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Chemistry Olympiad Sri Lanka

Chemistry Olympiad Sri Lanka (COSL)

Institute of Chemistry Ceylon (IChemC) annually conducts the Chemistry Olympiad Sri Lanka (COSL) competition in view of popularizing Chemistry and promoting problem-solving in Chemistry among the school children.

International Chemistry Olympiad (IChO) conducted a remote (online) theory examination this year due to the pandemic situation in the world.

Sri Lanka participated as a team in IChO for the first time in history in July 2020 and won 3 Bronze medals and an honorable mention.

Winners of COSL 2020

Sajini Nadara Boyagoda Gold
Arulanantham Abbinanthan Silver
Uvindu Praveen Sumanasekara Silver
Jeyanandarasa Kirushikan Bronz
Chanupa Devnith Wijesinghe Honorable Mention
M.B.Shakindi Vihangana Honorable Mention

Finalists of COSL 2020 based on the results of the preliminary examination held on January 12, 2020.

Name of the Candidate School
1 Ravindu Sanwara Ananda College, Colombo
2 Arulanantham Abbinanthan J/Jaffna Hindu College, Jaffna
3 Sajini Nadara Boyagoda Girls’ High School, Kandy.
4 Nadun Naveendra Rajapaksha Dharmaraja College, Kandy
5 P. Navodi Bhagya Wijesekara Sirimavo Bandaranaike Vidyalaya
6 Thishanka Alahakoon Dharmaraja College Kandy
7 Uvindu Praveen Sumanasekara B/Badulla Central College, Badulla
8 P.B.K Sanjana Gimhani Kapukotuwa Maliyadeva Balika Vidyalaya
9 Niluka Bandara Marasinghe Kingswood College, Kandy
10 Thinupa Anjana Wijetunga Richmond College , Galle.
11 Jeyanandarasa Kirushikan Jaffna Hindu College, Jaffna
12 Sureshkumar Miruthy J/Vembadi Girls’ High School, Jaffna
13 Samith Kavishke Karunathilake BD/ Central College, Badulla
14 Uditha Sandaruwan Wijeratne Dharmaraja College, Kandy
15 P.L.Pamudi Maleesha Mendis Southlands College, Galle.
16 Akesh Samuditha Gunathilake St. Anne’s College , Kurunegala
17 Malitha Pasindu Lankanayake Maliyadeva College, Kurunegala
18 Isuri Udarika Elawella Liyanage Girls’ High School, Kandy.
19 Janani Nethmini Girls’ High School , Kandy
20 C N Weerasinghe Kingswood College, Kandy
21 Pramujitha Banuka Ariyaratne Trinity College, Kandy
22 Chanupa Devnith Wijesinghe Richmond College, Galle.
23  Dinithi Shalika Madhubhashini Southlands College, Galle
24 I Anfas Ahamed KM/KM/Zahira College, Kalmunai
25 Dulitha Hasith Deiyagala Harischandra National College, Negombo
26 K.B.R.Dushan Balasooriya Ananda College.Colombo 10.
27 Karunairasan Makarathan Talawakelle Tamil Maha Vidyalayam
28 Kaveesh Shamantha Perera St. Joseph Vaz College, Wennappuwa
29 A.P.Sithum Minthaka Ananda College, Colombo 10.
30 K C K Manawathilake Dharmaraja College, Kandy
31 M.B.Shakindi Vihangana Sujatha Vidyalaya,Matara
32 Lasith Gaurauv Balasooriya Mahinda College, Galle
33 Amandi Dilshara Samarawickrama G/Sanghamiththa College, Galle
34 Avanika Varatharasa J/Vembadi Girls’ High School, Jaffna
35 P D Misal Lakdinu Kumarasiri Bd/ Central College, Badulla
36 Buddhi Saumye Kumara St.Sylvester’s College, Kandy

COSL 2020 National Competition and training camps will be held on February 5, 6, 7 at the Institute of Chemistry Ceylon, Rajagiriya.

COSL preliminary examination was held on January 12, 2020 at 12 centers islandwide.

Await for results

Sri Lankan participation at the IChO 2019

Dr Ireshika de Silva, Secretory of the COSL has participated as an observer  at the International Chemistry Olympiad (IChO) 2019 in Paris, France. This was the second consecutive year Sri Lanka participated as observers at IChO. Next year IChO is in Turkey and we are hoping to be there as a team.

