




This reaction sequence involves nucleophilic substitution.
The first reaction produces an intermediate which undergoes further substitution with AgCN to form the product.


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?
\(\text{A $\rightarrow$ B, K = 10$^4$ e$^{-24000/T}$} \)
\(\text{P $\rightarrow$ Q, K = 10$^6$ e$^{-30000/T}$} \)