मराठी

An Element L Consists of Molecules. When L is Heated with Iron Metal, It Forms a Compound Fel. What Chemical Term Would You Use to Describe the Change Undergone by L?

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प्रश्न

An element L consists of molecules.

When L is heated with iron metal, it forms a compound FeL. What chemical term would you use to describe the change undergone by L?

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उत्तर

When L is heated with iron metal, it forms a compound FeL

Here, oxidation of Fe and reduction of L occur as follows:

Fe → Fe2+ + 2e-

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2014-2015 (March) Science Paper 2

संबंधित प्रश्‍न

How is the following metallic oxide reduced? Write the equation:

Zinc oxide


Name oxide of one metal which is reduced by (give equation): Reduction with heat alone


Name a non-metallic element which has a metallic lustre


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 :
A metal oxide that can be reduced by hydrogen


Answer the following question with respect by hydrogen : Identify the components of the electrolyte other than pure alumina and the role played by each.


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 ________


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.


Name two metallic oxides which cannot be reduced by carbon, carbon monoxide or hydrogen.


Give the equation for the reduction of Zinc oxide.


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