Alcohols with molecular formula $$\mathrm{C}_n \mathrm{H}_{2 n+2} \mathrm{O}$$ are isomeric with

$$7.8 \mathrm{~g}$$ of a compound having molecular formula $$\mathrm{C}_6 \mathrm{H}_6$$, on reacting with $$\mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3$$ gives $$8.4 \mathrm{~g}$$ of a product which has molecular formula $$\mathrm{C}_8 \mathrm{H}_8 \mathrm{O}$$. Calculate the percentage yield of the product $$\mathrm{C}_8 \mathrm{H}_8 \mathrm{O}$$. (Given, atomic weights of $$\mathrm{H}, \mathrm{C}$$ and $$\mathrm{O}$$ respectively are 1, 12 and 16)

Arrange the following bases in decreasing order of basicity.

1. Aniline

2. o-nitroaniline

3. m-nitroaniline

4. p-nitroaniline

The complete combustion of one mole of benzene produces .......... grams of carbon dioxide.