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Kerala Water Authority Sanitary Chemist Exam Coaching

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Kerala Water Authority Sanitary Chemist Exam Overview

The Kerala Water Authority Sanitary Chemist Exam is a State level examination conducted by the Kerala Public Service Commission. The exam is designed to test the knowledge and skills of the candidates in the field of water testing, water quality analysis, and related subjects. The exam is highly competitive, and candidates who pass the exam are eligible for the post of Sanitary Chemist in the Kerala Water Authority. 

The exam is a two-stage examination process. The first stage is the preliminary exam, which is an objective type test that assesses the candidate's basic knowledge in the relevant subjects. The second stage is the mains exam, which is a descriptive type test that evaluates the candidate's in-depth understanding and application of the subject matter. Candidates who wish to apply for the exam must meet the eligibility criteria set by the Kerala Water Authority.

Kerala Authority Sanitary Chemist Vacancy
The Kerala Public Service Commission (KPSC) has recently released a notification on their official website, inviting applications for the post of Sanitary Chemist under Category No. 127/2023. As per the notification, there are four vacancies available for the position. Interested candidates can download the Kerala Authority Sanitary Chemist Notification for more information on the recruitment process, including eligibility criteria, application procedure, and important dates.
Kerala Authority Sanitary Chemist Selection Process

The Kerala Authority Sanitary Chemist Selection Process typically includes a written exam, an interview (if required), and a verification of documents.

The written exam is conducted to assess the candidate's understanding of various topics such as water quality, water treatment, and related subjects. If the candidate clears the written exam, they are invited for an interview (If required). Once the interview is complete, the candidates are called for document verification. The document verification process includes checking the candidate's educational qualifications, and other relevant documents such as identity proof and address proof.

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Entri is a comprehensive platform to help you prepare for the Kerala Water Authority Sanitary Chemist exam. You can cover the complete syllabus through live or recorded classes conducted by expert mentors, and receive curated study materials. Entri also provides real-time assessments, mock exams, and practice question papers to familiarize you with the exam format and types of questions. Additionally, revision classes, WhatsApp groups, and doubt-clearing sessions are available to help you revise your understanding of the subject matter and clear your doubts.

Water Authority Sanitary Chemist Notification

Kerala PSC has issued a notification for the Sanitary Chemist, Category No. 127/2023, in Kerala Water Authority. Four positions are being filled through this recruitment process. The application procedure began on June 17, 2023, and concluded on August 16, 2023. Find an overview of the notification below.



Name of recruiting organization

Kerala Public Service Commission (PSC)

Name of department

Kerala Water Authority

Name of post

Sanitary Chemist

Category No.


Mode of application


Application Period

June 17, 2023 - August 17, 2023

Mode of recruitment

Direct Recruitment

Number of vacancies

As per Notification

Exam Date

June 13 2024

Official website


Kerala Authority Sanitary Chemist Eligibility Criteria
The eligibility requirements to apply for the Kerala Water Authority Sanitary Chemist Vacancy are as follows:
Age Limit
  • Applicants should be in the age limit of 18 to 36 years.
  • Only candidates born between 02.01.1987 and 01.01.2005
    (both dates included) are eligible to apply for this post.
  • Other Backward Communities and SC/ST candidates are eligible for usual age relaxation.
Educational Qualification
  • Applicants should have the following qualifications:
  • A Bachelor's Degree in Science with Chemistry / Biochemistry / Microbiology as the main subject or its equivalent obtained from a recognized University / National Institutes established by the Central Government or Institutions established by the Government of Kerala
Kerala Authority Sanitary Chemist Syllabus
Below is the detailed syllabus for the post of Sanitary Chemist at Kerala Water Authority. The syllabus consists of three sections - Chemistry, Microbiology, and Biochemistry.
Kerala PSC Sanitary Chemist Syllabus 2024: Chemistry

The topics coming under Kerala PSC Sanitary Chemist Syllabus 2024 Chemistry are listed below.

