Tag: reactions of metals

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Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

The amphoteric metallic oxide is:

  1. calcium oxide

  2. barium oxide

  3. zinc oxide

  4. copper (II) oxide
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 An amphoteric oxide is an oxide that can act as either an acid or base in a reaction.
$Al _2O _3$ is an amphoteric oxide. When reacted with HCl, it acts as a base to form the salt $AlCl _3$. When reacted with NaOH, it acts as an acid to form $NaAlO _2$.
also, zinc oxide is an amphoteric oxide.

Multiple choice chemistry metals reaction of metals reactions of metals chemical properties of metals

Which one of the following is basic oxide?

  1. Nitrous oxide

  2. Nitric oxide

  3. Carbon monoxide

  4. Zinc oxide
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Metals generally form basic  oxides, some of which are also amphoteric, such as aluminium  oxide, zinc oxide, lead oxide etc.
Non-metals generally form acidic oxides. Some oxides are neutral, such as nitrous oxide, nitric oxide, carbon monoxide water etc.