If you are wondering how to study p-Block and d-Block for JEE, start with one number. JEE Main asked 139 questions from these two chapters across 2024, 2025 and 2026: 59 from p-Block Elements and 80 from d and f Block Elements. JEE Advanced asked 51 questions from them between 2015 and 2026. This guide breaks all of them down, based on the papers conducted by the National Testing Agency (jeemain.nta.ac.in) for JEE Main and the JEE Advanced papers from 2015 to 2026.
We went through every one of those questions and tagged it. p-Block questions are tagged by group (13 to 18) or as a trend across groups. d-Block questions are tagged by idea: configuration and oxidation states, magnetic moment and colour, general properties, KMnO4 and K2Cr2O7, and the f-block. The tables below show exactly where the marks come from, and the rest of the guide shows how to win them.
Inorganic Chemistry has a reputation for being pure memory. The papers show something more useful: the same few facts are asked again and again, often word for word in the form of two statements. If you learn the right facts in the right form, these become the fastest marks in the Chemistry paper.
Together they are one of the biggest blocks in JEE Main Chemistry. JEE Main had 67 questions from these two chapters in 2024, 31 in 2025 and 41 in 2026. That is about 11.2%, 6.5% and 8.6% of all Chemistry questions in those years, or roughly two questions in every paper.
d and f Block is the bigger half. It gave 80 Main questions against 59 for p-Block, and it was the heavier of the two in every year: 38 against 29 in 2024, 20 against 11 in 2025 and 22 against 19 in 2026.
The questions are fast. Most are statement questions ("Statement I is true, Statement II is false"), counting questions ("how many of these are paramagnetic?") or ordering questions. There is no long calculation. A student who knows the facts finishes them in under a minute, which saves time for Physical Chemistry.
They feed other chapters. Magnetic moment and d-electron counting come back in Coordination Compounds, and the reactions of KMnO4, K2Cr2O7 and the oxoacids appear in redox and organic questions.
"Inorganic is not about reading the chapter ten times. It is about knowing exactly which forty facts the paper keeps asking, and knowing the reason behind each one. When you know why Tl+ is more stable than Tl3+, you will never forget that it is." — AN Naik Sir, Chemistry HOD (IIT BHU, Ex-HOD Narayana Academy Hyderabad)
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p-Block and d-Block gave JEE Main 139 questions in three years, and most of them take under a minute if you know the facts. Learn the right facts, with their reasons, 1-on-1 with an IITian Chemistry HOD.
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Any plan for how to study p-Block and d-Block for JEE should start from the papers. Here is how many questions JEE Main asked from each chapter in each of the last three years.
| Year | p-Block | d and f Block | Total | MCQ + Numerical | Share of Chemistry Qs |
|---|---|---|---|---|---|
| 2024 | 29 | 38 | 67 | 54 + 13 | 11.2% |
| 2025 | 11 | 20 | 31 | 26 + 5 | 6.5% |
| 2026 | 19 | 22 | 41 | 38 + 3 | 8.6% |
| Total | 59 | 80 | 139 | 118 + 21 | — |
Here are the 59 p-Block questions sorted by group.
| p-Block topic | 2024 | 2025 | 2026 | Total |
|---|---|---|---|---|
| Group 15 (nitrogen, ammonia and the hydrides, HNO3, phosphorus) | 5 | 4 | 5 | 14 |
| Group 13 (boron, aluminium, gallium, the inert pair effect in thallium) | 7 | 2 | 4 | 13 |
| Group 16 (oxygen, ozone, sulphur, oxoacids of sulphur) | 6 | 2 | 1 | 9 |
| Trends across groups (oxides, hydrides, ionisation enthalpy, bond properties) | 3 | 2 | 4 | 9 |
| Group 14 (carbon, silicon, tin and lead, oxides) | 3 | 1 | 3 | 7 |
| Group 17 (halogens, hydrogen halides) | 3 | 0 | 2 | 5 |
| Group 18 (noble gases) | 1 | 0 | 0 | 1 |
| Other chapter* | 1 | 0 | 0 | 1 |
| Total | 29 | 11 | 19 | 59 |
And here are the 80 d and f Block questions sorted by idea.
| d and f Block topic | 2024 | 2025 | 2026 | Total |
|---|---|---|---|---|
| KMnO4, K2Cr2O7, manganate, chromate and chromyl chloride | 8 | 3 | 8 | 19 |
| Magnetic moment, unpaired electrons and colour | 7 | 7 | 4 | 18 |
| Configuration, oxidation states and their stability | 9 | 3 | 3 | 15 |
| General properties (ionisation and atomisation enthalpy, melting point, catalysis, interstitial compounds, alloys) | 3 | 4 | 5 | 12 |
| Lanthanoids and actinoids | 7 | 1 | 2 | 10 |
| Other chapter* | 2 | 0 | 0 | 2 |
| Not classified** | 2 | 2 | 0 | 4 |
| Total | 38 | 20 | 22 | 80 |
*Three questions filed under these chapters belong elsewhere: a test for phosphorus in organic compounds, the preparation of Mohr's salt and the IUPAC name of K2MnO4. They are counted in the yearly totals only. **The archived text of four d-Block questions did not render fully, so we could not tell what they test.
The message of these tables is simple. In p-Block, Groups 15 and 13 gave 27 of 59 questions, nearly half. In d-Block, KMnO4/K2Cr2O7 and magnetic moment gave 37 of 80, again nearly half. Group 18, the topic many students spend hours on with xenon fluoride structures, gave one Main question in three years.
Pattern 1: Trends down a group, asked as statements. 2026 asked twice about the group 15 hydrides NH3 to BiH3: thermal stability, basicity, reducing character, bond angle and boiling point. 2024 asked which hydride is the strongest reducing agent (BiH3). Learn each trend with its reason, because the statements often pair a correct trend with a wrong reason.
Pattern 2: The inert pair effect. Tl+ more stable than Tl3+ (2025, 2024), Pb2+ more stable than Pb4+ while Sn4+ is more stable than Sn2+ (2026), and the stability of the +1 state in Ga, In and Tl (2024). One idea, asked in group 13 and group 14 every year.
Pattern 3: Counting unpaired electrons. 2026 asked how many of Mn2+, Cu2+, Zn2+, Yb2+, Sc3+, La3+, Gd3+, Lu3+, Ti4+ and Ce4+ are paramagnetic. 2025 asked for the order of spin-only magnetic moments of Cu+, Cu2+, Cr2+ and Cr3+, and which ions have μ = 4.9 BM. Several numericals asked for the magnetic moment of a product of a reaction. Write the d-electron count of every common ion until it is automatic.
Pattern 4: The manganate and chromate chain. MnO2 fused with KOH and O2 gives green K2MnO4, which disproportionates or is oxidised to KMnO4 (2024 three times, 2026). Chromite fused with Na2CO3 in air gives Na2CrO4 and Fe2O3 (2024, 2025). NaCl with K2Cr2O7 and concentrated H2SO4 gives red chromyl chloride (2026, with a similar test in 2024). These are fixed sequences; learn each one as a chain.
Pattern 5: Anomalous first members and exceptions. Why nitrogen has a maximum covalency of 4 and forms no NX5 (2025, 2026), why gallium is smaller than aluminium (2025, 2024), why fluorine shows only one oxidation state and does not disproportionate (2024), why oxygen and sulphur have very different melting points (2025). JEE Main loves the exceptions more than the rules.
This is the 12-year view that most guides skip. JEE Advanced asked p-Block in every year from 2015 to 2026 and d and f Block in 9 of the 12 years.
