Industrial method and most economic method to prepare aniline from nitrobenzene is
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a
b
c
d
answer is D.
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Detailed Solution
Fe+2HCl→FeCl2+2(H) FeCl2+2H2O→Fe(OH)2+2HClIn this method little HCl with scrap iron is enough because the FeCl2 formed gets hydrolysed to release (or) regenerate HCl.