chemistry : class12 Tellurium mineral sources : Occurrence of Group 16 elements : p-Block Elements MCQ Questions and Answers
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Tellurium mineral sources
MCQ questions and answers.
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MCQ Questions
1. Tellurium is mainly found in nature in the form of which type of minerals?
A.
Tellurides
B.
Carbonates
C.
Nitrates
D.
Phosphates
Correct Answer:
Tellurides
Explanation:
Tellurium commonly occurs in nature as telluride minerals, in which it is combined with metals such as gold, silver, or lead.
2. Which mineral is an important natural source of tellurium and has the formula AuTe2?
A.
Hessite
B.
Calaverite
C.
Galena
D.
Chalcopyrite
Correct Answer:
Calaverite
Explanation:
Calaverite is gold telluride with the formula AuTe2 and is an important mineral source of tellurium.
3. Hessite, a mineral source of tellurium, is chemically known as:
A.
Ag2Te
B.
AuTe2
C.
PbS
D.
CuFeS2
Correct Answer:
Ag2Te
Explanation:
Hessite is silver telluride, represented by the formula Ag2Te, and serves as a source of tellurium.
4. Which mineral is primarily a silver telluride?
A.
Calaverite
B.
Hessite
C.
Sphalerite
D.
Cinnabar
Correct Answer:
Hessite
Explanation:
Hessite is a mineral composed mainly of silver telluride, Ag2Te.
5. Calaverite is best described as a:
A.
Gold telluride
B.
Silver sulfide
C.
Copper oxide
D.
Lead carbonate
Correct Answer:
Gold telluride
Explanation:
Calaverite is the gold telluride mineral AuTe2 and is one of the recognized mineral sources of tellurium.
6. Sylvanite is a mineral containing tellurium along with which two metals?
A.
Gold and silver
B.
Copper and zinc
C.
Iron and nickel
D.
Lead and tin
Correct Answer:
Gold and silver
Explanation:
Sylvanite is a gold-silver telluride mineral, commonly represented by the composition (Au,Ag)Te2.
7. Which formula represents a tellurium-bearing mineral?
A.
Ag2Te
B.
NaCl
C.
CaCO3
D.
Al2O3
Correct Answer:
Ag2Te
Explanation:
Ag2Te is the formula of hessite, a silver telluride and an important mineral source of tellurium.
8. Tellurium is often recovered as a by-product from ores of which metals because it occurs in their telluride minerals?
A.
Gold and silver
B.
Sodium and potassium
C.
Calcium and magnesium
D.
Aluminium and sodium
Correct Answer:
Gold and silver
Explanation:
Tellurium commonly occurs in tellurides of gold and silver, so it may be recovered during the processing of their ores.
9. Which of the following is NOT a tellurium mineral source?
A.
Calaverite
B.
Hessite
C.
Sylvanite
D.
Bauxite
Correct Answer:
Bauxite
Explanation:
Calaverite, hessite, and sylvanite are tellurium-bearing minerals, whereas bauxite is an aluminium ore and is not a tellurium mineral source.
10. The mineral sylvanite is commonly associated with which type of compound?
A.
Tellurides
B.
Chlorides
C.
Hydroxides
D.
Nitrides
Correct Answer:
Tellurides
Explanation:
Sylvanite is a gold-silver telluride, so it belongs to the group of telluride minerals that provide natural sources of tellurium.
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