# Pk Notes > Notes for Every Discipline ## Posts - [Chemistry Class 9 Unit 5 Chemical Bonding Exercise](https://pknotes.org/chemistry-class-9-unit-5-chemical-bonding-exercise/): Grade 9 Chemistry Review Chemistry Class 9 Unit 5: Exercise Questions and Answers Part 1: Bonding & Charge I State octet and duplet rules. Octet Rule: Atoms react to achieve eight electrons in their outermost shell for stability. Duplet Rule: The lightest atoms (H, Li, Be) react to achieve two electrons in their outermost shell, like He. II Explain formation of covalent bond between two nitrogen atoms. Two nitrogen atoms N each need 3 more electrons. They achieve this by sharing three pairs of electrons, resulting in a strong triple covalent bond (N≡N). This sharing gives both N atoms a ... Read more - [Class 9 Chemistry – Chapter 4: Short-Response Questions (SRQs)](https://pknotes.org/class-9-chemistry-chapter-4-short-questions-pdf-download/): Looking for Class 9 Chemistry Chapter 4 notes and short questions? Don’t worry, PkNotes has got you covered! Here are some short-response questions (SRQs) to help you practice and revise the key concepts easily. Short Question Periodicty of Properties Metallic Character, Density and Reactivity - [Chemistry Class 10 Chapter 4 Electrochemistry Notes FBISE NBF PDF](https://pknotes.org/chemistry-class-10-chapter-4-electrochemistry-notes-fbise-nbf-pdf/): We have uploaded the solution of the exercise for Chemistry Class 10, Chapter 4: Electrochemistry. These solutions are based on the National Book Foundation textbook, which is the new book recommended by FBISE according to its latest curriculum. In addition to the exercise solutions, we have also added a “Test Yourself” button below the PDF. Students can use this feature to test their knowledge of the questions covered in the uploaded PDF. The MCQs in the Test Yourself section are specifically designed based on the content of the provided PDF, ensuring that students get relevant and focused practice. Short Questions ... Read more - [GAT Mock Test](https://pknotes.org/gat-mock-test/): Gat Mock Test GAT Mock Test Start Your Exam How many total questions do you want? Start Exam - [Class 10 Chemistry Important topics | Guess Paper 2025 FBISE](https://pknotes.org/class-10-chemistry-important-topics-guess-paper-2025-fbise/): Here are the most important topics for the FBISE Class 10 Chemistry exam, compiled from PkNotes as a guess paper. Focus on key concepts like acids and bases, salt formation, combustion, and halogenation of alkenes. Don’t miss the Solvay process and the distinction between soft and hard water with hardness removal methods. Practice calculating equilibrium constant () and mastering pH and pOH numericals. Study organic compound classification, acid rain effects, and functional groups, including IUPAC naming. Also, prepare for tests like the Baeyer and bromine water tests, air pollution sources, and concentration methods. Mastering these topics ensures exam success! - [Class 10 Chemistry Chapter 12 Notes FBISE | Solved Exercise](https://pknotes.org/class-10-chemistry-chapter-12-notes-pdf-fbise-solved-exercises/): Greetings students Pknotes is here to provide you with Class 10 Chemistry Chapter 12 (Hydrocarbon) Notes Solved Exercises which is aligned with Federal board curriculum. The solved exercise is taken from National Book Foundation Textbook. Also download these notes in PDF Format. Chapter 11 Solved Exercise - [Class 9 Math Chapter 6 Exercise 6.5 Notes FBISE | NBF](https://pknotes.org/class-9-math-chapter-6-exercise-6-5-notes-fbise-nbf/): Greetings Students! Pknotes is here to provide you with the complete solution of class 9 math chapter 6 Exercise 6.5 notes, these notes are according to the new curriculum provided by Federal Board, are the solved exercise is from the textbook of National Book Foundation. For a visual learning you can visit our YouTube Channel. These notes are available for you in PDF format as well. Class 9 Math Exercise 6.5 - [Class 10 Chemistry Chapter 11 solved exercise FBISE | PDF Download](https://pknotes.org/class-10-chemistry-chapter-11-solved-exercise-fbise-pdf-download/): Hello Students! Pknotes is here to provide you with complete class 10 chemistry chapter 11 solved exercise. These solved questions are specifically designed for students preparing for the FBISE Chemistry 10 exam. The solutions are based on the National Book Foundation textbook.These notes include solution of short questions, long questions and think tanks. If you’d like to learn how to solve these exercises in a more visual and practical way, feel free to check out our YouTube Channel Chapter 11 (Organic Chemistry) Solved Exercise - [Class 9 Math Chapter 5 Exercise 5.3 Notes NBF | FBISE | PDF](https://pknotes.org/class-9-math-chapter-5-exercise-5-3-notes-fbise-nbf/): Welcome Students! Pknotes have provided you with detail step by step solution of Class 9 Math Chapter 5 Exercise 5.3 notes. These solution provided in these downloadable PDF notes is according to the curriculum of FBISE and notes are taken from the National Book Foundation Textbook. For a more detail solution on solving these notes you can find that on our YouTube Channel. Class 9 Exercise 5.3 - [Class 9 Math Chapter 5 Exercise 5.2 Notes NBF | FBISE | PDF](https://pknotes.org/class-9-math-chapter-5-exercise-5-2-notes-fbise-nbf-pdf/): Welcome Students! Pknotes has provided you with class 9 math chapter 5 exercise 5.2 notes which are according to the curriculum provided by Federal Board, and the exercise 5.2 class 9 is taken from the National Book Foundation Textbook, For your ease you can also download our handwritten notes as well, having difficulty understanding the concepts of this exercise, no worry you can visit our YouTube Channel for detailed video lectures. Class 9 Exercise 5.2 Basic Concept Two types of equation are studied in this exercise Radical Equation An equation in which the unknown variable appears under the radical sign ... Read more - [Class 9 Math Chapter 5 Exercise 5.1 Notes NBF | FBISE | PDF](https://pknotes.org/class-9-math-chapter-5-exercise-5-1-notes-fbise-nbf/): Greetings Students! Pknotes have provided you with detail step by step solution of Class 9 Math Chapter 5 Exercise 5.1. These solution provided in these downloadable PDF notes is according to the curriculum of FBISE and notes are taken from the National Book Foundation Textbook. For a more in-depth tutorial on solving these notes you can find that on our YouTube Channel Class 9 Exercise 5.1 Notes - [Class 9 Math Chapter 4 Exercise 4.3 Notes NBF | FBISE | PDF](https://pknotes.org/class-9-math-chapter-4-exercise-4-3-notes-fbise-nbf/): Greetings, Students! Pknotes, have provided you with detail Class 9 Math Chapter 4 Exercise 4.3 notes aligned with FBISE curriculum and the exercise is taken from National Book Foundation Textbook. You can also download these notes in PDF format. If you struggle learning how to understand this exercise then you can watch detail lectures of this exercise in our YouTube Channel. Factorization Exercise 4.3 Practice Questions Following are the list of questions which students can practice. - [Class 9 Math Chapter 4 Exercise 4.2 Notes NBF | FBISE | PDF](https://pknotes.org/class-9-math-chapter-4-exercise-4-2-notes-fbise-nbf/): Welcome, Students! PKnotes has provided detailed notes on Class 9 Math Chapter 4 Exercise 4.2. These notes are according to the curriculum provided by FBISE and are according to the National Book Foundation Textbook. These notes cover every question, and you can follow them for a better understanding. For future reference, you can download these notes in PDF format. For a practical understanding of this exercise, visit our YouTube channel. Factorization Exercise 4.2 Notes - [Class 9 Math Chapter 4 Exercise 4.1 Notes NBF | FBISE | PDF](https://pknotes.org/class-9-math-chapter-4-exercise-4-1-notes-fbise-nbf/): Hi Students! Here at Pknotes, we have provided detailed notes on Class 9 Math Chapter 4 Exercise 4.1. By following these step-by-step solutions, you can easily understand the concepts of factorization. These notes are available in PDF format, so you can download them for offline study as well. For detail step by step solution of this exercise visit our YouTube Channel. Factorization Exercise 4.1 Notes - [Chemistry Class 10 Guess Paper ( Chapter Wise)](https://pknotes.org/chemistry-class-10-guess-paper/): Hi Students! Pknotes has prepared a chapter-wise Chemistry Class 10 Guess Paper just for you. These guess papers are created based on past exam trends, helping you focus on key topics. Plus, you can easily download them in PDF format for easy study anytime.  Chemistry Guess Paper( Chapter – wise ) Chemical Equilibrium Guess Paper 1 Acid, Bases and Salts Short Question Answers Organic Chemistry Toggle Content Hydrocarbons Toggle Content Biochemistry Toggle Content Water Toggle Content Atmosphere Toggle Content Chemical Industries - [Class 9 Chemistry Chapter 3 Notes Solved Exercise | FBISE](https://pknotes.org/class-9-chemistry-chapter-3-notes-solved-exercise-fbise-pdf/): At pknotes.org, we have provided you with  Class 9 Chemistry Chapter 3 Notes Solved Exercise which are according to the curriculum provided by FBISE (Federal Board of Intermediate and Secondary Education), these notes are from the grade 9 chemistry of National Book Foundation. Visit our YouTube Channel for more video lectures. Atomic Structure Solved Exercise Chemistry Class 9 Chapter 3 Short Question Answers (i) Distinguish between shell and sub-shell. (ii) Why