Question

According to Maxwell's distribution of molecular speeds, for the below graph drawn for two different samples of gases $A$ and $B$ at temperature $T_1$ and $T_2$ respectively, which of the following statements is/are INCORRECT :

• A. If $T_1=T_2$, then molecular mass of gas $B\left(M_B\right)$ is greater than molecular mass of gas $A\left(M_A\right)$.
• B. If molecular mass of gas $A\left(M_A\right)$ is equal to molecular mass of gas $B\left(M_B\right),$ then $T_1>T_2$
• C. If $T_1<T_2,$ then molecular mass of gas $B\left(M_B\right)$ is necessarily less than molecular mass of gas $A\left(M_A\right)$.
• D. All of these

Answer 1

Answer: (D)

At constant temperature, decrease in molecular mass causes flattening of the graph. For same molecular mass of gas, increase in temperature causes flattening of the graph. $\left(V_{mp}\right)T_1<\left(V_{mp}\right)T_2$