Winners of COSL 2019 

Gold R. M. Sugath Ravindu Sanwara Ananda College, Col 10
Silver Thishanka Alahakoon Dharmaraja College, Kandy
Bronz R. M. P. Akila Prabodha Rajapaksha Bandaranayake College, Gampaha

Merit awards

W. M. Buddhi Saumya Kumara Wijenayake St. Sylvester’s College, Kandy
R. M. Nethmini Nirasha Rathnayake St. Joseph’s Balika M.V , Kegalle
P. B. K. Sanjana Gimhani Kapukotuwa Maliyadewa Balika Vidyalaya, Kurunegala
Anisha Jude Joachimson Chundilkuli Girls’ College, Jaffna
Sachintha Tashen Paranga Narangoda Richmond College, Galle
Sivathasan Tharsikan Jaffna Hindu college
R.P. Gnalitha Mithun Diumantha Samaranayake Maliyadewa College
Jeyanandarasa Kirushikan Jaffna Hindu college

Commendation Certificates 2019 

Those who won certificates of commendations for achieving more than 50 marks at the preliminary round please contact IChemC and collect your certificates.

The list of students received commendation certificates (click here). Commendation Certificates 

COSL-2019 Final Round 

COSL 2019 training sessions and final theory and practical examinations were held on 23rd and 24th of May, 2019 at the adamantane house, Institute of Chemistry Ceylon with the participation of 29 finalists.

Finalists with the rector of College of Chemical Sciences, Prof Sujatha Hewage and members of the COSL committee.

2019 Finalists 

A letter informing the date of the final competition and workshop has been sent to the top 30 students. (Contact us if anyone has not received it yet.)

1 Sugath Ravindu Sanwara Ananda College, Colombo 10
2 Thishanka Alahakoon Dharmaraja College, Kandy
3 R. M. P. Akila Prabodha Rajapaksha Bandaranayake College, Gampaha
4 R.M.N. Nirasha Rathnayake St. Joseph’s Balika M.V , Kegalle
5 Arulanantham Abbinanthan Hindu College, Jaffna
6 O. V. Visura Prabod Jayanandana Rahula College, Matara
7 Sanjana Gimhani Kapukotuwa Maliyadewa Balika Vidyalaya, Kurunegala
8 Pamudi Mahinsa Jayalathge Sanghamiththa Balika Vidyalaya, Galle
9 Anisha Jude Joachimson Chundilkuli Girls’ College
10 R P G M D Samaranayake Maliyadewa College, Kurunegala
11 K. G. Thilakna Randinee Kumaratunga Mahamaya Girls’ College, Kandy
12 Pavindu Udeesha Jayasekara Richmond College, Galle
13 S. Tharsikan Hindu College, Jaffna
14 Buwaneka Avishka Bandara Epakanda Dharmaraja College, Kandy
15 H.M.P.B.Ariyaratne Trinity College, Kandy
16 K.H. Thushan Chamika Rahula College, Matara
17 N. D. Kasun Tharindu Lakshan Ibbagamuwa Cental College
18 Sanduni Jananika Ubayasiri Mahamaya Girls’ College, Kandy
19 W. M. B. S. K. Wijenayake St. Sylvester’s College, Kandy
20 Namina Kaushalya Wijethunga Bandaranayake College, Gampaha
21 Jeyanandarasa Kirushikan Hindu College, Jaffna
22 Sachintha Tashen Paranga Richmond College, Galle
23 Dithira Yasasvin Wellappuli Rahula College, Matara
24 Nilushi Navodya Dhanapala Mahamaya Girls’ College, Kandy
25 Piumini Kaveesha Ranasinghe Viharamaha Devi Girls’ College, Badulla
26 Bhanuka Lakshan Arandara C. W. W Kannangara MMV, Mathugama
27 Thinupa Anjana Wijethunga Richmond College, Galle
28 Hansa Niluka Bandara Marasinghe Kingswood College, Kandy
29 Nimaya Sandamini Siriwardhane Sirimavo Bandaranayake Vidyalaya, Colombo 07
30 Hansaka Gayan Somaweera Bandaranayake College, Gampaha

Commendation Certificates (click)

Applications for COSL-2019 is Closed. The examination will be held on January 27, 2019.  Admission cards will be posted soon. 

Find the admission number and exam center.  If your name/ID number is not correct or any other inquiry please email us (cosl@ichemc.edu.lk) 

Also, if you have not provided the ID number you need to send that to us immediately.

Please, note that a standard non-programmable calculator is allowed to use during the examination.

Download instructions to candidates (pdf)

Download the application form and instructions (word, pdf )

Download the brochure (Sinhala, Tamil)

The competition will be open for any student below 20 years of age as at 1st July 2019.

The students interested in participating should fill the attached application form and send to the following address along with the bank payment slip (or receipt) on or before 28th December 2018.

