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JEE Main 201910 AprilMorning Shift
Exam
JEE Main
Year
2019
Date
10 April
Shift
Morning Shift
Subject
Chemistry
Chapter
General Principles and Processes of Isolation of Metals

JEE Main 2019 · 10 April · Morning Shift · Chemistry · General Principles and Processes of Isolation of Metals

Match the refining methods (Column I) with metals (Column II)....

Match the refining methods (Column I) with metals (Column II).
Column I Column II
(Refining methods) (Metals)
(I) Liquation (a) ZrZr
(II) Zone Refining (b) NiNi
(III) Mond Process (c) SnSn
(IV) Van Arkel Method (d) GaGa

Options

  1. A(I)−(b);(II)−(c);(III)−(d);(IV)−(a)( I ) - ( b ) ; ( II ) - ( c ) ; ( III ) - ( d ) ; ( IV ) - ( a )
  2. B(I)−(b);(II)−(d);(III)−(a);(IV)−(c)( I ) - ( b ) ; ( II ) - ( d ) ; ( III ) - ( a ) ; ( IV ) - ( c )
  3. C(I)−(c);(II)−(d);(III)−(b);(IV)−(a)\left(I\right) - \left(c\right); \left(II\right) - \left(d\right); \left(III\right) - \left(b\right); \left(IV\right) - \left(a\right)
  4. D(I)−(c);(II)−(a);(III)−(b);(IV)−(d)\left(I\right) - ( c ) ; \left(II\right) - \left(a\right); ( III ) - \left(b\right); \left(IV\right) - ( d )

Correct answer

C. (I)−(c);(II)−(d);(III)−(b);(IV)−(a)\left(I\right) - \left(c\right); \left(II\right) - \left(d\right); \left(III\right) - \left(b\right); \left(IV\right) - \left(a\right)

Step-by-step solution

Liquation is used to purify the metal whose melting point is lower than that of impurities like Sn,Bi,PbSn, Bi, Pb etc.
Mond’s process The impure nickle is heated in presence of carbon monoxide.

Ni(s)+CO(g)→[Ni(CO)4](g)→Ni(s)+4CO(g){Ni}_{\left(s\right)} + {CO}_{\left(g\right)} \to {\left[Ni{\left(CO\right)}_{4}\right]}_{\left(g\right)} \to {Ni}_{\left(s\right)} + 4{CO}_{\left(g\right)}
Zone refining is based on the principle that impurities are more soluble in melt that in the pure solid metal. The metals like Ga,GeGa, Ge etc. are purified by this method.
Van Arkell method is used for those metals which are very difficult to obtain in pure state like ZrZr.

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