Comment True (T) or False (F) for the following statements

(P) Same gas comes out when ${\mathrm{Na}}_2\mathrm{S}$ is treated with dil. $\mathrm{HCl}$ and  ${\mathrm{Na}}_2{\mathrm{SO}}_3$ is treated with (Zn+ diL ${\mathrm{H}}_2{\mathrm{SO}}_4$).

(Q) Same , observation when acidified nitrite solution is treated with urea or thiourea followed by addition of ${\mathrm{FeCl}}_3$ solution.

(R) Same observation when nitrite solution or acetate solution is treated with dil. ${\mathrm{H}}_2{\mathrm{SO}}_4$ solution.

(S) With ${\mathrm{CaCl}}_2$ and ${\mathrm{BaCl}}_2$ both acetate and formate do not react.