Metallurgy

Which of the following method is used to convert ore into oxide?

Which one of the following is not the purpose of full annealing?

The process of heating some solid material or a substance in a controlled environment.and it is done to bring about some change in the substance physical or chemical constitution. These process is known as?  

The highly reactive metals such as Sodium, Potassium, Magnesium, and others are removed by which of the following?

The metal that is most prevalent in the earth's crust is ?

What is the name of the process of extraction of metals from their ores?

Which of the following processes is used to purify lead?

Which of the following is not an impurity generally present in crude metals?

Choose the correct statements from the following:

A) Miller Process is not used for the purification of Lead.

B) Wohlwill process is used for the refining of Gold.

C) Bessemer process was used for the production of steel from molten pig iron.

D) Calaverite and Sylvanite are ores of Zinc.

Miller and Wohlwill process are used for refining of which of the following metal?

Which of the following method is not used in the refining of Lead?

Choose the correct statements from the following:

A) Calcination is defined as the process of converting ore into an oxide by heating it strongly either in presence of air or in a high supply. 

B) Roasting is a process of converted ore into its oxide by heating it above its melting point in the absence of air.

C) Bauxite is an ore of Aluminium.

Which of the following method is used for the desilverization of lead?