Aluminium is used in thermite welding:

(a) What is thermit?

(b) What is ignition mixture?

(c) Write the reaction for this process?

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Solution

(a) A mixture of 3 parts of ferric oxide (Fe₂O₃) and one part of aluminium powder (Al).
(b) A mixture of Potassium chlorate and magnesium powder is the ignition mixture.
(c) Fe₂O₃ + 2Al → Al₂O₃ + 2Fe + heat

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Q. In thermite welding, magnesium ribbon is used to ignite the mixture.

Q. In thermite welding, to ignite the mixture we use :

${F e}_{2} O_{3}$ + $A l$ $\to$ $F e$ + ${A l}_{2} O_{3}$
This is the reaction used in thermite welding process. Calcium can also be used instead of aluminium in this process.

Q. Thermite mixture used for welding is:

Q. Assertion :Aluminium is use in thermite process. Reason: Aluminium has a high affinity for oxygen. It readily removes oxygen from oxides of less reactive metals so it is used in thermite welding.

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Aluminium is used in thermite welding: (a) What is thermit? (b) What is ignition mixture? (c) Write the reaction for this process?

(a) A mixture of 3 parts of ferric oxide (Fe2O3) and one part of aluminium powder (Al). (b) A mixture of Potassium chlorate and magnesium powder is the ignition mixture. (c) Fe2O3 + 2Al → Al2O3 + 2Fe + heat

Aluminium is used in thermite welding:

(a) What is thermit?

(b) What is ignition mixture?

(c) Write the reaction for this process?

(a) A mixture of 3 parts of ferric oxide (Fe₂O₃) and one part of aluminium powder (Al).
(b) A mixture of Potassium chlorate and magnesium powder is the ignition mixture.
(c) Fe₂O₃ + 2Al → Al₂O₃ + 2Fe + heat