Chemistry Question Bank

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

Heating pyrites to remove sulphur is called

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

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)

Which of the following pair is incorrectly matched?

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

The liquation process is used for the purification of

In electrorefining of metals, the anode is made of

The anode mud in the electrolytic refining of silver contains:

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

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

Which of the following metals is refined by the van Arkel process?

The van Arkel method for purification of metals involves the conversion of the metal into a

Which method of purification is represented by the following equation? Ti+2I TiI Ti+2I K K -> ->

Impure nickel is purified by

Ultrapure silicon, used to make semiconductors, is obtained by the

In the equation, 4M+8CN– + 2H2O + O2-> 4 [M(CN)2]– + 4OH–, the metal M is

Which of the following is also known as “Fools gold”?

In the extraction of iron, Fe2O3 is reduced by

Blister copper is obtained in

The  pH  of  a  0.1  M  aqueous solution  of  a  weak  acid (HA) is 3. What is its degree of dissociation ?

A weak acid, HA has a Ka of 1.00 10 x . If 0.100 mole of this acid is dissolved in 1 L of water, the percentage of acid dissociated at equilibrium is closest to

The conjugate base of NH2 – is