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प्रश्न
Which one of the following is not true of metal :
Metal will have 1 or 2 or 3 electrons in their valence shell.
विकल्प
True
False
उत्तर
Metal will have 1 or 2 or 3 electrons in their valence shell.
- True
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संबंधित प्रश्न
Name one metal which is extracted by reduction with carbon.
Name two metals which are always found in combined state.
Some metallic oxides can be reduced by hydrogen, carbon and carbon monoxide and some cannot. Explain.
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 the chemical formula of :
Cryolite
How many valence electrons are present in non- metals?
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 : _______
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Explain concept with example/explain with the help of a balanced equation.
Roasting
