What products are formed when $1 \ mol$ of calcium phosphide reacts with an excess of water?

Consider three metal chlorides $x$, $y$ and $z$, where $x$ is water soluble at room temperature, $y$ is sparingly soluble in water at room temperature and $z$ is soluble in hot water. $x$, $y$ and $z$ are respectively:

Holme's signals can be obtained by using

Which of the following is an $\text{Incorrect}$ statement?

Which of the following thermal stability orders is correct?

To distinguish between $A$ and $B$,it is observed that both elements form oxides,but $B$ also forms a nitride when burnt in air. What are $A$ and $B$?