In alumino-thermite process, Al metal acts as

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General Principles and processes of Isolation of Elements

medium

In the alumino-thermite process, $Al$ metal acts as

Oxidising agent

Reducing agent

Catalyst

Flux

Solution

Metal oxides having very high melting points, e.g. oxides of $Cr , Mn , Ti , Mo, Fe$ etc. are difficult to reduce by carbon reduction. These can be reduced by thermite reduction using $Al$ powder as reducing agent.

Alumino-thermite process: Certain Oxides of $Mn$, Cr do not reduce by carbon due to very high melting point. They are reduced by $Al$.

$Cr _2 O _3+2 Al \rightarrow 2 Cr + Al _2 O _3$

$3 Mn _3 O _4+8 Al \rightarrow 9 Mn +4 Al _2 O _3$

So $Al$ is used as reducing agent.

Standard 12

Chemistry

Consider the following statements :

Roasting is carried out to :

$(i)$ convert sulphide to oxide and sulphate

$(ii)$ remove water of hydration

$(iii)$ melt the ore

$(iv)$ remove arsenic and sulphur impurities

Of these statements :

medium

In the extraction of aluminium

process $X$ : applied for red bauxite to remove iron oxide (chief impurity)

process $Y$ : (Serpeck's process) : applied for white bauxite to remove $Z$ (chief impurity) then,

process $X$ and impurity $Z$ are

medium

A mineral is usually associated with a large amount of unwanted material called

easy

Carbon reduction process is not commerically applicable for which of the following set of oxides to extract the respective metal ?

$(I)\,\,\,\,\,ZnO\,\,\,\,\,(II)\,\,\,\,\, Fe_2O_3\,\,\,\,\, (III)\,\,\,\,\, Al_2O_3\,\,\,\,\,(IV)\,\,\,\,\,SnO_2\,\,\,\,\,(V)\,\,\,\,\,MgO$

medium

Given below are two statements:

Statement $I:$ During Electrolytic refining, the pure metal is made to act as anode and its impure metallic form is used as cathode.

Statement $II:$ During the Hall-Heroult electrolysis process, purified $Al _2 O _3$ is mixed with $Na _3 AlF _6$ to lower the melting point of the mixture.

In the light of the above statements, choose the most appropriate answer from the options given below:

medium

(JEE MAIN-2023)

In the alumino-thermite process, $Al$ metal acts as

Solution

Similar Questions

Consider the following statements : Roasting is carried out to : $(i)$ convert sulphide to oxide and sulphate $(ii)$ remove water of hydration $(iii)$ melt the ore $(iv)$ remove arsenic and sulphur impurities Of these statements :

In the extraction of aluminium process $X$ : applied for red bauxite to remove iron oxide (chief impurity) process $Y$ : (Serpeck's process) : applied for white bauxite to remove $Z$ (chief impurity) then, process $X$ and impurity $Z$ are

A mineral is usually associated with a large amount of unwanted material called

Carbon reduction process is not commerically applicable for which of the following set of oxides to extract the respective metal ? $(I)\,\,\,\,\,ZnO\,\,\,\,\,(II)\,\,\,\,\, Fe_2O_3\,\,\,\,\, (III)\,\,\,\,\, Al_2O_3\,\,\,\,\,(IV)\,\,\,\,\,SnO_2\,\,\,\,\,(V)\,\,\,\,\,MgO$

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Consider the following statements :

Roasting is carried out to :

$(i)$ convert sulphide to oxide and sulphate

$(ii)$ remove water of hydration

$(iii)$ melt the ore

$(iv)$ remove arsenic and sulphur impurities

Of these statements :

In the extraction of aluminium

process $X$ : applied for red bauxite to remove iron oxide (chief impurity)

process $Y$ : (Serpeck's process) : applied for white bauxite to remove $Z$ (chief impurity) then,

process $X$ and impurity $Z$ are

Carbon reduction process is not commerically applicable for which of the following set of oxides to extract the respective metal ?

$(I)\,\,\,\,\,ZnO\,\,\,\,\,(II)\,\,\,\,\, Fe_2O_3\,\,\,\,\, (III)\,\,\,\,\, Al_2O_3\,\,\,\,\,(IV)\,\,\,\,\,SnO_2\,\,\,\,\,(V)\,\,\,\,\,MgO$