Identify the inorganic sulphides that are yellow in colour:
(A) \( ({NH}_4)_2{S} \)
(B) \( {PbS} \)
(C) \( {CuS} \)
(D) \( {As}_2{S}_3 \)
(E) \( {As}_2{S}_5 \)
Choose the correct answer from the options given below:




Find temperature (in Kelvin) at which rate constant are equal for the following reaction?
\(\text{A $\rightarrow$ B, K = 10$^4$ e$^{-24000/T}$} \)
\(\text{P $\rightarrow$ Q, K = 10$^6$ e$^{-30000/T}$} \)