Nitrogen is liberated by the thermal decomposition of only:

Which of the following substances releases nitrogen gas upon thermal decomposition?

Which oxide of nitrogen is obtained on heating ammonium nitrate at $250 \, ^oC$?

The number of ions from the following that are expected to behave as oxidising agents is:
$Sn^{4+}$,$Sn^{2+}$,$Pb^{2+}$,$Tl^{3+}$,$Pb^{4+}$,$Tl^{+}$

Red phosphorus can be obtained from white phosphorus by:

An element $(X)$ forms compounds of the formula $XCl_3$,$X_2O_5$ and $Ca_3X_2$,but does not form $XCl_5$. Which of the following is the element?