Introduction:

Transition elements hold a vital position in the periodic table due to their unique properties and versatile applications. Their compounds are equally significant, exhibiting diverse chemical behavior and practical uses in industries, medicine, and technology. This article delves into the key compounds of transition elements, offering concise and detailed notes tailored for Class 12 students. These notes will help you prepare effectively for board exams and competitive tests like JEE and NEET.

Potassium Dichromate (K₂Cr₂O₇):

Preparation:

Obtained from chromite ore by oxidation and conversion into sodium chromate, followed by acidification.

Properties:

- Orange crystalline solid.

- Soluble in water, giving an orange solution.

- Strong oxidizing agent.

Uses:

- Used in volumetric analysis.

- Acts as a mordant in dyeing.

- Employed in leather tanning and photography.

Read Also: General Properties of Transition Elements (d-Block) – Class 12 Chemistry Notes

Potassium Permanganate (KMnO₄):

Preparation:

Produced by oxidation of manganese dioxide (MnO₂) in an alkaline medium, followed by crystallization.

Properties:

- Deep purple crystals.

- Strong oxidizing agent in acidic, neutral, and basic media.

- Decomposes on heating to release oxygen.

Uses:

- Purifies water and acts as a disinfectant.

- Used in organic synthesis.

- Commonly employed in redox titrations.

Conclusion:

The compounds of transition elements are not just academically significant but also have wide-ranging industrial and practical applications. Understanding their preparation methods, chemical properties, and uses is crucial for excelling in Class 12 Chemistry exams and gaining insights into their role in daily life and technology. A thorough grasp of these compounds will strengthen your foundation for advanced studies and competitive exams.