IB ACIO Study Material 2025 PDF: Books for Tier 1 and Tier 2 Preparation

Feb 5, 2026

IB ACIO is one of the best opportunities for graduates to join the Intelligence Services. IB ACIO Syllabus is similar to other Government Recruitment exams like Banking, SSC, etc. IB follows a three-stage exam pattern for IB ACIO. There will be a Computer Based Test (CBT) in Tier 1, English Descriptive test in Tier 2, and Interview in Tier 3. Check Daily Current Affairs

Table of Contents

IB ACIO English Notes
IB ACIO Quant Notes
IB ACIO Reasoning Notes
IB ACIO Geography Notes
IB ACIO History Notes
IB ACIO Polity Notes
IB ACIO Science Notes
IB ACIO Current Affairs
IB ACIO Static GK
FAQs

In this article, students will get PDF notes for all the subjects of the IB ACIO Tier 1 and Tier 2 exam syllabus- English, Quant, Reasoning, Geography, History, Current Affairs, Science, and GK.

IB ACIO Study Materials 2025: Download English Language Notes PDF

English is one of the things that you need to strengthen while preparing for the IB ACIO Exam. English forms part of Tier 1 and Tier 2 of the IB ACIO Exam. Questions on grammar, vocabulary, comprehension, precis writing, and error detection are asked in the exam. The notes provided here will help you to strengthen your English Skills and perform better in the IB ACIO Exam.

IB ACIO English Topics	IB ACIO English Study Materials PDF
Synonyms and Antonyms	List of words with Synonyms and Antonyms with Practice Questions
Sentence Rearrangement	Concepts, Types, Tips and Tricks with Examples on Sentence Rearrangements with Practice Questions
Sentence Corrections	Rules with Example and Practice Questions on Sentence Correction
Reading Comprehensions	Types of Passages and Tips on Reading Comprehension with Practice Questions
Active and Passive Voice	Concept, Types, Rules with Solved Questions on Active and Passive Voice with Tests
Direct and Indirect Speech	Concept, Rules with Examples and Practice Questions on Direct and Indirect Speech
Error Spotting	Concept with Examples and Practice Questions on Error Spotting
Fill in the Blanks	Important Topics, and Tips with Practice Questions on Fill in the Blanks
Idioms and Phrases	List of Idioms and Phrases with Meaning and Practice Questions
Basics of Noun	Kinds, Types, Rules with Special Cases on Nouns and Practice Questions
Basics of Verb	Concept, Tips and Tricks, Rules with Important Points of Verb with Practice Questions
Basics of Pronoun	Types, Concepts, Important Points and Practice Questions on Pronouns
Basics of Adjective	Types, Concepts, Rules with Solved Questions on Adjective with Adjectives
Basics of Adverbs	Rules with Examples, Important Points, and Practice Question
Basics of Prepositions	Uses, Meanings with examples and Practice Questions on Prepositions
Basics of Conjunction	Types and Concepts and Rules with examples on Conjunctions
Basics of Articles	Types, Rules with Practice Questions on Articles

IB ACIO Study Materials 2025: Download Quantitative Aptitude Notes PDF

Quantitative aptitude forms part of Tier 1 of the IB ACIO Exam. Tabulated below are the topic-wise Quant notes that will be helpful during IB ACIO Preparation.

IB ACIO Study Material Topics	IB ACIO Quant Study Materials PDFs
Number System	Types with Examples, Solved Question with Practice Question on Number System
Simple & Compound Interest	Definition, Points to Remember with Examples on Simple and Compound Interest
HCF & LCM	Concept, Relation, Methods, with Examples and Practice Questions on HCF & LCM
Trigonometry	Ratio, Useful Identities, on Trigonometry with Practice Questions
Time, Speed & Distance	Methods, and Types of Time, Speed & Distance with Examples
Time & Work	Concept, Basic Questions and Practice Questions on Time and Work
Simplification	Types and Methods of Simplification with Examples
Ratio & Proportion	Definition, Types with Important Questions on Ratio and Proportion
Profit & Loss	Concept, Points to Remember, and Formulae, with Solved Examples on Profit and Loss
Percentage	Concept, Conversions, Solved Problems and Practice Questions on Percentage
Mensuration	Types, Concept, Formulae with Explanation on Mensuration
Logarithm	Definition, Types, Rules of Logarithm with Examples and Practice Questions
Geometry	Types and Concepts with properties on Geometry with Examples and Problems
Data Interpretation	Concept, Important Points, Types with examples on Data Interpretation
Average	Concepts, Important Formulae with Examples of Average with Practice Questions
Algebraic Equations	Concepts with Examples, Methods for solving on Algebraic Equations

