Question

Complexes formed in the following methods are
I. Mond’s process for purification of nickel.
II. Removal of lead poisoning from the body.
III. Cyanide process for extraction of silver.
IV. Froth flotation process for separation of

ZnS

from galena ore by using depressant.

Accepted Answer

$\begin{array}{*{20}{c}} I&{II}&{III}&{IV}\ {Ni{{(CO)}_4}}&{{{\left[ {Pb(EDTA)} ight]}^{2 - }}}&{{{\left[ {Ag{{(CN)}_2}} ight]}^ - }}&{{{\left[ {Zn{{(CN)}_4}} ight]}^{2 - }}} \end{array}$

Answer

$\begin{array}{*{20}{c}} I&{II}&{III}&{IV}\ {Ni{{(CO)}_4}}&{{{\left[ {Pb(EDTA)} ight]}^{2 - }}}&{{{\left[ {Ag{{(CN)}_2}} ight]}^ - }}&{\left[ {Zn{{(CN)}_2}} ight]} \end{array}$

Answer

$\begin{array}{*{20}{c}} I&{II}&{III}&{IV}\ {Ni{{(CO)}_6}}&{{{\left[ {Pb(EDTA)} ight]}^{4 - }}}&{{{\left[ {Ag{{(CN)}_2}} ight]}^ - }}&{{{\left[ {Zn{{(CN)}_6}} ight]}^{4 - }}} \end{array}$

Answer

$\begin{array}{*{20}{c}} I&{II}&{III}&{IV}\ {Ni{{(CO)}_4}}&{{{\left[ {Pb(EDTA)} ight]}^{2 - }}}&{{{\left[ {Ag{{(CN)}_4}} ight]}^{3 - }}}&{{{\left[ {Zn{{(CN)}_4}} ight]}^{2 - }}} \end{array}$

JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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