| Year | p-Block | d & f Block | What was asked |
|---|---|---|---|
| 2026 | 2 | 0 | Uses of Cl2, ClF3 and a nitrogen compound (multi-correct) · statements on three species, probably xenon compounds |
| 2025 | 3 | 1 | Compounds with P–H bonds · hydrolysis of ICl, ClF3 and BrF5 · heating NH4NO2 and NH4NO3 · pairs of diamagnetic ions |
| 2024 | 3 | 0 | Compounds with a peroxide linkage · fluorination of PCl5 in a polar solvent · disproportionation of HNO2 |
| 2023 | 1 | 1 | Match reactions of P2O3, P4, PCl5 and H3PO2 with their products · a d-block reaction scheme |
| 2022 | 4 | 3 | Compounds giving BN with NH3 · HClO3 + HCl giving paramagnetic ClO2 · P4 in NaOH giving PH3 (numerical) · lead nitrate · galena with HNO3, Xe with O2F2, decomposition of AgNO3 |
| 2021 | 1 | 0 | Statements on the oxoacids of phosphorus |
| 2020 | 2 | 1 | Hypochlorite, chlorate and perchlorate · a salt-analysis question · K2CrO4 + H2O2 giving blue CrO5 (numerical) |
| 2019 | 4 | 3 | Bonds between like atoms (numerical) · XeF4 + O2F2 (numerical) · a tin chloride sequence · Zn with acid and alkali · MnO2 to manganate to permanganate · aqua regia · the borax bead test for Cr |
| 2018 | 3 | 2 | Compounds giving N2 on heating · group 15 statements · bridging oxo groups (numerical) · the number of diamagnetic species (numerical) · telling Mn2+ from Cu2+ |
| 2017 | 5 | 2 | 3-centre-2-electron bonds and Lewis acidity · HClO4 and HClO · colour of the halogens · two paragraph questions on KClO3 · amphoteric oxides · metals that liberate H2 |
| 2016 | 3 | 2 | HNO3 with P4O10 · the structure of borax · atomic radii in group 13 · precipitating S2− · Ag+ with thiosulphate |
| 2015 | 3 | 2 | The four oxoacids of chlorine · B2H6 with methanol (numerical) · lone pairs in N2O3 (numerical) · ions precipitated by H2S · Cr2+ and Mn3+ as reducing and oxidising agents |
| Total | 34 | 17 | 26 multi-correct · 14 single correct · 10 numerical · 1 match |
Advanced has a clear shape. In p-Block, Group 15 (11 questions, mostly phosphorus and nitrogen compounds) and Group 17 (9, mostly the oxoacids and interhalogens of chlorine) gave 20 of the 34. Group 16 gave none. In d and f Block, only 6 of 17 questions were about the d-block itself (magnetic moment, the manganate and chromate chemistry, and the Cr2+/Mn3+ pair). Most of the rest were qualitative salt analysis, and the f-block was never asked. Half the Advanced questions are multi-correct, so every statement in an option has to be checked.
The smartest way to plan these two chapters is to match your time to each topic. Use the time column in your mock tests: if you are consistently slower than the target, that topic needs more revision, not more reading.
| Topic | Main Qs (2024–26) | Advanced Qs (2015–26) | Difficulty | Target time |
|---|---|---|---|---|
| d-Block: KMnO4, K2Cr2O7 and their chains | 19 | 2 | Medium | 60–90 s |
| d-Block: magnetic moment and colour | 18 | 2 | Easy–Medium | 60 s |
| d-Block: configuration and oxidation states | 15 | 1 | Medium | 60 s |
| p-Block: Group 15 | 14 | 11 | Medium | 60 s |
| p-Block: Group 13 | 13 | 5 | Easy–Medium | 45–60 s |
| d-Block: general properties | 12 | 0 | Easy–Medium | 45–60 s |
| f-Block: lanthanoids and actinoids | 10 | 0 | Easy | 45 s |
| p-Block: Group 16 | 9 | 0 | Medium | 60 s |
| p-Block: trends across groups | 9 | 2 | Medium | 60–90 s |
| p-Block: Group 14 | 7 | 2 | Easy–Medium | 45–60 s |
| p-Block: Group 17 | 5 | 9 | Medium | 60 s |
| p-Block: Group 18 | 1 | 1 | Medium | 60 s |
Difficulty and target time are our faculty's guidance for exam practice, not exam data. Advanced counts exclude questions filed under these chapters that are really salt analysis or other topics (13), and three Advanced questions whose text did not render.
Group 15 is the most-asked p-Block group in both exams. Main asks the hydride trends and nitrogen's anomalous behaviour; Advanced asks phosphorus compounds and the products of heating ammonium salts.
Group 13 is Main's second favourite: the inert pair effect, gallium's small radius, boron's covalent nature and high melting point, and Al3+/Tl3+ stability.
KMnO4 and K2Cr2O7 covers their preparation from MnO2 and chromite, the manganate–permanganate and chromate–dichromate equilibria, CrO5, chromyl chloride, and why both compounds are coloured.
Magnetic moment and colour covers spin-only μ = √(n(n + 2)) BM, counting unpaired electrons in ions, and which ions are coloured or colourless.
Lanthanoids and actinoids covers configurations, the +2 and +4 states of Eu, Yb and Ce, lanthanoid contraction and colourless ions. JEE Main asked it 10 times; Advanced never did.
