Chemistry Question Bank

Certain metals can be obtained in the ultrapure state by heating with iodine and then decomposing the metal iodide at a much higher temperature. This method is known as

The distillation process (under reduced pressure) is used for the purification of

The anode mud in the electrolytic refining of silver contains:

In electrorefining of metals, the anode is made of

The liquation process is used for the purification of

The zone-refining process for purification of metals is based on

Which of the following pair is incorrectly matched?

Which of the following reactions represents the self- reduction process? (a) (b) (c)

Thomas slag is

Which of the following reactions represents the self- reduction process? (a) (b) (c)

Out of the following metals that cannot be obtained by electrolysis of the aqueous solution of their salts is

Heating pyrites to remove sulphur is called

Which of the following metals cannot be extracted by the carbon reduction process?

Heating with carbon in absence of air is known as :

Chemical leaching is useful in the concentration of:

Wolframite (FeWO4), present as an impurity in cassiterite (SnO2), can be removed by the process of

In the froth-floatation process, the sulphide ores are concentrated by mixing the ore with

In the froth-floatation process, the ore particles float because

Sulphide ores are generally concentrated by the

Concentration of ores is not done by the

Silicon is the main constituent of

The ore of calcium which contains phosphorus is

The metal which mainly occurs as oxide ore in nature is:

Among the following, the most abundant metal in the earth’s crust is

The impurities present in a mineral are called