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What is the name of the purification process used for metals with a low melting point?
Which of the following metals cannot be extracted by self-reduction?
What was the basic idea behind keeping the elements in groups of a periodic table?
Which of the following sets of elements has the same valency?
Calcination is the process in which heating of ore takes place in-
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Tags :NDA & Other Exams
Jan 31NDA & Other Exams