Chemistry Learning Path
High School (11–12) Chemistry
Explore structured chemistry courses, solved problems, simulations and Python activities.
Choose a topic to see its subtopics.
Groups 17 and 18: The Halogens and the Noble Gases
Fluorine, chlorine, bromine and iodine are the most reactive non-metals. The noble gases were once thought to react with nothing. We follow chlorine and hydrogen chloride, the interhalogen compounds and the acids of chlorine, and then the compounds of xenon and their shapes. It covers the Indian syllabus (NCERT, NEET, JEE Main) and the matching topic of A-Level, IB and AP.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Group 15: Nitrogen, Ammonia and Phosphorus
Air is four fifths nitrogen, yet nitrogen is hard to make use of. We see why, follow ammonia from the Haber process to the Ostwald process and nitric acid, and meet phosphorus with its allotropes, phosphine, chlorides and acids. It covers the Indian syllabus (NCERT, NEET, JEE Main) and the matching topic of A-Level, IB and AP.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Group 16: Oxygen, Ozone and Sulphur
Oxygen is in the air we breathe and in the ozone that shields us from the sun. Sulphur makes the acid that is used in the largest amount in industry. We study the oxides, ozone and its layer, the forms of sulphur, sulphur dioxide, the contact process and the acids of sulphur. It covers the Indian syllabus (NCERT, NEET, JEE Main) and the matching topic of A-Level, IB and AP.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
The Boron Family: Boron, Borax and Aluminium
Gallium melts in your hand, an aluminium can does not rust, and boric acid is safe enough for an eyewash. We read the trends of group 13, see why boron is the odd one out, and study borax, boric acid, diborane and the compounds of aluminium.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
The Carbon Family: Allotropes, Oxides and Silicon
Diamond and pencil lead are both pure carbon, and sand and glass are both built from silicon. We follow group 14 from carbon down to lead: the allotropes of carbon, the oxides of carbon, silicon and the silicates, silicones and zeolites.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Across Groups 13 and 14: Oxidation States and Compounds
Why do thallium and lead prefer their lower oxidation states, and why does boron trifluoride grab ammonia? We compare the two groups: the inert pair effect, hydrides, halides, oxides and carbides, and then practise the structure and reaction questions that join them.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Radioactive Decay and Half-Life
Why do some nuclei break up on their own? Alpha, beta and gamma decay with their nuclear equations, the decay law with half-life and mean life, and activity, decay series and radioactive dating.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Carbohydrates: Sugars, Starch and Cellulose
Honey tastes sweet and cotton does not, yet both are built from glucose. We follow the sugars from glucose and fructose to sucrose, starch, cellulose and glycogen: their open and ring forms, their reactions and their optical rotations.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Amino Acids, Peptides, Proteins and Enzymes
An egg turns white when it is boiled, and a drop of enzyme can break down a whole pan of starch. We study the amino acids and their charges, the peptide bond, the levels of protein structure, denaturation, and how an enzyme speeds up a reaction in chemical terms.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Vitamins, Nucleic Acids and Hormones
A lack of one small molecule can cause scurvy, and one changed base can change a protein. We sort the vitamins by solubility and deficiency, build DNA and RNA from bases, sugars and phosphate, explain the double helix, and meet the hormones.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Amines: Classes, Names and Preparation
What an amine is and how it differs from ammonia and from an alcohol. Primary, secondary and tertiary amines, their names, the six main ways to make them, and why their boiling points and solubility are what they are.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →
Reactions of Amines and Aniline
How strongly an amine acts as a base and what changes it. The amino group reacts with halides, acid chlorides, chloroform, nitrous acid and sulphonyl chloride. These reactions give tests that tell the three classes apart. Then we turn to the substitution reactions of the ring of aniline.
3Lessons10Problems2Python Labs1Question Set1Mock Test
Explore Course →