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Question (1)

QN0037621

Which statement best describes a mineral according to the chapter?

(A) A substance found only in metallic ores
(B) A naturally occurring homogeneous substance with a definable internal structure
(C) Any material extracted from a mine
(D) A substance formed only in sedimentary rocks

Correct Answer: B

Explanation:

A mineral is a naturally occurring homogeneous substance with a definable internal structure.

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Question (2)

QN0037622

A rock may contain:

(A) Only one type of mineral
(B) Only metallic minerals
(C) A combination of several minerals
(D) Only non-metallic minerals

Correct Answer: C

Explanation:

Rocks are combinations of minerals.

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Question (3)

QN0037623

Why do minerals show wide variation in their properties?

(A) They are all formed at the same temperature
(B) Their formation depends on different geological processes and conditions
(C) They are found only on the surface
(D) They contain identical chemical compositions

Correct Answer: B

Explanation:

Minerals vary because they form through different geological processes and under different conditions.

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Question (4)

QN0037624

When is a mineral deposit considered an ore?

(A) When it is found in a mountain
(B) When it contains only metallic minerals
(C) When its concentration is sufficient for commercial extraction
(D) When it is found near a river

Correct Answer: C

Explanation:

A mineral becomes an ore when its concentration is sufficient for commercial extraction and processing.

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Question (5)

QN0037625

A mining deposit contains 80 units of mineral. If only 50 units can be extracted economically, what percentage is economically viable?

(A) 50%
(B) 62.5%
(C) 80%
(D) 37.5%

Correct Answer: B

Explanation:

Economically viable percentage = (50/80) × 100 = 62.5%.

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Question (6)

QN0037626

Veins and lodes are generally found in:

(A) Loose alluvial deposits
(B) Cracks, crevices and faults of igneous and metamorphic rocks
(C) Ocean water
(D) Residual soil only

Correct Answer: B

Explanation:

Veins and lodes occur in cracks, crevices, faults and joints of igneous and metamorphic rocks.

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Question (7)

QN0037627

Minerals such as coal and some forms of iron ore generally occur in:

(A) Placer deposits
(B) Ocean beds
(C) Sedimentary rock layers
(D) Residual soil

Correct Answer: C

Explanation:

Coal and some forms of iron ore occur in layers or beds in sedimentary rocks.

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Question (8)

QN0037628

Bauxite deposits are mainly formed through:

(A) Decomposition of surface rocks and removal of soluble constituents
(B) Cooling of magma
(C) Deposition of river sand
(D) Accumulation of sea water

Correct Answer: A

Explanation:

Bauxite forms through the decomposition of rocks and removal of soluble constituents.

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Question (9)

QN0037629

Which group contains minerals commonly found in placer deposits?

(A) Coal, petroleum and natural gas
(B) Gold, silver, tin and platinum
(C) Limestone, mica and bauxite
(D) Copper, manganese and coal

Correct Answer: B

Explanation:

Placer deposits commonly contain valuable minerals such as gold, silver, tin and platinum.

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Question (10)

QN0037630

Which combination represents minerals obtained from ocean waters?

(A) Coal, petroleum and mica
(B) Common salt, magnesium and bromine
(C) Iron, manganese and bauxite
(D) Copper, limestone and coal

Correct Answer: B

Explanation:

Ocean waters provide common salt, magnesium and bromine, while ocean beds contain manganese nodules.

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Question (1)

Which statement best describes a mineral according to the chapter?

Explanation:

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Question (2)

A rock may contain:

Explanation:

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Question (3)

Why do minerals show wide variation in their properties?

Explanation:

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Question (4)

When is a mineral deposit considered an ore?

Explanation:

Link:

Question (5)

A mining deposit contains 80 units of mineral. If only 50 units can be extracted economically, what percentage is economically viable?

Explanation:

Link:

Question (6)

Veins and lodes are generally found in:

Explanation:

Link:

Question (7)

Minerals such as coal and some forms of iron ore generally occur in:

Explanation:

Link:

Question (8)

Bauxite deposits are mainly formed through:

Explanation:

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Question (9)

Which group contains minerals commonly found in placer deposits?

Explanation:

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Question (10)

Which combination represents minerals obtained from ocean waters?

Explanation:

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