The metal refined by Van Arkel method is
Ni
Zr
Cu
Sn
The metal refined by the Van Arkel method is Zr (Zirconium).
The Van Arkel method, also known as the iodide process, is a technique used for the purification of certain metals, including zirconium. In this method, the metal is converted into a volatile metal iodide, which is then decomposed to obtain pure metal. The Van Arkel method is commonly used for the purification and production of high-purity zirconium metal.
A block of mass 1 kg is pushed up a surface inclined to horizontal at an angle of \( 60^\circ \) by a force of 10 N parallel to the inclined surface. When the block is pushed up by 10 m along the inclined surface, the work done against frictional force is:
[Given: \( g = 10 \) m/s\( ^2 \), \( \mu_s = 0.1 \)]
A gas can be taken from A to B via two different processes ACB and ADB. When path ACB is used, \( 60 J \) of heat flows into the system and \( 30 J \) of work is done by the system. If path ADB is used, the work done by the system is \( 10 J \). The heat flow into the system in path ADB is:
Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.
Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore.
Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –