When dilute aqueous solutions of two salts are mixed, the process is associated with

Answer: Option B

According to the first law of thermodynamics
$$\delta Q=dU+\delta W$$
So, as there is no heat exchange and assuming no work is done $$w$$ can write
$$\begin{array}{rl}& d{U}_{1\left(salt\right)}+d{U}_{2\left(salt\right)}=0\\ & \Rightarrow m{C}_A\left(T_f-T_A\right)=m{c}_B\left(T_f-T_B\right)\\ & \text{So,}{T}_f=\frac{m_{A}CATA+m_{B}cBTB}{m_A{c}_A+m_B{c}_B}\end{array}$$
So, the final temperature is dependent on concentration or composition.