Chemistry In Everyday Life



Household Materials

  • Detergent
  • Soap
  • cooking gas
  • cosmetics
  • hair dye
  • toothpaste shampoo
  • moth balls

Food Industry

  • Preservatives
  • Additives
  • Adulterants
  • Artificial sweeteners


  • Urea
  • Superphosphate
  • NPK
  • Pesticides

Paints and Pigments

  • White pigments (white lead, ZnO, Lithopone, TiO2)
  • Paints
  • Blue, yellow, red and green pigments
  • Distempers


  • Types of plastics
  • Natural and synthetic polymers
  • Problems of plastic waste management

Physical Chemistry



Acid-base chemistry

  • Arrhenius
  • Lewis and Lowry Bronsted concepts
  • Introduction to SHAB principle


  • Colligative properties
  • Calculating of molar mass of solutes
  • Osmotic pressure

Ionic equilibria

  • Strong electrolytes and weak electrolytes
  • ionic product of water
  • degree of dissociation
  • Dissociation constant of weak acids

Chemical thermodynamics

  • Concept of heat
  • internal energy
  • Work
  • entropy
  • enthalpy
  • free energy

Chemical kinetics

  • Order of reaction
  • molecularity of reaction
  • affecting the rate of reactions
  • rate laws-factors
  • Collision theory

Chemistry of Water




  • Hydrogen bonding and its consequences
  • Chemical structure and bonding
  • Polarity

Properties of Water

  • freshwater and seawater
  • Pure water
  • Water softening
  • Hardness of water
  • Heavy water

Water Pollution

  • Causes
  • Reverse osmosis and electrodialysis
  • Treatment of industrial wastewater
  • Management and control of water pollution

Water Analysis

  • pH
  • specific conductance
  • temperature
  • turbidity
  • chlorinity
  • salinity
  • Total hardness
  • Dissolved Oxygen

Water Quality

  • Definition
  • Physicochemical and biological parameters of water
  • Water quality standards such as BIS, WHO, USEPA

Qualitative and Quantitative Aspects of Chemistry



Lab safety awareness

  • material safety
  • Labels
  • Hazard warning symbols
  • Flammable solvents
  • Explosive compounds
  • burns and electric shock
  • Emergency procedures in chemical splashes

Preparation of solutions

  • Normal solutions
  • Molar solutions
  • Molal solutions
  • Percentage solutions

Inorganic qualitative analysis

  • Solubility product
  • Principle of analysis of anions and cations
  • common ion effect

Quantitative analysis

  • Acid
  • Theory of titrations
  • base
  • redox
  • conductometry
  • precipitation
  • potentiometry

Theory of indicators

  • Redox
  • Acid-base
  • metallochromic indicators and adsorption
  • Choice of indicator
Kerala PSC Sanitary Chemist Syllabus 2024: Biochemistry

The topics that come under Kerala PSC Sanitary Chemist Biochemistry are provided below.

Foundations of Life




  • Unique properties of water that support life
  • Ionization of water
  • Hydrogen bonding

Molecules of life

  • Importance of carbon
  • Basic idea about the classification of carbohydrates
  • important properties of carbohydrates
  • important properties of proteins
  • important properties of lipids
  • important properties of nucleic acids
  • stabilizing interactions in the biological macromolecules


  • Classification and properties
  • Coagulation
  • Application of colloids in daily life
  • Donnan Membrane Equilibrium
  • Dialysis
  • Emulsions
  • types and biological applications of emulsions
  • Emulsifying agents

Biophysical chemistry

  • Laws of thermodynamics
  • Ka, pH and pKa
  • concept of free energy and spontaneity
  • Biological buffers
  • High-energy compounds and coupled reactions
  • Henderson Hasselbalch equation

Cell Biology

  • Basics on structure and functions of cell membrane
  • Basics about Mitochondria
  • Basics about Golgi bodies
  • Basics about Endoplasmic reticulum
  • Basics about Nucleus
  • Basics about Lysosome

Biochemical Techniques




  • Electromagnetic Spectrum
  • Principle of light-absorbing molecules
  • Beer Lambert’s law
  • Principle and working of Colorimeter
  • Principle and working of Spectrophotometer
  • Applications of Colorimetry
  • Applications of Spectrophotometry


  • Partition
  • Thin Layer Chromatography
  • Adsorption
  • Gel filtration
  • Column Chromatography
  • HPLC
  • Affinity Chromatography
  • Rf value
  • Gas Chromatography


  • Protein and Nucleic acid separation
  • PAGE
  • Agarose
  • PAGE
  • SDS
  • Staining techniques
  • Visualization techniques