Check out IB ACIO 2025 Exam Practice Papers and Answer Keys

IB ACIO Study Notes PDFs for Reasoning Ability Section

Reasoning forms a part of Tier 1 of the IB ACIO Written exam. Here are the topic-wise study notes for the reasoning section of the IB ACIO Exam that will help you to build good reasoning ability.

IB ACIO Reasoning Topic	IB ACIO Study Material PDF
Syllogism	Basic Syllogism, Syllogism Possibility, New Keywords, Reverse Syllogism
Inequality	Important symbols and their meaning, Basic Inequality, Coded Inequality
Direction and Distance	Directions, Types of Questions
Blood relation	Important Symbol and their meaning, Pointing or Introducing, Family Tree
Alpha-numeric series	Alphabet Test, Number Series, Alphabet Series, Mixed Series
Order and ranking	Total Number of persons, Rank of a person from the left or right side
Puzzle	Floor Puzzle, Scheduling Puzzle, Day Based Puzzle
Seating arrangement	Linear Arrangement, Circular Arrangement, Polygonal Arrangement, Triangular Arrangement
Input-Output	Machine Input, Some Important Tips, Key Factors
Coding decoding	Letter to Letter Coding, Letter to Number Coding, Substitutional Coding
Data sufficiency	Relationships, Dates, Comparison, Figures
Reasoning Analogy	Types of Analogy questions, Tips & Tricks to solve Reasoning Analogy, Solved examples
Classification (Word, Number, Figural)	Questions on classification, choosing the odd pair of words, choosing the odd letter group
Venn Diagrams	Different types of questions based on Venn diagrams and solved examples
Mathematical Operations	Methods to solve mathematical operations questions
Statement and Conclusion	Concept, tips & tricks to solve statement and conclusion questions
Calendar & Clock	Concept, the basic structure of calendar and solved examples

Check out IB ACIO Salary Structure, Pay Scale, Allowances & Benefits.

IB ACIO Study Materials: Download Geography Study Notes PDFs

Geography is one of the crucial parts of the IB ACIO Exam. Basic questions on Indian and World Geography are asked in the Tier 1. Candidates can find the topic-wise study notes for preparing Geography for the IB ACIO Exam and download the PDF given below.

IB ACIO Geography Topics	IB ACIO Geography Study Material PDFs
Geography	Geography Notes
Indian Geography	The Himalayas & Northern Plains of Physical Features of India
Indian Geography	Peninsular Plateau & Coastal Plains of Physical Features of India
Indian Geography	Drainage System in India
Indian Geography	Types of Soil in India
Indian Geography	Agriculture in India and Types of Crops
Indian Geography	Crucial Lakes in India
Indian Geography	Indian Climate and Weather
Indian Geography	Natural Vegetation
World Geography	Solar System
Indian Geography	Important Dams in India
Indian Geography	Mineral Resources
World Geography	Peaks, Mountain Range, and Important Revers
World Geography	Important Deserts
World Geography	Oceans, Currents, Volcanoes and Boundaries of the countries
World Geography	Interior Composition of Earth
Physical Geography	Clouds with its types

IB ACIO Study Materials 2025: Download IB ACIO History Study Note PDFs

History questions are in the Tier 1 of the IB ACIO Exam. There are several books to take reference from, such as NCERT History Textbooks and Spectrum, that students can refer to. Provided below are some of the important history notes that will help you to understand and clear the concepts.

