Oxides of the active metals combine with water to form ________.
A)metal hydroxides
B)metal hydrides
C)hydrogen gas
D)oxygen gas
E)water and a salt

Question

Quizplus · Accepted Answer

Oxides of active metals react with water to form metal hydroxides. Metal hydroxides are alkaline and are often used in basic solutions. For example, sodium oxide (Na2O) reacts with water to form sodium hydroxide (NaOH) and calcium oxide (CaO) reacts with water to form calcium hydroxide (Ca(OH)2). Metal hydrides (B) are formed by the reaction of hydrogen with metals, not by the reaction of metal oxides with water. Hydrogen gas (C) is also not formed by the reaction of metal oxides with water but may be produced by the reaction of metals with acids. Oxygen gas (D) is not formed by the reaction of metal oxides with water, and water and a salt (E) may be produced by acid-base reactions but not by the reaction of metal oxides with water.

Oxides of the Active Metals Combine with Water to Form