How many different pairs of ${\mathrm{P}}_1$ and ${\mathrm{P}}_2$ locants are possible in the correct $\mathrm{IUPAC}$ names for the structures of

"${\mathrm{P}}_1-$methyl pent$-{\mathrm{P}}_2-$yne",

Where ${\mathrm{P}}_1 \& {\mathrm{P}}_2$ represents position of methyl & multiple bond respectively.

Total number of compound$\left(\mathrm{s}\right)$ among following which will evolve ${\mathrm{H}}_2(\uparrow )$ on reacting with $\mathrm{Na}-$metal is/are :

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$

Total number of compound$\left(\mathrm{s}\right)$ among following which will evolve ${\mathrm{H}}_2(\uparrow )$ on reacting with $\mathrm{Na}-$metal is/are :

${\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-\mathrm{H}$

Total number of compound$\left(\mathrm{s}\right)$ among following which will evolve ${\mathrm{H}}_2(\uparrow )$ on reacting with $\mathrm{Na}-$metal is/are :

${\mathrm{CH}}_3-\mathrm{CH}={\mathrm{CH}}_2, {\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_3, {\mathrm{CH}}_3-\mathrm{C}\equiv \mathrm{C}-{\mathrm{CH}}_3$

Total number of compound$\left(\mathrm{s}\right)$ among following which will evolve ${\mathrm{H}}_2(\uparrow )$ on reacting with $\mathrm{Na}-$metal is/are :

${\mathrm{CH}}_3-{\mathrm{CH}}_2-{\mathrm{CH}}_3$

How many $1,2$-shifts of carbocation intermediate are involved during the course of following reaction:

Find out total number of reagent.set of reagent used in the following conversion.

(1) ${\mathrm{H}}^{+}/\mathrm{\Delta }$

(2) conc. ${\mathrm{H}}_2{\mathrm{SO}}_4/\mathrm{\Delta }$

(3) ${\mathrm{H}}_3{\mathrm{PO}}_4/\mathrm{\Delta }$

(4) ${\mathrm{KHSO}}_4/\mathrm{\Delta }$

(5) ${\mathrm{Al}}_2{\mathrm{O}}_3/350°\mathrm{C}$

(6) ${\mathrm{PBr}}_3$

(7) ${\mathrm{SOCl}}_2$

Number of reagents that are used to convert $1$-Butyne into Butanal:

(a) $\underset{\left(2\right) {\mathrm{H}}_2{\mathrm{O}}_2/{\mathrm{OH}}^{-}}{\overset{\left(1\right) {\mathrm{BH}}_3.\mathrm{THF}}{\to }}$

(b) $\underset{\left(2\right) {\mathrm{NaBH}}_4}{\overset{\left(1\right) \mathrm{Hg}{\left(\mathrm{OAc}\right)}_2/\mathrm{THF}/{\mathrm{H}}_2\mathrm{O}}{\to }}$

(c) ${\mathrm{HgSO}}_4/\mathrm{dil}.{\mathrm{H}}_2{\mathrm{SO}}_4$

(d) ${\mathrm{O}}_3/\mathrm{Zn}$

(e) ${\mathrm{Br}}_2/{\mathrm{CCl}}_4$