Maxwell–Boltzmann Distribution

Q.

The diagram shows the Maxwell’s speed distribution curves for a certain ideal gas at two different temperature $T_1$ and $T_2$. Pick the correct options:
Take $R=\frac{1}{12}\text{L atm/molK}$

1. At 400 K, most probable speed is 800 m/s
2. At 400 K, rms speed is 1000 m/s
3. $T_2=600K$
4. $M=5g/mol$

Q. Analyze the generalized rate data for the reaction
$RX+N{u}^{-}⟶$ Nucleophilic Product

$\begin{array}{cccc}\text{S. No.}& \text{[RX]Substrate}& \text{[Nu] Attacking species}& \text{Rate of reaction}\left(M{s}^{-1}\right)\\ 1.& 0.10M& 0.10M& 1.2\times {10}^{-4}\\ 2.& 0.20M& 0.10M& 2.4\times {10}^{-4}\\ 3.& 0.10M& 0.20M& 2.4\times {10}^{-4}\\ 4.& 0.20M& 0.20M& 4.8\times {10}^{-4}\end{array}$
Which of the following is the most appropriate potential energy v/s reaction coordinate diagram of the reaction on the basis of above data analysis?

1. 
2. 
3. 
4.