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KMnO4, K2Cr2O7 and magnetic moment gave nearly half the d-Block questions in JEE Main. Work through them with your own faculty, at your pace, with every doubt answered the same day.
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Knowing how to study p-Block and d-Block for JEE also means knowing what not to do. These are the mistakes we see most often when students solve these chapters' PYQs.
Keep this table open while you revise. These chapters run on a fixed list of facts, which is why learning how to study p-Block and d-Block for JEE is mostly about knowing them with their reasons.
| Topic | Key facts and reactions |
|---|---|
| Group 13 | B covalent, very high m.p. · atomic radius B < Ga < Al < In < Tl · +1 stability Ga < In < Tl (inert pair) · Tl3+ oxidising · BX3 Lewis acids, trigonal planar · B2H6 has 3c–2e bonds · B2H6 + 6CH3OH → 2B(OCH3)3 + 6H2 |
| Group 14 | SiO2, GeO2 acidic · SnO, PbO, SnO2, PbO2 amphoteric · CO neutral · Pb2+ more stable than Pb4+, Sn4+ more stable than Sn2+ · Sn has the lowest m.p. in the group |
| Group 15 | N: max covalency 4, pπ–pπ bonds, no NX5 · NH3 → BiH3: stability, basicity and bond angle fall; reducing power rises · NH4NO2 → N2 · NH4NO3 → N2O · P4 + 3NaOH + 3H2O → PH3 + 3NaH2PO2 · brown ring [Fe(H2O)5NO]2+ |
| Group 16 | O: −2 (and +2 in OF2), forms pπ–pπ bonds so O2 is diatomic; S forms S8 · +4 more stable than +6 down the group · oleum H2S2O7 has 7 O atoms · H2Te most acidic hydride |
| Group 17 | F only −1, does not disproportionate · Cl2, Br2, I2 disproportionate in alkali · b.p. HCl < HBr < HI < HF · acid strength HF < HCl < HBr < HI · HOCl < HClO2 < HClO3 < HClO4 in acid strength · interhalogens hydrolyse to HX + oxoacid of the larger halogen |
| Group 18 | XeF2 linear, XeF4 square planar, XeF6 distorted octahedral · b.p. rises down the group with dispersion forces |
| Oxide character | Across a period: basic → amphoteric → acidic · down a group: more basic · higher oxidation state → more acidic (CrO basic, Cr2O3 amphoteric, CrO3 acidic) |
| d-electron counts | Sc3+, Ti4+ d0 · V3+ d2 · Cr3+ d3 · Cr2+, Mn3+ d4 · Mn2+, Fe3+ d5 · Fe2+ d6 · Co2+ d7 · Ni2+ d8 · Cu2+ d9 · Cu+, Zn2+ d10 |
| Magnetic moment | μ = √(n(n + 2)) BM: n = 1 → 1.73 · 2 → 2.83 · 3 → 3.87 · 4 → 4.90 · 5 → 5.92 |
| 3d trends | Mn has the most oxidation states (+2 to +7) · Sc shows only +3 · highest atomisation enthalpy V (among 3d) · IE1: Cr < Mn, IE2: Cr > Mn · Zn, Cd soft, low atomisation enthalpy |
| KMnO4 | 2MnO2 + 4KOH + O2 → 2K2MnO4 (green) + 2H2O · 3MnO42− + 4H+ → 2MnO4− + MnO2 + 2H2O · MnO4− tetrahedral, diamagnetic; MnO42− paramagnetic |
| K2Cr2O7 | 4FeCr2O4 + 8Na2CO3 + 7O2 → 8Na2CrO4 + 2Fe2O3 + 8CO2 · 2CrO42− + 2H+ ⇌ Cr2O72− + H2O · chromyl chloride CrO2Cl2 (red, Cr +6) · CrO5 (blue, two peroxide groups, Cr +6) |
| f-block | Ln3+ common · Ce4+ oxidising, Eu2+ and Yb2+ reducing · 4f7: Eu2+, Gd3+ · colourless: La3+ (4f0), Lu3+ (4f14) · actinoid contraction greater than lanthanoid contraction |
This is the core of how to study p-Block and d-Block for JEE: one topic at a time, starting with the ones that have given the most marks. Do not move on until you can answer the PYQ statements under each heading without notes.
