List I (Order of reaction) List II (Unit of rate constant) A. Zero order I. $mol^{-1} L s^{-1}$ B. First order II. $mol^{-2} L^2 s^{-1}$ C. Second order III. $s^{-1}$ D. Third order IV. $mol L^{-1} s^{-1}$
Choose the correct answer from the options given below :
A-IV, B-III, C-I, D-II
Zero order reaction → mol L⁻¹ s⁻¹
First order reaction → s⁻¹
Second order reaction → mol⁻¹ L s⁻¹
Third order reaction → mol⁻² L² s⁻¹
So the correct matching is :
A → IV
B → III
C → I
D → II
Consider the following reaction :
$2A (g) + B (g) \rightarrow 2D (g)$
$\Delta U^\ominus = -10 \text{ kJ mol}^{-1}$ and $\Delta S^\ominus = -44 \text{ J K}^{-1}$ at 298 K.
Identify the correct option with $\Delta G^\ominus$ for the reaction and spontaneity of the reaction at 298 K. (Given : $R = 8.31 \text{ J mol}^{-1} \text{K}^{-1}$)
Match List I with List II :
List I (Quantum Numbers ) $n$, $l$ | List II (Orbital) |
| A. 2, 1 | I. 3d |
| B. 4, 0 | II. 2p |
| C. 5, 3 | III. 4s |
| D. 3, 2 | IV. 5f |
Choose the correct answer from the options given below :
For a certain reaction R $\rightarrow$ Product, the plot of [R] vs time has a negative slope as shown. The order of reaction is :

At 298 K, a certain buffer solution contains equal concentrations of $X^{-}$ and $HX$. $K_b$ for $X^-$ is $10^{-10}$. What is the pH of this buffer solution ?