(a) Define the term alloy. Write two advantages of making alloys.
(a) Define the term alloy. Write two advantages of making alloys.
(b) A metal 'X' which is used in thermite process, when heated with oxygen gives an oxide'Y which is amphoteric in nature. Identify X and Y. Write down balanced chemical equations of the reactions of oxide Y with HCI and NaOH.
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(a) Refer to the question No.
Advantages :
(i) to protect the metal from corrosion.
(ii) to improve the quality.
(b) X - Al; Y- Al2O3
Al2O3 + 6HCl → 2AlCl3 + 3H2O
Al2O3 + 2NaOH → 2NaAlO2 + H2
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