NEET Solved Paper 2017 Question 27
Question: In which pair of ions both the species contain S-S bond?
Options:
A) $ S _4O_6^{2-},S _2O_7^{2-} $
B) $ S _2O_7^{2-},S _2O_3^{2-} $
C) $ S _4O_6^{2-},S _2O_3^{2-} $
D) $ S _2O_7^{2-},S _2O_8^{2-} $
Show Answer
Answer:
Correct Answer: C
Solution:
$ [X] = \left( K_{eq} [X^2] \right)^{\frac{1}{2}} \quad \text{…..(ii)} $
Now, substitute the value of [X] from equation (ii) in equation (i), we get
$ \begin{aligned} \text{Rate} , (r) &= K_1 \times \left( K_{eq} \right)^{\frac{1}{2}} [X^2]^{\frac{1}{2}} [Y^2] \ &= K [X^2]^{\frac{1}{2}} [Y^2] \end{aligned}$
Therefore, the order of reaction is $\frac{1}{2} + 1 = \frac{3}{2} = 1.5 $
