Question

Three experiments are running in separate vessels, following 1$^{st}$ order kinetics.
Experiment-(A) 100 ml, 10 M
Experiment-(B) 200 ml, 10 M
Experiment-(C) 100 ml, 10 M + 100 ml H$_2$O
Select correct order of rate of reaction in above experiments.

• A. A = B = C
• B. A>B>C
• C. A>B>C
• D. A>B = C

Hint:

In 1$^{st}$ order reactions, the rate is directly proportional to the concentration of the reactant, so a higher concentration results in a faster reaction.

Answer 1

The Correct Option is B

Step 1: Identify Halogen. Violet color in the organic layer (CHCl$_3$) indicates the presence of **Iodine**.
Step 2: Carius Method Calculation. Mass of Organic Compound ($W$) = 0.15 g. Mass of AgI formed ($w$) = 0.12 g. Atomic mass I = 127. Molar mass AgI = 108 + 127 = 235. \[ \% \text{I} = \frac{\text{Atomic Mass I}}{\text{Molar Mass AgI}} \times \frac{\text{Mass AgI}}{\text{Mass Compound}} \times 100 \] \[ \% \text{I} = \frac{127}{235} \times \frac{0.12}{0.15} \times 100 \] \[ \% \text{I} = 0.5404 \times 0.8 \times 100 \approx 43.23\% \] Conclusion: Option (1).