Postal Address

Chemistry Olympiad Sri Lanka

Institute of Chemistry Ceylon

Adamantane House

341/22, Kotte Road, Welikada


The format of the examination

COSL consists of two rounds.

Preliminary selection test

This will be held at 12 regional centers in January each year. The duration of the examination will be two hours and will be conducted in all three languages namely, English, Sinhalese and Tamil. The question paper will consist of multiple choice questions and structured type questions which covers the first 5 units of the local Advanced Level Chemistry syllabus (i.e. Atomic structure, Structure and bonding, Chemical calculations, Gaseous state of matter, Energetics), along with questions on basic organic Chemistry including stereochemistry.

Final theory and practical examination

Depending on the performances at the preliminary examination, the selected students will be invited to take part in the final round of the COSL. Theory and practical workshops will be conducted at the IChemC premises at Rajagiriya for the finalists prior to the final examination.

Awards and certificates

National level winners will receive medals, certificates, monetary awards, and scholarships to study GIC programme in Chemistry.

In addition, students who obtain more than 50% marks from the preliminary exam will receive certificates of commendation.

International Chemistry Olympiad (IChO)

The International Chemistry Olympiad (IChO) is a competition organized for secondary school students of all levels from all over the globe with the objective of promoting their creativity and cognitive skills in solving chemistry problems. The IChO competitions help to facilitate cordial relations between the youth of different nationalities and encourage networking.

IChO is just one out of the 12 International Science Olympiads held in the world. The rest cover other disciplines, such as Mathematics, Physics, Biology, etc. IChO headquarters is based in Bratislava, Slovakia of the former Eastern Bloc. This event began in 1968 with the participation from Czechoslovakia, Poland and Hungary. Other Eastern European countries joined the program subsequently. Western European nations entered to participate in this event in 1974 and the USA in 1984.

Some of the goals of the Chemistry Olympiad are as follows.

  • Stimulate young aspiring minds to achieve excellence in Chemistry
  • Recognize outstanding Chemistry students
  • Encourage additional systematic learning at a formative age in their intellectual development
  • Foster networking through multicultural experience
  • Recognize the untiring input given by the teacher and the teaching methodologies adopted

Currently, around 80 countries participate in this annual competition held for the world’s most talented secondary school level Chemistry students. In 2018 50th IChO competition was held in Bratislava, Slovakia and Prague, Czech Republic.

The Olympiad program is a multi-tiered competition and consists of the following format.

  1. Local section competition
  2. National Olympiad examination
  3. Training camps
  4. International Chemistry Olympiad (IChO)

Only the teams chosen through a National Chemistry Olympiad competition are invited to take part in the IChO.

IChO steering committee has officially accepted the Institute of Chemistry Ceylon (IChemC) as the official organizer to conduct the National Chemistry Olympiad competition in Sri Lanka. In 2016, the Governing Council of the IChemC formed a committee comprising of academics attached to universities and institutes to organize and conduct the National Chemistry Olympiad Competition in Sri Lanka, which thus is named as Chemistry Olympiad Sri Lanka (COSL).

Sri Lanka participated in IChO as an observer in 2018 and will participate in IChO competition as a team in the year 2020.

COSL Steering Committee

  • Dr Chinthaka Ratnaweera (Chairman) – Senior Lecturer, Institute of Chemistry Ceylon
  • Dr Ireshika de Silva (Secretary) – Senior Lecturer, University of Colombo
  • Prof Janitha Liyanage – Senior Lecturer, University of Kelaniya
  • Prof Priyani Paranagama – Dean, College of Chemical Sciences, Institute of Chemistry
  • Prof Sudantha Liyanage – Dean, Faculty of Science, University of Sri Jayawardhanapura
  • Dr Poshitha Premarathne – Past Chairman of The Royal Chemical Society Sri Lanka section
  • Dr Chandani Udawatta – Senior Lecturer, Institute of Chemistry Ceylon
  • Dr Sameera Gunathilaka – Senior Lecturer, Institute of Chemistry Ceylon
  • Dr Gobika Thiripuranathar – Senior Lecturer, Institute of Chemistry Ceylon
  • Dr Punya Keerthi – Secretary, Institute of Chemistry Ceylon
  • Dr Piyal Ariyananda – Scientist, MAS Holdings

Chemistry Olympiad Sri Lanka 2020 – Newspaper Article 

Educational Resources

Preliminary Examination 2019 full pdf (English, Sinhala, Tamil, MCQ answers, Structured answers)

Preliminary Examination 2018 exaper link for MCQs with solutions (English, Sinhala, Tamil)

Preliminary Examination 2018 full pdf (English, Sinhala, Tamil)


International Chemistry Olympiad Information Center

ICHO 2020