General Princip...

Impurities found in ores are called:

Which of the following is not a method of extraction of metals?

The composition of thermite mixture is :

(a) Roasting and calcination are the two processes to reduce the metal oxides to the respective metals.
(b) Magnesium is extracted from its ore by electrolytic reduction process.
(c) Cryolite is used in metallurgy of aluminium in order to increase the fusibility and conductivity
(d) I Hall's process bauxite is leached with the help of $${Na}_{2}{CO}_{3}$$.
Which of the following options regarding the above statements is correct?

Which of the following is used in making planes?

During electrolysis, electrons are being added directly to the metal ions at the ___________.

What will happen during roasting?

Metals more reactive than carbon are usually extracted by_________.

What is the most common type of electrometallurgical processes to obtain pure metal?

How do we separate two sulphide ores by froth floatation method?