Question

The main use of ‘magnesia’ is as a/an __________.
1. Antibiotic
2. Pain killer
3. Antiseptic
4. Mild laxative

Answer 1

Correct Answer - Option 4 : Mild laxative

The correct answer is Mild laxative.

• Magnesium is used in products that benefit from being lightweight, such as car seats, luggage, laptops, cameras and power tools.
  • It is also added to molten iron and steel to remove sulfur.
  • As magnesium ignites easily in air and burns with a bright light, it's used in flares, fireworks and sparklers.
    
• Magnesium fires cannot be extinguished by water.
  • Magnesium continues to burn after oxygen is depleted.
  • It then reacts with nitrogen from the air to form magnesium nitride (Mg₃N₂).
  • When attempts are made to extinguish magnesium fires with water, magnesium aggressively reacts with hydrogen gas.
  • Magnesium is an important mineral, playing a role in over 300 enzyme reactions in the human body.
  • Its many functions include helping with muscle and nerve function, regulating blood pressure, and supporting the immune system.
  • Magnesium burns so brightly because the reaction releases a lot of heat.
  • As a result of this exothermic reaction, magnesium gives two electrons to oxygen, forming powdery magnesium oxide (MgO).