents and mercury and silver by thermal decomposition.
Give reasons, why aluminum is used in:
In aluminiothermy
Aluminum is used in thermite welding:
what is thermit?
Answer the following questions based on the extraction of aluminium from alumina by Hall - Heroult’s Process :
What is the function of cryolite used along with alumina as the electrolyte?
Compare the process of calcination and roasting.
Which method of refining is used to get 99.8% pure aluminium?
Explain the following:
Galvanization protects iron from rusting.
Write equations for each of the above metal which reacts with water.
X is an element in the form of a powder. X burns in oxygen and the product is soluble in water. The solution is tested with litmus. Write down only the word which will correctly complete each of the following sentences:
(a) If X is a metal, then the litmus will turn ______.
(b) If X is a non-metal, then the litmus will turn ______.
(c) If X is a reactive metal, then ______ will be evolved, when X reacts with dilute sulphuric acid.
(d) If X is a non -metal, it will form _ oxide, which will form ______ solution with water.
(e) If X is a non -metal, it will not conduct electricity unless it is carbon in the form of ______.
choose the most appropriate term to match the given description.
Heating of the ore in the absence of air to high temperature
Name the following:
A steel grey coloured solid non-metal.
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.
The process of strong heating of carbonate ores in insufficient air–
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Explain in brief electrolytic reduction of alumina with a neat labelled diagram.
Explain the difference between Bayer’s process and Hall’s process by explaining the Bayer’s process.
