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प्रश्न
Write the observation for the following:
A paper dipped in potassium permanganate solution is put on the mouth of a test tube containing sulphur dioxide gas.
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उत्तर
Purple colour of potassium permanganate gets discharged.
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संबंधित प्रश्न
How is the following metallic oxide reduced? Write equations:
Iron (ll) oxide
Name oxide of one metal which is reduced by (give equation): Electrolytic reduction
For the reaction of a metal oxide. Suggest a reducing agent other than carbon
Name a non-metallic element which has a metallic lustre
Name a non-metallic element which is a liquid at ordinary temperatures
Write balanced equation for the following reaction:
Reduction of copper oxide by hydrogen.
In order to obtain one tone of aluminium, the following inputs are required:
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.
(i) Write the formula of cryolite.
(ii) Write down the word which correctly completes the following sentence.
"By dissolving aluminium oxide in cryolite, a ______ (conducting / non- conducting) solution is produced.
(iii) Why so much graphite required for this electrolytic process.
(iv) Write the equation for the reaction which takes place at cathode.
Name the following:
The compound formed by the reaction between calcium oxide and silica.
Write a balanced equation for the reduction of copper (ll) oxide by hydrogen.
Give the equation for the reduction of Iron (III) oxide.
