Salt (A) is a white deliquescent solid. On heating the solid, brown fumes were evolved. On adding NaOH to the salt solution of (A), a white gelatinous ppt. was obtained. On adding, a drop of blue litmus solution to the ppt., a blue lake was obtained. On adding DPA to the salt solution, a deep blue colouration was obtained. Identify the salt and give the equations involved.

Salt (A) is a white deliquescent solid. On heating the solid, brown fu

1.	Salt (A) is a white deliquescent solid. On heating the solid, brown fumes were evolved. On adding NaOH to the salt solution of (A), a white gelatinous ppt. was obtained. On adding, a drop of blue litmus solution to the ppt., a blue lake was obtained. On adding DPA to the salt solution, a deep blue colouration was obtained. Identify the salt and give the equations involved.
Answer» Solution :(i) `2AL(NO_(3))_(3)OVERSET(Delta)toAl_(2)O_(3)+6NO_(2)uarr+(3)/(2)O_(2)uarr` `(ii) `Al(NO_(3))_(3)+3NaOHtoAl(OH)_(3)darr+3NaNO_(3)` `Al(OH)_(3)+"Blue litmus solution" to"Blue lake"` [Note: A lake is a ppt. floating in a clear liquid.] (iii) `NO_(3)^(-)+(C_(6)H_(5))_(2)NHtoNO_(2)^(-)+(C_(6)H_(3))_(2)N-N(C_(6)H_(5))_(2)+H_(2)O`