Chemistry
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
28 Likes
Answer
Gold and Platinum occur in the free metallic form.
The metallic compounds in combined form are :
(i) halides — Cryolite[Na3AlF6], Fluorspar[CaF2]
(ii) oxides — Bauxite[AlO3.2H2O]
(iii) sulphide — Iron Pyrite[FeS2], Zinc blende[ZnS]
Answered By
15 Likes
Related Questions
Name the following elements :
(i) A trivalent metal used to make light tools.
(ii) A monovalent non-metal present in fluorspar.
State how the physical and chemical property differences between metals and non-metals are related to their basic atomic structure.
Define a metal with particular emphasis on :
(i) ionization
(ii) valency
(iii) formation of oxides.
State the position [group] in the periodic table to which the following metals belong :
(i) Na – alkali metal
(ii) Mg – alkaline earth metal
(iii) Fe and Zn transition elements
(iv) inner transition elements (metals)
(v) Al – post transition element.
Differentiate between
(i) mineral & ore
(ii) matrix & flux.
Give the (i) common (ii) chemical name (iii) formula of two common ores each of aluminium, zinc and iron.