Class 12 Chemistry Metallurgy General Principles and Processes of Isolation of Elements
Which of the following statements is incorrect ?
(a)
in d-block element the d-orbitals of the penultimate energy level of their atoms receive electron and thus give rise to three complete and one incomplete rows of the transition metals
(b)
Copper glance or chalcocyte and argentite both are sulphide ores
(c)
iron is extracted from its oxide ore siderite by reduction with carbon monoxide and coke in blast fumace
(d)
High melting and boiling points of transition elements are attributed to the involment of (n-1) d electrons in addition to the electrons
Correct answer: (c) 

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general principles and processes of isolation of elements
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general principles and processes of isolation of elements
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