2. Electrochemistry — Chemistry STD 12 Science — Question

$\mathop {(A)}\limits_{ gives\,\,positive ~\\ iodoform\,Test }  \xrightarrow[\begin{subarray}{l} (ii)\,{H^ + },{H_2}O +  ~\\ (iii)\,conc.\,{H_2}S{O_4}/\Delta \end{subarray} ]{{{\text{(i) C}}{{\text{H}}_{\text{3}}}{\text{MgBr}}}}(B)\xrightarrow{{{O_3}/Zn,{H_2}O}}$

Vapours $(B)+$ $\xrightarrow{{{K_2}{S_2}{O_8}}}\,(C)\, + \,(D)$

$(D)\,\xrightarrow{{(B)}}$  Brown $(E)$

Hybridisation of central atom in $(E)$ is

$C_2H_4O(g) \longrightarrow CH_4(g) + CO(g)$ If the initial pressure of $C_2H_4O(g)$ is $80\, mm$ and total pressure at the end of $20\, minutes$ is $120\, mm$ ............ $\min$