Advertisements
Advertisements
Question
Zinc sulphide : Roasting : : zinc carbonate : _______
Advertisements
Solution
Zinc sulphide : Roasting : : zinc carbonate : calcination
APPEARS IN
RELATED QUESTIONS
Define the Ore.
Name two metals which are found in nature in the free state.
Silver metal does not combine easily with oxygen but silver jewellery tarnishes after some time. How?
Name one metal which is extracted by:
Reduction with aluminium.
Name two metals which are found in nature mainly in the free state (as metallic elements).
Which of the following is an ore of mercury metal?
During galvanisation, iron metal is given a thin coating of one of the following metals. This metal is:
When an object made of metal A is kept in air for a considerable time, it loses its shine and becomes almost black due to the formation of a layer of substance B. When an object made of another metal C is kept in damp air for a considerable time, it gets covered with a green layer of substance D. Metal A is the best conductor of electricity whereas metal C is the next best conductor of electricity.
- What is metal А?
- What is metal C?
- Name the substance B.
- Name the substance D.
- What type of chemical can be used to remove the green layer from metal C and clean it? Why?
Which metal can be extracted from the following ore?
Calamine
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?
Name the ore of mercury. With the help of balanced chemical equations, explain the process of extraction of mercury from its ore.
Define the term:
Slag
What is meant by concentration of ores?
What is meant by refining of metals?
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 ______.
Draw a well-labelled diagram of extraction of Aluminium. Write the anode reaction in electrolytic reduction of Alumina.
Write the name.
The molecular formula of main ore of aluminium -
Explain concept with example/explain with the help of a balanced equation.
Ionic bond and ionic compounds
Which of the following ore is concentrated by the Froth floatation process?
