In the water-gas shift reaction,hydrogen gas is produced from the reaction of steam with

$A$ deuteron contains

Which of the following statement$(s)$ is/are correct:
$A$. $NaH$ is a non-volatile hydride
$B$. $MgH_2$ is a polymeric hydride
$C$. $NH_3$ is an electron-precise hydride
$D$. $H_2O$ is an electron-rich hydride

In which of the following reactions does hydrogen act as an oxidizing agent?

Saline hydrides are known to react with water violently producing fire. Can $CO_2$,a well-known fire extinguisher,be used in this case? Explain.

Which of the following is an incorrect match?