If mixture of ores contain Cassiterite, Zinc blende, Argentite, Haematite, `FeWO_(4)` Chromite, Dolomite, Find the number of ores which is/are collected in container(B).

An ore which does not contain oxygen is

Which ore contains both iron and copper ?

Which ore contains both iron and copper ?

Zinc blende is which ore of zinc

Which ore contains both Cu and Fe?

Consider the following ores Siderite ,Iron Pyrites, Haematite, Malachite,Cuprite, Copper glance, Sphalerite, Calamine, Zincite. Out of the above ores, "x" is the number of ores in which oxidation number of metal is "1. The value of "4x" is