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 parallel plate capacitor with plate area \(A\) and plate separation \(d = 2\) m has a capacitance of \(4\mu F\). The new capacitance of the system if half of the space between them is filled with a dielectric material of dielectric constant \(K = 3\) (as shown in the figure) will be:
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\( ^2 \), \( \mu_s = 0.1 \)]
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 –