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Chemistry
: General Principles and Processes of Isolation of Elements
हाथ से चुनने वाली एकाग्रता के लिए कौन सा परिदृश्य सबसे अच्छा है? , Which of the scenarios is best for hand-picking concentration?
Which of the scenarios is best for hand-picking concentration?
A.
When the ores are good conductors of electricity
जब अयस्क विद्युत के सुचालक होते हैं
B.
When the impurities can be distinguished from the ore by the naked eye
जब नग्न आंखों से अशुद्धियों को अयस्क से अलग किया जा सकता है
C.
When either the ore or the impurities are magnetic
जब या तो अयस्क या अशुद्धियाँ चुंबकीय होती हैं
D.
When the ore particles are heavier than the impurities
जब अयस्क के कण अशुद्धियों से भारी होते हैं
Solution
B. When the impurities can be distinguished from the ore by the naked eye
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