Consider the following reaction :

If % yield of reaction is x, tvalue of x /10 is (nearest integer)

The correct answer is 8.

Step-by-step Explanation:

From the reaction shown in the image, aniline reacts with acetic anhydride in the presence of pyridine (Py) to yield acetanilide as product 'P'.
The given masses in the reaction scheme are:
Mass of reactant aniline = 9.3 g
Mass of product 'P' (acetanilide) obtained = 11 g

Step 1: Calculate the molar mass of aniline ($C_6{H}_{5}N{H}_2$)
Molar mass of aniline = $(6\times 12)+(7\times 1)+14=93\text{g/mol}$

Step 2: Calculate the number of moles of aniline
$\text{Moles of aniline}=\frac{9.3\text{g}}{93\text{g/mol}}=0.1\text{mol}$

Step 3: Calculate the molar mass of acetanilide 'P' ($C_8{H}_{9}NO$)
Molar mass of acetanilide = $(8\times 12)+(9\times 1)+14+16=135\text{g/mol}$

Step 4: Calculate the theoretical yield of acetanilide
According to the balanced chemical equation, 1 mole of aniline reacts to yield 1 mole of acetanilide.
Therefore, theoretical moles of acetanilide = 0.1 mol.
$\text{Theoretical yield of acetanilide}=0.1\text{mol}\times 135\text{g/mol}=13.5\text{g}$

Step 5: Calculate the percentage yield (x) of the reaction
$x=\frac{\text{Actual yield}}{\text{Theoretical yield}}$
$x=\frac{11}{13.5}\times 100\approx 81.48\%$

Step 6: Calculate the value of x / 10
$\frac{x}{10}=\frac{81.48}{10}=8.148$

Rounding to the nearest integer, we get:
$\frac{x}{10}\approx 8$