Tag: metals and non metals

Quizzes (11) Questions (18)

Questions Related to metals and non metals

Multiple choice chemistry metals and non metals refining of metals basics of metallurgy basic metallurgical processes

Electrolysis is used for refining certain metals such as copper and zinc.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Electrolysis, process by which electric current is passed through a substance to effect a chemical change. The chemical change is one in which the substance loses or gains an electron (oxidation or reduction).

It is extensively used in metallurgical processes, such as in extraction (electrowinning) or purification (electrorefining) of metals from ores or compounds and in deposition of metals from solution (electroplating). Electrolysis of salt of copper and zinc results in the deposition of pure copper and zinc on cathode of the electrolytic cell.
option A is correct

Multiple choice chemistry metals and non metals refining of metals basics of metallurgy basic metallurgical processes

In the electrolytic refining of a metal M, what would you take as the anode is : 

  1. impure metal M

  2. thin strip of pure metal M

  3. solution of salt of the metal M

  4. none of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The purest copper is obtained by an electrolytic process using impure copper as the anode and a thin sheet of pure copper as cathode. The electrolyte is an acidic solution of copper sulphate. By passing electricity copper is dissolved from anode and deposits at cathode.

Multiple choice chemistry metals and non metals refining of metals basics of metallurgy basic metallurgical processes

On the basis of following features identify the correct option:
I. This metal is not obtained in free state.
II. This metal is obtained by electrolysis of their chlorides in molten state.

  1. $Na$
  2. $Ca$

  3. both (1) and (2)

  4. neither (1) nor (2)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Both Sodium and calcium are highly reactive metal oxides are not reduced by carbon and these metals are obtained in free state by electrolytic reduction of their molten chloride salts.

Multiple choice chemistry metals and non metals refining of metals basics of metallurgy basic metallurgical processes

In electrolytic refining, which one is the anode and which is cathode?

  1. Pure metal is the anode and impure metal is cathode

  2. Impure metal is made anode and pure metal cathode

  3. Both can be done interchangeably

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In electrolytic refining, impure metal is made the anode and a thin strip of pure metal is made the cathode.

Multiple choice chemistry metals and non metals refining of metals basics of metallurgy basic metallurgical processes

Impurities present at anode are deposited at the bottom and called as _______.

  1. anode dust

  2. anode particulate

  3. anode mud

  4. anode impurities
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

In the electrolytic refining the process the impure sample is used as anode and pure metal is obtained at cathode. Impurities present at anode are deposited at the bottom and called as anode mud.