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प्रश्न
Name the following:
The compound formed by the reaction between calcium oxide and silica.
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उत्तर
Calcium silicate (slag)
संबंधित प्रश्न
Name the following:
A metal oxide that can be reduced by hydrogen.
Give appropriate scientific reasons for Zinc oxide can be reduced to zinc metal by using
carbon, but aluminium oxide cannot be reduced by a reducing agent
Write a balanced chemical equation for each of the following reactions :
(i) Reduction of copper (II) oxide by hydrogen
For the reaction of a metal oxide. Suggest a reducing agent other than carbon
Name a non-metallic element which forms acidic and neutral oxides
Name a non-metallic element which is a liquid at ordinary temperatures
Name a non-metallic element which is a conductor of electricity.
4 tones of bauxite, 150 Kg of sodium hydroxide and 600 Kg of graphite.
The aluminium compound in bauxite is aluminium oxide and the main impurity is iron (II) oxide. Aluminium is obtained by the electrolysis of aluminium oxide dissolved in cryolite.
(a) When bauxite is treated with sodium hydroxide solution, what happens to:
(i) the aluminium oxide?
(ii) The iron (III) oxide?
Give the equations for the reduction of copper oxide.
The following sketch represents the electroplating of an Iron cup with Nickel metal.
Study the diagram and answer the following questions:
- During electroplating, the iron cup is placed at the cathode. Why?
- Name the ion that must be present in the electrolyte.
- State one condition that is necessary to ensure that the deposit is smooth, firm and even.
- Write the reaction taking place at the cathode.
- What change would you observe at the anode?
