TS EAMCET Medical 2016 Paper

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Question : 139 of 160
 
Marks: +1, -0
The following reaction indicates the presence of which element ?
Sodium fusion extract
i)‌boil‌with‌F‌e‌S‌O4
→
ii)‌acidification‌with‌conc.H2SO4
Fe4[Fe(CN)6]3.XH2O
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