| List-$I$ | List-$II$ |
|---|---|
| $(i)$ Explosive | $(A)$ $NaN_3$ |
| $(ii)$ Artificial gem | $(B)$ $Fe_3O_4$ |
| $(iii)$ Self reduction | $(C)$ $Sn$ |
| $(iv)$ Magnetic material | $(D)$ $Al_2O_3$ |
| $(E)$ $Pb(N_3)_2$ | |
| $(F)$ $Fe_2O_3$ | |
| $(G)$ $Cu$ | |
| $(H)$ $SiC$ |
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| 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 |
| List-$I$ (Property) | List-$II$ (Element/compound) |
| $I$. Explosive | $A$. $Cu$ |
| $II$. Self-reduction | $B$. $Fe_3O_4$ |
| $III$. Magnetic material | $C$. $Cu(CH_3COO)_2 \cdot Cu(OH)_2$ |
| $IV$. Verdigris | $D$. $Pb(NO_3)_2$ |
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