  • Principle of sedimentation
  • factors affecting sedimentation
  • Types of rotors
  • Preparative centrifugation
  • Subcellular
  • Differential
  • Density gradient
  • Analytical
  • centrifugation
  • ultracentrifugation


  • Measurement of radioactivity
  • Units of radioactivity
  • Scintillation Counter
  • GM Counter
  • Applications of radioisotopes in biological sciences
  • Autoradiography
  • Safe handling of radioactive materials
  • Radiation hazards





  • Classification
  • Active site
  • Nomenclature
  • coenzymes
  • Mechanism of action

Enzyme kinetics

  • Things affecting the rate of enzyme-catalyzed reactions
  • Vmax
  • Km
  • Lineweaver Burk Plot
  • Michaelis Menten equation

Enzyme inhibition

  • Competitive inhibition
  • Noncompetitive inhibition
  • Uncompetitive inhibition

Enzyme regulation

  • Covalent modification
  • kinetics
  • Allosteric enzymes
  • Multienzyme complex
  • cooperativity

Enzyme technology

  • Industrial applications of enzymes
  • Therapeutic applications of enzymes
  • diagnostic applications of enzymes
  • Immobilized enzymes
  • Abzymes
Kerala PSC Sanitary Chemist Syllabus 2024: Microbiology

The topics that come under Kerala PSC Sanitary Chemist Microbiology are discussed below.




  • Principle
  • types


  • Physical methods
  • Chemical methods

Culture media

  • Types of media
  • Solid
  • Semisolid
  • Liquid
  • Synthetic
  • Enriched
  • Complex
  • Enrichment
  • selective
  • Differential

Culture methods

  • spread plate
  • Pour plate
  • streak plate
  • GasPak jar
  • Anaerobic culture methods
  • McIntosh and Fildes Jar

Staining methods

  • Simple
  • Acid-fast staining
  • Gram staining
  • Spore staining
  • Negative staining


Microbial Testing of Water



Sampling of water

Bacteriological examination for water

  • Presumptive coliform tests
  • confirmed coliform tests
  • completed coliform tests

Indicator organisms

Sewage treatment

  • primary
  • secondary
  • tertiary

Approaches of disinfection for the onsite wastewater treatment


Environmental Microbiology



Management of Solid waste

  • Composting


  • Pesticides contamination
  • Detergents contamination
  • Petroleum contamination
  • Hydrocarbon contamination


  • Production Rhizobium
  • Application of Rhizobium
  • Azotobacter
  • Azospirillum

Symbiotic Nitrogen Fixation

Biogeochemical cycles

Here are a few tips to help you prepare for Water Authority Sanitary Chemist effectively

Understand Exam Syllabus

Download a hard copy of the exam syllabus or verify the PDF. It will outline the topics covered in the exam to ensure you have a clear understanding of each topic and prioritize your study accordingly.

Practice Previous Exam Papers

Go through the previous question papers and practice solving them to familiarize yourself with the exam format, time constraints, and types of questions asked.

Take Mock Tests

Take regular mock tests to assess your progress and identify areas where you need improvement. Analyze your mistakes and focus on strengthening your weaknesses.

Stay Updated

Stay updated with the latest developments and topics in sanitary chemistry, including new analytical techniques, regulations, and emerging contaminants.

Improve your Time Management

Practice time management by giving sufficient time to each section of the syllabus and try to practice solving questions within the allotted time.

Join Study Groups

Consider joining study groups or forums where you can discuss concepts, share study materials, and solve problems together with fellow aspirants.

Seek Guidance if Needed

If you experience difficulties with any topic, don't hesitate to seek guidance from teachers, mentors, or subject matter experts.

Tips for preparing Sanitary Chemist Exam


The Kerala Water Authority Sanitary Chemist Exam is a competitive examination conducted to recruit qualified candidates for the position of Sanitary Chemist within the Kerala Water Authority.
Interested candidates can apply online through the official website of the Kerala Water Authority or as per the instructions provided in the recruitment notification.
Yes. Each correct answer carries 1 mark and for each wrong answer, 1/3 mark will be deducted.
Candidates need to carry their hall ticket, a valid photo ID proof, and any other documents mentioned in the exam instructions.
The cutoff score may vary each year based on factors such as the number of vacancies, the difficulty level of the exam, and the performance of candidates.