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प्रश्न
Steel is an alloy of iron and ______.
पर्याय
Nickel
Zinc
Carbon
Aluminium
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उत्तर
Steel is an alloy of iron and Carbon.
संबंधित प्रश्न
Name the following:
A metal oxide that can be reduced by hydrogen.
Complete the following by selecting the correct option from the choices given:
The metal whose oxide, which is amphoteric, is reduced to metal by carbon reduction ____________. (Fe/Mg/Pb/Al)
Explain with reason:
In the electrolytic reduction of alumina, the graphite anode is gradually consumed.
Give reason for the following:
Carbon anodes are used in the electrolytic extraction of aluminium.
Give equation for the following conversion: Aluminium to aluminium nitride.
Name a non-metallic element which is a conductor of electricity.
Answer the following question with respect by hydrogen : Identify the components of the electrolyte other than pure alumina and the role played by each.
- 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.
Give the equations for the reduction of Lead (II) 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?
