| List I | List II | ||
| A | Nitration mixture | I | Acid flux |
| B | Thermite mixture | II | Mordant |
| C | Silica | III | \[\text{F}{{\text{e}}_{\text{2}}}{{\text{O}}_{\text{3}}}\](3 pars) + Al powder (1 part) |
| D | Alum | IV | Conc. \[\text{HN}{{\text{O}}_{3}}+\]Conc. \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\] |
| V | Conc. \[\text{HN}{{\text{O}}_{\text{3}}}\text{+}\]Conc. \[\text{HCl}\] | ||
A) A-I B-III C-IV D-II
B) A-I B-II C-IV D-III
C) A-I B-IV C-III D-II
D) A-V B-I C-IV D-III
Correct Answer: A
Solution :
(a) In the presence of \[\text{conc}{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\text{,}\,\text{cnoc}\,\text{HN}{{\text{O}}_{3}}\] acts as a nitrating reagent. (b) Thermite is a mixture of \[\text{F}{{\text{e}}_{\text{2}}}{{\text{O}}_{_{\text{3}}}}\] (3 parts) and Al powder (1 part). (c) Silica is an acid flux which is used to remove basic impurities present in an ore. \[\underset{\text{acid}\,\text{flux}}{\mathop{Si{{O}_{2}}}}\,+\underset{\text{basicimpurity}}{\mathop{FeO}}\,\xrightarrow{{}}\underset{\text{slag}}{\mathop{FeSi{{O}_{3}}}}\,\] (d) Alum is used as an mordant in purification of water. It coagulates dust particles present in the water. \[C{{H}_{4}}+N{{H}_{3}}\xrightarrow[A{{l}_{2}}{{O}_{3}}]{1000{{\,}^{o}}C}HCN+3{{H}_{2}}\uparrow \] \[CH\equiv CH+{{H}_{2}}O\xrightarrow[6{{\,}^{o}}C]{40%\,{{H}_{2}}S{{O}_{4}},1%HgS{{O}_{4}}}\] \[C{{H}_{3}}CHO\] \[{{C}_{2}}{{H}_{4}}\xrightarrow{Conc.{{H}_{2}}S{{O}_{4}}}{{C}_{2}}{{H}_{5}}HS{{O}_{4}}\xrightarrow[\begin{smallmatrix} +{{H}_{2}}O \\ -{{H}_{2}}S{{O}_{4}} \end{smallmatrix}]{80{{\,}^{o}}C}\]\[{{C}_{2}}{{H}_{5}}OH\] \[{{C}_{2}}{{H}_{6}}\xrightarrow[450{{\,}^{o}}C]{\Delta }{{C}_{2}}{{H}_{4}}+{{H}_{2}}\]
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