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प्रश्न
What chemical process is used for obtaining a metal from its oxide?
उत्तर १
A metal can be extracted from its oxide by the process of reduction.
\[\ce{2HgO_{(s)} ->[\Delta] 2Hg_{(l)} + O2_{(g)}}\]
उत्तर २
Reduction is the chemical process used for obtaining a metal from its oxide by using reducing agents like carbon, sodium, aluminium or calcium.
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संबंधित प्रश्न
Write the steps involved in the extraction of pure metals in the middle of the activity series from their carbonate ores.
Name the most abundant metal in the earth's crust.
Name one metal which is extracted by reduction with heat alone.
Fill in the following blank with suitable word:
The non-metal present in steel is ............
How are the less reactive metals (which are quite low in the reactivity series) extracted? Explain with the help of an example.
Define the terms gangue.
Which metal is extracted from calamine ore?
Which of the following is an ore of mercury metal?
(a) rock salt
(b) cinnabar
(c) calamine
(d) haematite
Give reasons, why aluminum is used in:
making alloys
Define the term : Gangue
Complete the incomplete statement with missing word:
Non-metals form acidic oxides while metals form ______.
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 ______.
State the property of the metal being utilized in the following :
| Use of metal | Property |
| Zinc in Galvanization | |
| Aluminium in Thermite welding |
Choose the correct answer from the options given below:
The metal is a liquid at room temperature.
Define calcination.
Answer the following question:
Carbon cannot reduce the oxides of sodium, magnesium, and aluminum to their respective metals. Why? Where are these metals placed in the reactivity series? How are these metals obtained from their ores? Take an example to explain the process of extraction along with chemical equations.
Sulphide ores : Roasting : : Carbonate ores : _______
Mercury, silver, gold are highly reactive metals.
Which of the following metals exist in their native state in nature?
(i) Cu
(ii) Au
(iii) Zn
(iv) Ag
A mineral from which the metal can be extracted economically and conveniently is known as ______.
