2019
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Iron
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Mercury
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Copper
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Lead
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Detailed explanation-1: -2.13 Galena. Galena is the natural mineral form of lead sulfide (PbS).
Detailed explanation-2: -Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS). It is the most important ore of lead and an important source of silver.
Detailed explanation-3: -The typical specimen of galena is about 86.6% lead and 13.4% sulfur by weight. However, some specimens of galena contain up to a few percent silver by weight. They are called “argentiferous galena” because of their silver content.
Detailed explanation-4: -Galena is the most important lead ore mineral as well as an ore of silver, which is often found in the mineral. Galena mineral is often associated with sphalerite, calcite, pyrite, and fluorite. Silver is its most common compound, followed by copper and zinc, sometimes containing iron, arsenic, and bismuth.