Light green (Compound 'A') White Residue (B) C + D + E (i) 'D' and 'E' are two acidic gas. (ii) 'D' — d and f Block Elements Chemistry Question

Question

Light green (Compound 'A') $\xrightarrow{\Delta}$ White Residue (B) $\xrightarrow{\text{High Temp.}}$ C + D + E (i) 'D' and 'E' are two acidic gas. (ii) 'D' is passed through HgCl2 solution to give yellow ppt. (iii) 'E' is passed through water first and then H2S is passed, white turbidity is obtained. (iv) A is water soluble and addition of HgCl2 in it, yellow ppt is obtained but white ppt does not turn into grey on addition of excess solution of 'A'. [1]