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प्रश्न
Write the composition of the alloy called bronze.
उत्तर
The composition of bronze is copper (90%) and tin (10%). This alloy of copper is strong and prevents corrosion.
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संबंधित प्रश्न
Name one metal which is extracted by reduction with heat alone.
A metal which exists as a liquid at room temperature is obtained by heating its sulphide ore in the presence of air.
(a) Name the metal and write its chemical symbol.
(b) Write the name and formula of the sulphide ore.
(c) Give the equations of chemical reactions involved in the production of metal from its sulphide ore.
(d) Name a common device in which this metal is used.
(e) Can this metal displace copper from copper sulphate solution? Why?
Name the following:
The substance added to get rid of gangue in the extraction of metal.
Explain the following:
Galvanization protects iron from rusting.
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
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.
Iron is _______.
Explain the following reaction with the balanced equation.
Sodium aluminate reacts with water
Explain the following reaction with the balanced equation.
Zinc carbonate is heated strongly in limited supply of air
Why should the metal sulphides and carbonates be converted to metal oxides in the process of extraction of metal from them?
