Class 12 Chemistry - Chapter 18: Spectroscopy Notes (New Curriculum 2022-2023)

 If you are a Class 12 (HSSC-II) FBISE student, these handwritten notes for Chemistry Chapter 18: Spectroscopy are prepared according to the new FBISE National Curriculum (2022–2023) and current board exam requirements.

The notes focus on important spectroscopic techniques, their principles, and applications, including IR spectroscopy, UV-Visible spectroscopy, atomic emission spectroscopy, atomic absorption spectrum, and NMR spectroscopy, which are frequently tested in short and conceptual questions in FBISE exams. You can download the complete handwritten notes from the link provided under the Download section at the end of this post.

Chapter Overview: Spectroscopy

Spectroscopy is an important analytical technique used to study the interaction of electromagnetic radiation with matter. It helps in identifying substances, determining molecular structures, and analyzing chemical composition.

This chapter is mainly theory-based and is considered an important and scoring chapter if prepared properly.

Topics Covered

The following exam-relevant topics are covered in these notes: spectroscopic techniques, IR spectroscopy, UV-Visible spectroscopy, atomic emission spectroscopy, atomic absorption spectrum, Nuclear Magnetic Resonance spectroscopy, H NMR, and Carbon-13 NMR.

Important Concept Explanations

Spectroscopic Techniques: Spectroscopic techniques involve the study of absorption, emission, or scattering of electromagnetic radiation by matter. These methods are widely used for qualitative and quantitative chemical analysis.

IR Spectroscopy: Infrared spectroscopy is used to identify functional groups in organic compounds by measuring the absorption of infrared radiation due to bond vibrations.

UV-Visible Spectroscopy: UV-Visible spectroscopy studies the absorption of ultraviolet and visible light by molecules. It is commonly used to determine concentration and study electronic transitions.

Atomic Emission Spectroscopy: In this technique, atoms emit light of specific wavelengths when excited. It is used to identify elements present in a sample.

Atomic Absorption Spectrum: This technique measures the absorption of light by atoms in the gaseous state and is commonly used for elemental analysis.

Nuclear Magnetic Resonance (NMR) Spectroscopy: NMR spectroscopy is used to study the structure of organic compounds by analyzing the behavior of atomic nuclei in a magnetic field.

H NMR: Proton NMR studies hydrogen atoms present in a molecule and helps determine the number and environment of hydrogen atoms.

Carbon-13 NMR: Carbon-13 NMR is used to study the carbon skeleton of organic compounds and identify different carbon environments.

Why These Notes Are Helpful

Covers only FBISE exam-oriented content, easy language for quick memorization, helpful for short and conceptual questions, clear explanation of analytical techniques, and written in a student-friendly format.

Download/View Class 12 Chemistry Notes - Chapter 18 Spectroscopy

Chapter 18 - Spectroscopy

Final Tip for the Students

This chapter is highly important for FBISE exams. Focus on the basic principles, uses, and differences between the spectroscopic techniques, especially IR, UV-Visible, and NMR, as these are commonly asked in short and conceptual questions.