Multiple choice

Which of the following statements is correct?

  1. Oxygen is lighter than air, so it is collected by the downward displacement of air.

  2. Phosphorous penta oxide is a basic gas which turns moist red litmus solution blue

  3. Sulphur forms neutral oxide when burned in oxygen.

  4. Metals like aluminium and zinc burn in oxygen to form their respective oxides, which are amphoteric in nature.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Correct. Aluminium and zinc form their respective amphoteric oxides; amphoteric oxides are compounds which show both acidic and basic character and can react with both acids and bases to form salt and water.

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