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Home
Class 12
CHEMISTRY
In the aluminothermite process, aluminiu...

In the aluminothermite process, aluminium is

A

An oxidising agent

B

A flux

C

A reducing agent

D

A solder

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Text Solution

Verified by Experts

The correct Answer is:
C
A mixture of concentrated oxide ore and aluminium powder, commonly called hermite, is taken in a steel crucible placed in a bed of sand.
`Cr_(2)O_(3) + 2 Al rarr 2Cr + Al_(2)O_(3)`
`3Mn_(3)O_(4) + 8 Al rarr 9 Mn + 4 Al_(2)O_(3)`.
A large amount of heat energy is released during reduction, which fuses both the alumina and the metal. Aluminium acts as a reducing agent and is itself oxidised.
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Consider the following statements and arrange in the order of true/false as given in the codes. ltBRgt S_(1) : In the aluminothermite process, aluminium acts as reducing agent. S_(2) : Amongst the following metals Mg and Al can not be obtained by the electrolysis of the aqueous solution of their salt. (I) Ag (II) Mg (III) Cu (IV) Al S_(3) : In teh extractive metallurgy of zinc, partial fusion of ZnO with coke is called sintering and reduction of ore to the molten metal is called smelting. S_(4) : Extractive metallurgyu of silver from its ore argentite involves complex formation and displacement by more electropsitive metal.

Consider the following statements and arrange in the order of true/false as given in the codes. ltBRgt S_(1) : In the aluminothermite process, aluminium acts as reducing agent. S_(2) : Amongst the following metals Mg and Al can not be obtained by the electrolysis of the aqueous solution of their salt. (I) Ag (II) Mg (III) Cu (IV) Al S_(3) : In teh extractive metallurgy of zinc, partial fusion of ZnO with coke is called sintering and reduction of ore to the molten metal is called smelting. S_(4) : Extractive metallurgyu of silver from its ore argentite involves complex formation and displacement by more electropsitive metal.

Knowledge Check

  • In the aluminothermite process, aluminium acts as

    A
    an oxidising agent
    B
    a flux
    C
    a reducing agent
    D
    a solder.

  • Consider the following statements and arrange in the order of true/false as given in the codes. S_1 :In the aluminothermite process, aluminium acts as a reducing agent. S_2 :The process of extraction of gold involves the formation of [Au(CN)_4] and [Zn(CN)_4]^(2-) S_3 :In the extractive metallurgy of zinc, partial fusion of ZnO with coke is called sintering and reduction of ore to the molten metal is called smelling.

    A
    T F F
    B
    TTT
    C
    TTF
    D
    TFT

  • Consider the following statements - In the aluminothermite process, aluminium acts as reducing agent. The process of extraction of gold involves the formation of [Au(CN)_2 ]^(-) and [Zn(CN)_4 ]^(2-) In the extractive metallurgy of zinc, partial fusion of ZnO with coke is called sintering and reduction of ore to the molten metal is called smelting. Extractive metallurgy of silver from its ore argentite involves complex formation and displacement by more electropositive metal. Choose the correct options -

    A
    A and B
    B
    B and C
    C
    A, B and C
    D
    A, B, C and D

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