Class 10 Chemistry Exam MCQs – Practice Test 12 (Chapter 5)

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Chemical Industries MCQs – Practice Test 12 PDF Download

MCQ 56: Ore of mercury is called:

galena
zinc blende
cinnabar
chromite

MCQ 57: Ore of copper is called:

hematite
chalcopyrite
bauxite
halite

MCQ 58: Number of carbon atoms per molecule in fuel oil is:

14 to 20
20 to 50
50 to 70
70 to 90

MCQ 59: The process of converting minerals into oxides is called:

smelting
reigning
roasting
Bessemerization

MCQ 60: A solid deposit containing a sufficiently high percentage of a mineral to make extraction of metal economically feasible is called:

metal oxide
gangue
ore
none of above

Chemical Industries Exam Prep – Class 10 Chemistry Notes App & e-Book

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