Question

Aluminium reacts with caustic soda to form:

• A. aluminium hydroxide
• B. aluminium oxide
• C. sodium meta-aluminate
• D. sodium tetra aluminate

Answer 1

Answer: (C)

sodium meta-aluminate

Answer 2

Aluminium reacts with caustic soda to form sodium meta aluminate.
$2Al + 2NaPH + 2H_2O \to \underset{\text{Sodium meta aluminate}}{2NaAlO_2} + 3H_2 \uparrow$