Which of the following substances does not release $O_2$ and acts as a dehydrating agent?

Which of the following statements is incorrect regarding saline hydrides?

Choose the incorrect statement for deuterium.

In the production of hydrogen by the Bosch process,which of the following is used as a catalyst?

Consider the following statements:
$1.$ Atomic hydrogen is obtained by passing hydrogen through an electric arc.
$2.$ Hydrogen gas will not reduce heated aluminium oxide.
$3.$ Finely divided palladium adsorbs large volume of hydrogen gas.
$4.$ Pure nascent hydrogen is best obtained by reacting $Na$ with $C_2H_5OH$.
Which of the above statements is/are correct?

What is the structural formula of lithium tetrahydridoaluminate?