Question

Which one of the following does not occur as sulphide ore?
(a) Zn
(b) Cr
(c) Ag
(d) Fe

Answer 1

(b) Cr - Chromium is the correct answer.

All the other elements given in the option occur as sulphide ores.

Answer 2

Answer:

The correct option is (B) Chromium.

Explanation:

• Sulfide, also written sulphide, is a category of chemicals that contain sulphur and one or more metals.
• The majority of sulphides have straightforward structural characteristics, great crystallographic symmetry, and numerous metal-like characteristics, such as metallic luster and electrical conductivity.
• They frequently feature vivid colors, a low hardness, and a high specific gravity.
• Four of the six fundamental forms of structural arrangements found in nearly all sulphide minerals are significant. These close-packing mixtures of metal and sulphur are controlled by the ionic size and charge.
• Zn ore is found as zinc blends ZnS.
• Silver is found as silver glance Ag2S.
• Iron exists as iron pyrites FeS2.
• Mercury exists as mercuric sulphide HgS.
• But chromium does not exist as sulphide ore but it is in the from of chromite are i.e.,FeO.CrO3.

Correct option is (B).

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