What is hydrogenation class 10th NCERT?

In Class 10 NCERT Chemistry, hydrogenation is defined as the chemical addition of hydrogen to unsaturated hydrocarbons in the presence of catalysts like nickel, converting them to saturated compounds.

Hydrogenation in Class 10 Curriculum

The NCERT Class 10 Science textbook introduces hydrogenation in Chapter 4 ("Carbon and its Compounds") as part of understanding chemical reactions of organic compounds.

NCERT Definition and Concept: Hydrogenation is the process of adding hydrogen molecules to unsaturated organic compounds (alkenes, alkynes) containing double or triple bonds, converting them into saturated compounds (alkanes).

General Equation:

Unsaturated Hydrocarbon + H₂ → Saturated Hydrocarbon
 (Ni catalyst, Heat)

Standard NCERT Example:Vegetable Oil Hydrogenation

• Reactant: Liquid vegetable oil (unsaturated fats with C=C bonds)
• Conditions: Nickel catalyst + Heat (around 200°C)
• Product: Solid/semi-solid vanaspati ghee or margarine
• Chemical Change: C=C double bonds convert to C-C single bonds

Key Learning Points from NCERT:

• Demonstrates addition reactions in organic chemistry
• Shows practical application of chemical reactions
• Illustrates role of catalysts in reactions
• Explains why liquid oils become solid fats
• Connects chemistry to everyday products

Exam-Focused Information:

• Usually asked as 2-3 mark question
• Diagram showing conversion expected
• Mention of nickel catalyst is essential
• Example of vegetable oil transformation required

Key Takeaways:

• Class 10 focuses on hydrogenation as addition reaction
• Main example: vegetable oil → vanaspati/margarine
• Nickel catalyst essential for reaction
• Converts unsaturated to saturated compounds
• Part of Carbon and its Compounds chapter