Which of the following compounds does not produce a green-coloured product on thermal decomposition?

Assign $A, B, C, D$ from the given type of reaction.
$CuSO_4 + 2KI \longrightarrow CuI \downarrow + \frac{1}{2} I_2 + K_2SO_4$

Assign $A, B, C, D$ from the given type of reaction.
$Na_2[Zn(OH)_4] + 4HCl \longrightarrow ZnCl_2 + 2NaCl + 4H_2O$

The sodium salt of an organic acid $'X'$ produces effervescence with conc. $H_2SO_4$. $'X'$ reacts with an acidified aqueous $CaCl_2$ solution to give a white precipitate which decolourises an acidic solution of $KMnO_4$. $'X'$ is:

$H_2S$ ($5$ moles) reacts completely with acidified aqueous potassium permanganate solution. In this reaction,the number of moles of water produced is $x$,and the number of moles of electrons involved is $y$. The value of $(x+y)$ is. . . . . .

In the following reactions $(i)$ $MnO_2 + 4 HCl \rightarrow$ and $(ii)$ $2 KMnO_4 + 16 HCl \rightarrow$,the number of moles of chlorine gas released respectively are