How many of the following on reductive ozonolysis will give only glyoxal?

$1,3$-butadiene, ethylene, acetylene, o-xylene, m-xylene, p-xylene, benzene, cyclobutadiene, cyclooctatetraene.

How many of the following species are aromatic in nature?

Cyclopentadienyl cation, cyclopentadienyl anion, tropylium cation, azulene, cyclopropenyl cation, tetrahydrofuran, cyclooctatetraene, furan, cycloheptatriene.

Enter the correct numerical value, (in decimal-notation, rounded-off to the second decimal place, e.g.$6.25, 7.00, -0.33, -0.30, 30.27$).

In the following reaction sequence, the amount of $\mathrm{D}$ (in g) formed with $10$ moles of acetic acid is _____. (Report your answer to the nearest integer)

(The yield ($\%$) corresponding to the product in each step is given in the parenthesis)

${\mathrm{CH}}_3\mathrm{COOH}\stackrel{\mathrm{NaOH}}{\to }\underset{90\%}{\mathrm{A}}\underset{630 \mathrm{K}}{\overset{\mathrm{Soda} \mathrm{lime}}{\to }}\underset{70\%}{\mathrm{B}}\stackrel{{\mathrm{Cl}}_2,\mathrm{h\nu }}{\to }\underset{80\%}{\mathrm{C}}\stackrel{\mathrm{Na},\mathrm{Dry} \mathrm{ether}}{\to }\underset{70\%}{\mathrm{D}}$