Which of the following metals is found in nature as carnonate?

Options

A. Sr
B. Ca
C. B
D. Os

Answer

a

Explanation

The properties of metals influnce the kinds of ores in which they are found ,and the metallurgical processes used to exreact them form there ores. Metal sourse may be claccified broadly into five main types :
(i) Type -1 Metals are very ellectropositive matals (all alkali metals and Be) found as soluble salts e.g. chlorides,corbonetes ,sulphates ,etc. and as consitituents of alumina - silicate rocks .The metals are exetracted by electrolytic techniques .
(ii) Type - 2 Metals are the elecropositive alkaline earthmatals found principlipally as insolublecarbonets and sulphates ( megnasium sulphate is sioluble ) . They are also extracted by electrolisis .
(iii) Type - 3 Metals . The main sources of these metals `(BA_(L), Sc Y La,Ac)` are oxides and mixede oxides. A variety of method are used to exteracte these metals including electrolisis and camical reductuion with `C,CO` .and more reklative metals .
Type - 4 Metals such as `Fe,Co,Ni,Cu,Bi` etc .occur principally as sulphides , and kless frequently as oxides .The sulphides are almost always converated to oxides (Prior to reaction with `C,CO`and in some instances hydrogen ),or sulphates for subsequmt electrolytic treatmeent
Type - 5 Metal such as `Ru,Os,Rh,Ir` ,etc are uncreative metals and in the free state or as easily reduciblke componunds