JEE Main · Chemistry — Inorganic Chemistry · South Korea

Chemistry — Inorganic Chemistry for the JEE Main Exam — Korean candidates

9% of the JEE Main test plan. p-block elements, d-block and f-block elements, coordination compounds, and chemical bonding — approximately 30% of JEE Chemistry. Calibrated for Korean candidates.

Examiners do not award marks for content alone — they award them for the ability to demonstrate competency in the precise format the test demands. Chemistry — Inorganic Chemistry sits at roughly 9% of the Joint Entrance Examination Main content distribution — Inorganic Chemistry is the most memorisation-heavy section of JEE Chemistry and is where students who invest time in rote learning pick up easy marks. Coordination chemistry and p-block reactions are virtually guaranteed in every paper. JEE Advanced tests VSEPR shapes and crystal-field theory. Pass rates for the JEE Main are published annually by the awarding body and vary by cohort and locale. For Korean candidates preparing for JEE Main, the calibration of study to local context matters: TOEIC and TOEFL are the dominant English credentials. TOPIK (Korean proficiency) and CSAT (Suneung) gate domestic outcomes.

Pass rates for JEE Main (South Korea) are published periodically by the awarding body.

Common failure modes

These are the patterns that cause most candidates to lose marks on this topic. Recognising them in advance is half the work.

!Confusing the oxidation states of transition metals in complex ions — particularly chromium and manganese
!Misidentifying VSEPR geometry when lone pairs are present (e.g., SF₄ is see-saw, not tetrahedral)
!Getting wrong the colour of precipitates in qualitative analysis (salt analysis)
!Forgetting the conditions for back-bonding in p-block compounds (BF₃ vs BCl₃ Lewis acidity)
!Confusing EAN (effective atomic number) rule with the 18-electron rule for coordination complexes

Study tips

1Make a reaction chart for each p-block group — list the key reactions of Group 15, 16, 17, 18 with clear mnemonics. JEE Main tests these directly.
2Memorise the colours, magnetic properties, and IUPAC names of at least 20 common coordination compounds — they appear as direct-recall questions.
3For d-block, learn the electronic configurations of first-row transition metals (especially Cr and Cu anomalies) and their common oxidation states.
4Drill NCERT Inorganic reactions — a significant fraction of JEE Main inorganic questions are NCERT-derived.
5Use flashcards for oxyacids of halogens: structure, oxidation state of the central atom, and relative acid strength.
6한국 응시자에게 JEE Main 대비의 핵심은 독해 속도와 듣기 정확도입니다 — 한국식 시험 문화와 다른 출제 패턴에 익숙해지세요.

Sample JEE Main Chemistry — Inorganic Chemistry questions

These sample items mirror the format and difficulty of real JEE Main questions. Practice with thousands more on the free Koydo question bank.

1
The coordination number of platinum in [Pt(NH₃)₂Cl₂] is:
- A2
- B4Correct
- C6
- D8
Why this answer?
Illustrative JEE-style: The square-planar complex [Pt(NH₃)₂Cl₂] has two NH₃ ligands and two Cl⁻ ligands directly bonded to platinum, giving a coordination number of 4.
2
Which of the following has a trigonal bipyramidal geometry?
- ABF₃
- BPCl₅Correct
- CSF₆
- DH₂O
Why this answer?
Illustrative JEE-style: PCl₅ has 5 bonding pairs and no lone pairs; VSEPR gives trigonal bipyramidal geometry. BF₃ is trigonal planar, SF₆ is octahedral, H₂O is bent.
3
The oxidation state of Cr in K₂Cr₂O₇ is:
- A+3
- B+4
- C+6Correct
- D+7
Why this answer?
Illustrative JEE-style: In K₂Cr₂O₇, potassium is +1 and oxygen is −2. Let Cr be x: 2(+1) + 2x + 7(−2) = 0 → 2 + 2x − 14 = 0 → x = +6.

Frequently asked questions

How much of NCERT Inorganic Chemistry is directly tested in JEE Main?

Roughly 60–70% of JEE Main Inorganic questions can be answered using NCERT content verbatim or with minor adaptation. Completing NCERT exercises and in-text examples is the minimum baseline.

Is coordination chemistry important for JEE Advanced?

Yes. JEE Advanced tests isomerism (geometric, optical, linkage), magnetic properties from unpaired d-electrons, and stability constants. Crystal-field theory (high-spin vs low-spin) appears occasionally.

What is the JEE Main pass rate for Korean candidates?

Pass rates for JEE Main candidates in South Korea are published periodically by the awarding body. Practice questions, full-length simulations, and weak-area drills are the highest-impact way to improve your odds.

How long should Korean candidates study Chemistry — Inorganic Chemistry for the JEE Main?

For most candidates, focused mastery of Chemistry — Inorganic Chemistry requires 20–40 hours of deliberate practice — drilling sample questions, reviewing failure modes, and timing yourself against exam conditions. TOEIC and TOEFL are the dominant English credentials. TOPIK (Korean proficiency) and CSAT (Suneung) gate domestic outcomes. Combine Chemistry — Inorganic Chemistry study with full-length mock exams in the final two weeks before your test date.

Practice JEE Main free with Koydo.

PCM full-length tests, NTA-aligned, with previous-year drill sets.

Start free JEE practice →Practice this topic with AI

Related study guides

Regulatory citation: NTA JEE Main Information Bulletin — Chemistry syllabus (Classification of Elements, p-Block, d/f-Block, Coordination Compounds, Chemical Bonding).