CSS Chemistry Past Papers 2016–2026: PDF Download

Chemistry is a 200-mark optional subject with two papers. The CSS Chemistry past papers are especially useful for seeing how much working is expected in numerical problems, reactions, and short derivations. Questions set by FPSC can also combine several small parts, so knowing a chapter generally is not always enough.

Download CSS Chemistry Past Papers

Before you start serious preparation, download the available CSS Chemistry past papers and organize them year-wise. Since Chemistry is a 200-mark optional subject, FPSC divides it into Paper-I and Paper-II, each carrying 100 marks.

CSS CHEMISTRY PAST PAPER-1 2026
CSS CHEMISTRY PAST PAPER-2 2026

CSS CHEMISTRY PAST PAPER-1 2025
CSS CHEMISTRY PAST PAPER-2 2025

CSS CHEMISTRY PAST PAPER-1 2024
CSS CHEMISTRY PAST PAPER-2 2024

CSS CHEMISTRY PAST PAPER-1 2023
CSS CHEMISTRY PAST PAPER-2 2023

CSS CHEMISTRY PAST PAPER-1 2022
CSS CHEMISTRY PAST PAPER-2 2022

CSS CHEMISTRY PAST PAPER-1 2021
CSS CHEMISTRY PAST PAPER-2 2021

CSS CHEMISTRY PAST PAPER-1 2020
CSS CHEMISTRY PAST PAPER-2 2020

CSS CHEMISTRY PAST PAPER-1 2019
CSS CHEMISTRY PAST PAPER-2 2019

CSS CHEMISTRY PAST PAPER-1 2018
CSS CHEMISTRY PAST PAPER-2 2018

CSS CHEMISTRY PAST PAPER-1 2017
CSS CHEMISTRY PAST PAPER-2 2017

CSS CHEMISTRY PAST PAPER-1 2016
CSS CHEMISTRY PAST PAPER-2 2016

CSS Chemistry Past Paper Trends

Recent papers leave little room for preparing only the big topics. The 2024 Paper II, for example, included mass spectrometry, NMR, stereochemistry and organic synthesis, but also moved into the urea cycle and industrial chemistry. The 2025 paper continued that spread, with organic reactions, spectroscopy, enzymes and industrial processes appearing across the paper. In 2026, Paper I included a detailed comparison of physisorption and chemisorption based on both energetics and kinetics. A recurring feature is the amount of ground covered within individual questions, often through several short parts rather than one broad discussion.