This is the single most-asked d-Block topic. Learn it as two chains:
Worked example from JEE Main 2024 (numerical): MnO2 fused with KOH in air gives A, and A disproportionates in acid; find the sum of the spin-only magnetic moments of the products. A is K2MnO4. In acid it gives MnO4− (Mn7+, d0, μ = 0) and MnO2 (Mn4+, d3, μ = 3.87). The sum is about 4.
Worked example from JEE Main 2025 (numerical): chromite fused with Na2CO3 in air; the water-insoluble product is Fe2O3, with molar mass 160 g mol−1.
Practice target: write both chains from memory, with colours and oxidation states, then solve every PYQ on them.
This is pure counting, and it is free marks once the d-electron counts are automatic.
Worked example from JEE Main 2026 (numerical): how many of Mn2+, Cu2+, Zn2+, Yb2+, Sc3+, La3+, Gd3+, Lu3+, Ti4+ and Ce4+ are paramagnetic? Mn2+ (d5), Cu2+ (d9) and Gd3+ (4f7) have unpaired electrons. Zn2+ (d10), Yb2+ and Lu3+ (4f14), and Sc3+, La3+, Ti4+ and Ce4+ (all empty shells) do not. The answer is 3.
Practice target: make a table of every 3d ion from +1 to +4 with its d-count, unpaired electrons and μ. Then solve every magnetic-moment PYQ.
"Every magnetic moment question is two steps: count the d-electrons, then count the unpaired ones. Students lose these marks only because they take electrons from 3d before 4s. Remove 4s first, every time." — AN Naik Sir, Chemistry HOD (IIT BHU, Ex-HOD Narayana Academy Hyderabad)
These two groups carry half of p-Block. For each, learn the trend down the group and the anomaly of the first member.
A typical 2025 question gave two statements: "nitrogen forms oxides in all oxidation states from +1 to +5 because of pπ–pπ bonding" and "nitrogen does not form NX5 because it has no d-orbitals". Both are true. The reasons are what the question tests.
Practice target: write one page per group with the trends and anomalies, then solve every PYQ on Groups 13 and 15.
These are fact questions with clear reasons:
Practice target: 30 PYQ statements from these two groups. For each, write the reason next to the fact.
This is the easiest marks-per-hour topic in the two chapters. 2024 asked the configurations of neodymium and einsteinium, which elements are not lanthanoids, diamagnetic and colourless lanthanoid ions, and why Ce4+ is an oxidant. 2025 and 2026 asked about 4f7 ions and pairs with the same number of 4f electrons. Learn the configuration pattern, the stable +2 and +4 ions and their reasons, and lanthanoid contraction.
Practice target: one revision page and all 10 PYQs. That is enough.
Do these last, but do not skip them. Group 16 gave 6 of its 9 Main questions in 2024 (oleum, sulphur's oxidation states, S8 versus O2); Group 17 is Advanced's second favourite, through the oxoacids of chlorine and the interhalogens; and the cross-group trend questions (oxide character, amphoteric oxides, bond properties) appear every year. Learn the oxide-character rules and the oxoacid strength orders in the fact table.
Worked example from JEE Main 2024 (numerical): among Cl2O7, CO, PbO2, N2O, NO, Al2O3, SiO2, N2O5 and SnO2, the amphoteric oxides are PbO2, Al2O3 and SnO2, so the answer is 3. CO, N2O and NO are neutral; Cl2O7, SiO2 and N2O5 are acidic.
Practice target: every PYQ from these groups, plus a one-page sheet of oxide and oxoacid trends.
That is how to study p-Block and d-Block for JEE topic by topic. Once you have finished, test yourself under exam conditions with our JEE test series, and bring any question that still does not make sense to the JEE Doubt Lab for a 1-on-1 explanation.
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Multi-correct inorganic questions are where JEE Advanced aspirants lose the most marks. Practise phosphorus, chlorine and transition-metal chemistry 1-on-1 with an IITian Chemistry HOD.
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If you are deciding how to study p-Block and d-Block for JEE Advanced as well as Main, this section is for you. Advanced goes further in four places.
Advanced asked 11 Group 15 questions in 12 years: compounds with P–H bonds (2025), the products of heating NH4NO2 and NH4NO3 (2025), compounds that give N2 on heating (2018), the oxoacids of phosphorus (2021), a match of P2O3, P4, PCl5 and H3PO2 reactions (2023), and P4 in boiling NaOH giving PH3 (2022, numerical). Know each reaction with balanced products.