IB ACIO History Topics	IB ACIO History Study Material PDFs
Ancient History	Ancient History Notes
Medieval History	Medieval History Notes
Modern History	Modern History/Freedom Struggle Notes
Art & Culture	Art and Culture Notes

Check out IB ACIO Eligibility 2025: Age Limit, Educational Qualification & Others.

IB ACIO Study Material: Download Indian Polity Notes PDF

Basic knowledge about Indian Polity, Constitution of India, Preamble of India, Fundamental Rights, and Political Hierarchy, etc. is required for the exam. Students can easily prepare for polity by NCERTs and below study notes.

IB ACIO Polity Topic	IB ACIO Polity Study Notes PDFs
Indian Polity	Indian Polity and Governance Notes
Important Articles of the Constitution	Important Articles of the Constitution
Features of Constitution	Features of Constitution
Fundamental Rights & Duties	Fundamental Rights & Duties
Directive Principles & State Policies (DPSP)	Directive Principles & State Policies (DPSP)
Indian Constitution: President of India	Indian Constitution: President of India
Indian Constitution: Parliament	Indian Constitution: Parliament
Judiciary System of India	Judiciary System of India
Constitutional Bodies	Constitutional Bodies
Non-Constitutional Bodies	Non-Constitutional Bodies
Indian Constitution: Chief Minister & Council of Ministers	Details about Chief Ministers; Organization & Composition of State Legislature
Indian Constitution: Governor	Indian Constitution: Governor

Check out IB ACIO News.

IB ACIO Study Materials 2025: Download Science Study Notes PDFs

Science questions are asked in the Tier 1 of the IB ACIO Exam. Students can watch the above playlist and study Lucent Science for preparation.

IB ACIO Study Material 2025: Download Study Notes for Current Affairs

Current affairs form an important part of the IB ACIO written exam. Students can go through the above playlist to study daily the Hindu current affairs. To study daily important current affairs, students can also go through- Daily News Analysis and Current Affairs for & State PSCs in PDF.

IB ACIO Study Material 2025: Download Study Notes for Static GK

The General Knowledge part contains questions from a varied range of topics. Questions may include topics such as India’s Firsts, Books and Authors, Indian Cities, Famous Personalities, Important Dates, Sports, etc.

The following table contains some of the important study notes for the Static GK Section that aspirants must consider going through while preparing for the IB ACIO Exam.

IB ACIO Static GK Topics	IB ACIO Static GK Study Materials PDFs
Firsts in India	Firsts in India
Highest, Tallest, Smartest and Largest in India	Highest, Tallest, Smartest and Largest in India
Indian Cities	List of Indian Cities and their Nicknames
Famous Personalities in India	Famous Personalities in India
Books and Authors	Books and Authors
Important Days	Important Days

Students can best prepare for the IB ACIO using the above-provided study material. The IB ACIO is one of the best opportunities to serve in the Intelligence services like IB, RAW, NTRO, etc.

FAQs

Ques. Can I crack IB ACIO with 3 months of preparation?

Ans. 3 month is more than enough to clear the IB ACIO Exam. However, it requires a preparation strategy and sources. During the first two students can cover the Aptitude and General Studies syllabus and during the last one month, prepare English and Current Affairs.

Ques. Is English necessary for the IB ACIO Exam?

Ans. Yes, English is indeed important when you are preparing for the IB ACIO Exam. Basic questions on English will be asked in the Tier 1 of the exam and A descriptive English test will be there in the Tier 2 of the IB ACIO Exam.

Ques. How to prepare for the GK Section of the IB ACIO?

Ans. GK is a very wide topic. The section contains questions on various topics such as science, history, geography, etc. Candidates can refer to the notes provided here to prepare for the GK Part of the IB ACIO Exam.

Ques. How many attempts are permitted in the IB ACIO exam?

Ans. There is no limit on the number of attempts for the IB ACIO Exam. The candidates can appear any number of times, given that they fulfil the eligibility and age criteria.

Ques. How to prepare for the IB ACIO Numerical Ability Section?

Ans. Numerical Ability is one of the most scoring topics of the IB ACIO Exam. Students should go through each topic in the Numerical Ability/Quant section and prepare and practice it well.