SInce you are taking
General certificate of education "Odinary" level, an examination
co-examined by Singapore Assessment and Examinations board and
University of Cambridge International Examinations, a brand name of
University of Cambridge Local Examinations Syndicate, a department
of University of Cambridge
Use british convention always
Exception: Sulfuric acid is spelt as it is, do not use sulphuric
acid as it is a misspelt word in O lvs, cambridge revised the rule
of sulfuric acid this year