The four oxoacids of chlorine were asked in 2015, 2017 and 2020, and KClO3 decomposition in a 2017 paragraph. 2022 asked for the paramagnetic gas from HClO3 and HCl (ClO2), and 2025 asked for the hydrolysis products of ICl, ClF3 and BrF5. Learn the structures, the oxidation states and the acid-strength order.
Advanced numericals ask you to count: lone pairs in N2O3 (2015), compounds with a bond between like atoms (2019), bridging oxo groups (2018), O atoms singly bonded to Cr in CrO5 (2020) and moles of B(OCH3)3 from B2H6 and methanol (2015). Draw every structure in the fact table at least once.
Most of Advanced's d and f Block questions are really salt analysis: ions precipitated by H2S in dilute HCl (2015), telling Mn2+ from Cu2+ (2018), the borax bead test for chromium (2019) and the reactions of Ag+ with thiosulphate (2016). If you are preparing for Advanced, revise the cation and anion tests alongside the d-block.
"In Advanced, inorganic questions are multi-correct, and one wrong statement costs you the whole question. Do not mark an option because it looks familiar. Check every statement against a fact you are sure of." — AN Naik Sir, Chemistry HOD (IIT BHU, Ex-HOD Narayana Academy Hyderabad)
The last step in how to study p-Block and d-Block for JEE is an honest self-check. You should be able to answer "yes" to every line below without notes.
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All 9 JEE Main 2026 April shift papers as 3-hour online tests, with the official NTA answer key, an instant score and a step-by-step solution for every question.
Start the free test series →p-Block and d-Block gave JEE Main 139 questions from 2024 to 2026 (59 from p-Block and 80 from d and f Block) and JEE Advanced 51 questions from 2015 to 2026. In Main, KMnO4/K2Cr2O7 and magnetic moment gave nearly half the d-Block questions, and Groups 15 and 13 gave nearly half the p-Block questions. In Advanced, phosphorus and chlorine compounds dominate p-Block, and salt analysis dominates the d-Block questions. So if you are working out how to study p-Block and d-Block for JEE, the order is clear: the two d-block chains and magnetic moment first, then Groups 15 and 13, then d-block properties and the f-block, and finish with the remaining groups and cross-group trends.
How we built this data. We went through every JEE Main shift paper from 2024, 2025 and 2026 and every JEE Advanced paper from 2015 to 2026, picked out each question from p-Block Elements and d and f Block Elements, and tagged it by group or idea. Where the archived text of a question was too incomplete to classify with confidence, we counted it in the totals and said so instead of guessing. Questions filed under these chapters that belong to another topic are counted in the totals and footnoted.
If you want a faculty member to check your preparation, every pack starts with a free 30-minute mentorship call. p-Block Elements and d & f Block Elements each have their own packs on our JEE Chemistry coaching page, and once your exam is done, our JEE counselling team can help you turn your rank into the right college and branch.
Counting all shifts, JEE Main asked 67 questions from these two chapters in 2024, 31 in 2025 and 41 in 2026. d and f Block gave 38, 20 and 22 of those, and p-Block gave 29, 11 and 19. That is about two questions in a typical paper.
JEE Main questions are mostly easy once the facts are learned, and they take under a minute each. The difficulty is remembering many facts accurately. JEE Advanced questions are harder because they are mostly multi-correct. If you follow this guide on how to study p-Block and d-Block for JEE, the Main questions become quick marks with steady revision.
Yes. They gave 139 JEE Main questions from 2024 to 2026, and p-Block was asked in every JEE Advanced exam from 2015 to 2026. d and f Block was asked in 9 of those 12 Advanced exams.
No. Skipping them gives up about two questions per JEE Main paper, and these are some of the fastest questions in the Chemistry section. You can prioritise inside them: the d-block chains, magnetic moment and Groups 13 and 15 cover more than half the questions.
Master KMnO4 and K2Cr2O7, magnetic moment, d-block configuration and oxidation states, and Groups 15 and 13. In JEE Main 2024–2026 these five topics gave 79 of the 139 questions. Add d-block properties and the f-block and you cover 101 of 139.
Phosphorus and nitrogen compounds (11 of 34 p-Block questions from 2015 to 2026) and the oxoacids and interhalogens of chlorine (9). Advanced also asks counting numericals on structures, and most of its d and f Block questions are about qualitative salt analysis. The f-block was not asked in Advanced in those years.
