$2KBr+2H_{2}S{O}_4\left(con\right)\stackrel{\Delta }{\to }X\uparrow +Y\uparrow +otherproducts$

$\begin{array}{l}KBr+H_{3}P{O}_4\left(con\right)\stackrel{\Delta }{\to }Z\uparrow +otherproducts\\ (1:1)\end{array}$

$2KBr+Mn{O}_2+2H_{2}S{O}_4\left(conc\right)\stackrel{\Delta }{\to }X\uparrow +otherproducts$

Then identify the incorrect statement(s) regarding the given set of reactions?

 $Y\uparrow$ turns lead acetate paper black

$X=HBr$ and  $Z=B{r}_2$

A pale yellow precipitate is obtained as one of the product when Y reacts with  $H_{2}S$

X gives dark red precipitate when introduced into a beaker containing silver nitrate solution