- A

- ✓$HCHO\xrightarrow{{450{}^oC}}{H_2} + CO$
- C$MeCHO\xrightarrow[\Delta ]{{KOH}}MeCOOK + MeC{H_2}OH$
- D$PhCHO + HCHO\xrightarrow[\Delta ]{{NaOH}}PhCOONa + C{H_3}OH$

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
$\begin{array}{|l|l|l|l|} \hline & Column\,I & & Column\,II \\ & (Reduction\,process) & & (Charge\,required) \\ \hline (a) & 1\,mol\,of\,MnO_4^-\,to\,Mn^{2+} & (p) & 193000\,\,C \\ \hline (b) & 1\,\,mole\,of\,Cr_2O_7^{2-}\,to\,Cr^{3+} & (q) & 289500\,\,C \\ \hline (c) & 1\,\,mole\,of\,Sn^{4+}\,to\,Sn^{2+} & (r) & 482500\,\,C \\ \hline (d) & 1\,mole\,of\,Al^{3+}\,to\,Al & (s) & 579000\,\,C \\ \hline \end{array}$

Which response contains all the correct statement about this process ?
$(1)$ Dehydration $(2)\, E_2$ mechanism
$(3)$ Carbon skeleton migration $(4)$ Most stable alkene will form
$(5)$ Single-step reaction
The total number of possible products formed by tertiary carbocation of $A$ is $.........$.
