Advertisements
Advertisements
Question
Write the name.
The process of strong heating of carbonate ores in insufficient air–
Solution
The process of strong heating of carbonate ores in insufficient air– Calcination
APPEARS IN
RELATED QUESTIONS
Name the most abundant metal in the earth's crust.
Which metal becomes black in the presence of hydrogen sulphide gas in air?
Name one metal which is extracted by reduction with aluminium.
Name the gas evolved when cinnabar ore is roasted.
Name two metals which are always found in combined state.
Name one ore of sodium. Name the sodium compound present in this ore and write its chemical formula.
State three objectives achieved during the roasting of ores.
Give the principles of the hydrolytic method.
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?
Define the term : Flux
Which method of refining is used to get 99.8% pure aluminium?
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 ______.
Calcium, copper, lead, aluminium, zinc, chromium, magnesium, iron.
Choose the major metals from the list given above to make the following alloys:
(a) Stainless steel
(b) brass
State the property of the metal being utilized in the following :
Use of metal | Property |
Zinc in Galvanization | |
Aluminium in Thermite welding |
Answer the following question :
What is the difference between calcination and roasting.
Identify who I am!
Ore of Aluminum- ______
Which of the statements about the reaction, \[\ce{ZnO + CO -> Zn + CO2}\] is correct?
Iqbal treated a lustrous, divalent element M with sodium hydroxide. He observed the formation of bubbles in reaction mixture. He made the same observations when this element was treated with hydrochloric acid. Suggest how can he identify the produced gas. Write chemical equations for both the reactions.
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
Give the reaction involved during extraction of zinc from its ore by
- roasting of zinc ore
- calcination of zinc ore