Chemistry - Ranil Ramanayaka (රනිල් රාමනායක)
දශකයක් පුරා දිස්ත්රික් ප්රථමයන් තැනූ අද්විතීය රසායන විද්යාව සිද්ධාන්ත පුනරීක්ෂණ පන්තිය
Chemistry English and Sinhala Units, Past paper Reviews, Theory and Revision all at one place.
Chemical calculations - part 3
Chemical Calculations Part 4 - Mass percentage
Chemical Calculations Part 5 - Empirical formula
Chemical Calculations Part 6 - Avogadro's Law
Chemical Calculations part 7 - Valency
Chemical calculations part 8 - Solutions and concentration
Chemical calculations Part 9 - Solution preparation
Chemical Calculations Part 10 - fractions
Chemical Calculations Part 11 - Stoichiometry
Chemical Calculations Part 12 - Stoichiometry Problems
Chemical Calculations Part 13 - Oxidation numbers
Chemical Calculations Part 14 - Redox half reactions
Chemical Calculations part 15 - Redox full reactions balancing
Chemical calculations Part 17 - IUPAC nomenclature
Gases Part 4
Gases Part 3
Gases Part 2
Weak Bases - pH equilibrium
Equilibrium Kp Kc part 1
Equilibrium Kp Kc Part 2
Equilibrium Kp Kc Part 3
Equilibrium Kp Kc Part 4
pH Acid Base equilibrium part 1
pH Acid Base equilibrium part 2
pH Acid Base equilibrium part 3 - Bases
Organic chemistry - බෙන්සීන්
Organic chemistry - Alkenes
Organic chemistry - Alkynes
Organic Chemistry - Benzene
Organic chemistry - Alkyl Halides