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Question

Metals occur in the free state and in the combined state. Name two metals which occur in the free or native state. In the combined state metals occur in the form of compounds. Name two different metallic compounds in each case which occur as (i) halides (ii) oxides (iii) sulphides

Metallurgy

Chemistry, Class 10, ICSE, J Dalal

August 22, 2024

Answer

Gold and Platinum occur in the free metallic form.

The metallic compounds in the combined form are :

(i) halides – Cryolite [Na₃AlF₆], Fluorspar [CaF₂]

(ii) oxides – Bauxite [AlO₃.2H₂O]

(iii) sulphide – Iron Pyrite [FeS₂], Zinc blende [ZnS]

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