sblock Elements - Result Question 66
Anhydrous $MgCl_2$ is obtained by heating the hydrated salt with ….
(1980, 1M)
True/False
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Answer:
Correct Answer: 19. dry $HCl$
Solution:
- Both reactions in their complete form are written below
(i) In acidic solution,
$\left[Fe^{2+}(CN){6}\right]^{4-}+H{2} \stackrel{-1}{2}O+2 H^{+} \longrightarrow\left[Fe^{3+}(CN){6}\right]^{3-}+2 H{2} \stackrel{-2}{O}$
(ii) In basic medium,
$$ \left[Fe^{3+}(CN){6}\right]^{3-}+H{2}O_{2}^{-1}+2 OH^{-} \longrightarrow \underset{ }{\left[Fe^{2+}(CN){6}\right]^{4-}+O{2}+2 H_{2}O} $$
Hence, $H_2O$ (for reaction (i)) and $O_2+H_2O$
(for reaction (ii)) are produced as by-product.
BETA
