Match the following:
List-$I$List-$II$
$A. Al_2O_3 + 2NaOH + 3H_2O \rightarrow 2Na[Al(OH)_4]$$I. \text{Roasting}$
$B. Ni(CO)_4 \xrightarrow{230^{\circ}C} Ni + 4CO$$II. \text{Calcination}$
$C. Fe_2O_3 \cdot 3H_2O \xrightarrow{\Delta} Fe_2O_3 + 3H_2O$$III. \text{Vapour phase refining}$
$D. 2PbS + 3O_2 \rightarrow 2PbO + 2SO_2$$IV. \text{Electrolysis}$
$V. \text{Leaching}$

The correct answer is:

  • A
    $A-V, B-III, C-II, D-I$
  • B
    $A-II, B-III, C-IV, D-V$
  • C
    $A-IV, B-III, C-II, D-I$
  • D
    $A-I, B-III, C-IV, D-II$

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Similar Questions

Match Column-$I$ with Column-$II$.
Column-$I$ Column-$II$
$P$. Nitriding $I$. Process of heating steel to redness and then cooling it very slowly
$Q$. Annealing $II$. Process of heating steel in presence of $NH_3$ and producing hard coating of Iron Nitride on the surface of steel
$R$. Tempering $III$. Process of heating steel to redness and then cooling it suddenly by plunging it into water or oil
$S$. Quenching $IV$. Process of heating quenched steel to a temperature well below redness and then cooling it slowly

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