Photodecomposition and Decomposition Reactions

The video tutorial explains decomposition reactions, focusing on electrical and photodecomposition. It begins with an overview of decomposition reactions, followed by a detailed explanation of electrical decomposition using water. The experimental setup is described, highlighting the use of graphite rods and a battery to decompose water into hydrogen and oxygen. The video then introduces photodecomposition, using silver chloride as an example, which decomposes into silver and chlorine under sunlight. The tutorial concludes with a summary and encourages viewers to engage with the content.

What is a decomposition reaction?

• A reaction where two reactants form a single product

• A reaction where a single reactant breaks down into simpler products

• A reaction where two products combine to form a reactant

• A reaction where energy is absorbed from the surroundings

In electrical decomposition of water, what are the products formed?

• Hydrogen and nitrogen

• Hydrogen and oxygen

• Carbon dioxide and water

• Oxygen and nitrogen

What material is used as electrodes in the electrical decomposition setup?

• Aluminum

• Copper

• Graphite

• Iron

What is the role of the battery in the electrical decomposition setup?

• To heat the water

• To supply electricity

• To provide light

• To cool the water

What is observed in the test tubes during the electrical decomposition of water?

• Temperature increase

• Bubble formation indicating gas production

• Color change in water

• Formation of solid precipitate

What is photodecomposition?

• Decomposition using heat

• Decomposition using electricity

• Decomposition using sunlight

• Decomposition using sound

Which compound is used as an example for photodecomposition?

• Sodium chloride

• Silver chloride

• Calcium carbonate

• Potassium permanganate

What happens to silver chloride when exposed to sunlight?

• It turns gray

• It turns blue

• It dissolves in water

• It remains white

What are the products of the photodecomposition of silver chloride?

• Silver and nitrogen

• Silver and oxygen

• Silver and chlorine

• Silver and hydrogen

What is the balanced equation for the photodecomposition of silver chloride?

• 2AgCl gives Ag2 + Cl2

• AgCl2 gives Ag + Cl2

• AgCl gives Ag + Cl

• 2AgCl gives 2Ag + Cl2