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प्रश्न
Give reason for the following:
Carbon anodes are used in the electrolytic extraction of aluminium.
उत्तर
Carbon anodes are used in the electrolytic extraction of aluminium because carbon in the form of graphite is a good conductor of electricity.
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संबंधित प्रश्न
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
Explain with reason:
In the electrolytic reduction of alumina, the graphite anode is gradually consumed.
Give equation for the following conversion: Aluminium hydroxide to aluminium oxide.
Give equation for the following conversion: Aluminium to aluminium nitride.
Give equation for the following conversion:Aluminium to sodium aluminate.
Write balanced equation for the following reaction:
Reduction of lead (II) oxide by carbon.
- A to F below relate to the source and extraction of either zinc or aluminium:
- Bauxite
- Coke
- Cryolite
- Froth floatation
- Sodium hydroxide solution
- Zinc blende
- Write down the three letters each from the above list which are relevant to
- Zinc
- Aluminium
- Fill in the blanks using the most appropriate words from A to F.
- The ore from which aluminium is extracted must first be treated with ………………. so that pure aluminium oxide can be obtained.
- Pure aluminium oxide is dissolved in ….. to make a conducting solution.
iii. Write the formula of cryolite.
Steel is an alloy of iron and ______.
Give the equation for the reduction of Iron (III) oxide.
Give the equation for the reduction of Zinc oxide.
