Multiple choice

Which element, when burnt in the atmosphere of oxygen, emits a brilliant brick red flame and the product formed turns moist red litmus paper blue?

  1. Calcium

  2. Sodium

  3. Potassium

  4. Sulphur

Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

It burns with a brick red flame and the product formed is a basic oxide, which when treated with moist red litmus, turns it blue.