Chemical Reactions and Properties

The video explores Earth's atmosphere, focusing on oxygen's role and reactivity. It demonstrates how oxygen reacts with sulfur and phosphorus, forming sulfur dioxide and phosphorus 5 oxide. The video further explains how these oxides dissolve in water to form acidic solutions, while metallic oxides form alkaline solutions, highlighting a pattern in chemical behavior.

What is one of the most important gases in Earth's atmosphere that supports life?

• Nitrogen

• Oxygen

• Helium

• Carbon Dioxide

What happens when a glowing splint is introduced to a jar full of oxygen?

• It melts

• It re-lights

• It extinguishes

• It changes color

What color flame does sulfur produce when it burns in oxygen?

• Yellow

• Blue

• Green

• Red

What is formed when red phosphorus is ignited and plunged into oxygen?

• Phosphorus dioxide

• Phosphorus pentoxide

• Phosphorus trioxide

• Phosphorus monoxide

What type of solution is formed when non-metal oxides dissolve in water?

• Basic

• Alkaline

• Acidic

• Neutral

What is the nature of the solution formed by soluble oxides of metals?

• Salty

• Alkaline

• Neutral

• Acidic