is an atom electrically neutral? An atom is electrically neutral because the number of protons (positive charges) is equal to the number of electrons (negative charges). The opposite charges balance each other, resulting in ... Read more - [Class 9 Math Exercise 4.3 Notes | FBISE | NBF | PDF](https://pknotes.org/class-9-math-chapter-4-notes-exercise-4-3-fbise-nbf/): Looking for Class 9 Math Exercise 4.3 notes? These Handwritten notes are specifically designed for FBISE students, You can also explore more resources at pknotes.org for additional study materials and notes. You can also visit our YouTube Channel for more detailed video lectures. Class 9 Exercise 4.3 Notes Key Concepts of Exercise 4.3 This exercise is mainly based on HCF, the SLO’s for this Exercise are below. HCF (Highest Common Factor): The abbreviation of HCF is Highest Common Factor, in simple term if we factorize two or more algebraic expressions and find out the greatest common factor among them then ... Read more - [Class 9 Chemistry Chapter 1 Solved Exercise PDF FBISE](https://pknotes.org/class-9-chemistry-chapter-1-solved-exercise-fbise-pdf/): Welcome to pknotes.org, If you’re a looking for Class 9 Chemistry Chapter 1 Solved Exercise according to the curriculum provided by FBISE (Federal Board of Intermediate and Secondary Education), you’re in the right place. Here our teachers have provided you with the quality notes, these notes are from the grade 9 chemistry of National Book Foundation. Visit our YouTube Channel for more video lectures. Nature of Science in Chemistry Solved Exercises Class 9 Chemistry Chapter 1 Exercise Solution 1. How does chemistry help a doctor to know about the chemical nature of medicine? Chemistry enables doctors to understand the molecular ... Read more - [Chemistry Class 10 Notes FBISE | Download PDF](https://pknotes.org/chemistry-class-10-notes-fbise-pdf-download/): At pknotes.org we have provided with up to date Chemistry Class 10 Notes on curriculum provided by FBISE. These notes have been prepared from the National Book Foundation’s Text Book. A total of 8 chapters are there in this textbook. We have covered in detailed the self assessment question, important short questions, long questions and exercises and think tank of each and every chapter. Visit Our YouTube Channel for more video lectures Class 10 Chemistry NotesNational Book Foundation Chemical Equilibrium Short Question Answers Acid, Bases and Salts Short Question Answers Organic Chemistry Toggle Content Hydrocarbons Toggle Content Biochemistry Toggle Content Water Toggle Content Atmosphere Toggle Content ... Read more - [Class 10 Chemistry Chapter 2 Notes FBISE | PDF Download](https://pknotes.org/class-10-chemistry-chapter-2-notes-fbise-pdf-download/): Looking for Class 10 Chemistry Chapter 2 Notes on Acids, Bases, and Salts? At pknotes.org, we provide detailed, easy-to-understand notes in PDF format to help you understand important concepts and ace your exams. Visit our YouTube Channel For more video lectures Acid, Base and Salts Short Question and Answers Topical Questions with their answers. Topic: Bases and Their Properties Topic: pH Scale and Indicators Topic: Neutralization Reactions HCl (acid)+NaOH (base)—-→NaCl (salt)+H2​O Topic: Salts and Their Formation HCl (acid)+NaOH (base)—-→NaCl (salt)+H2​O Topic: Strong and Weak Acids and Bases Common Industrial Uses of Acids, Bases, and Salts Important Short Questions. - [](https://pknotes.org/class-9-chemistry-notes-nbf-pdf-download/): Class 9 Chemistry Notes NBF PDF Download ☰ Chapters Class 9 Chemistry Notes (NBF) FBISE aligned notes with solved exercises, SLO-based Q&A, and exam prep 📘 Chapters Chapter 1: Fundamentals of Chemistry Chapter 2: Structure of Atoms Chapter 3: Periodic Table Chapter 4: Stoichiometry Chapter 5: Chemical Bonding Chapter 6: Solutions Chapter 7: Electrochemistry Chapter 8: Chemical Equilibrium Chapter 9: Environmental Chemistry Chapter 1: Fundamentals of Chemistry Short Questions Important short questions with answers for Chapter 1. Long Questions Detailed explanations of long questions from Chapter 1. Exercises Solved exercises from the textbook (Chapter 1). © 2025 PKNotes.org | All ... Read more - [Class 9 Federal Board Books | NBF Books Pdf Download](https://pknotes.org/class-9-national-book-foundation-books-pdf-download/): Chemistry Class 9 National Book Foundation Textbook The new Chemistry textbook for Class 9 by the National Book Foundation offers comprehensive coverage of fundamental concepts of chemistry and practical assessments. This book will help students to understand and clarify their doubts through detailed explanations and exercises. It includes a total of 17 chapters, introducing students to the basics of chemistry and its various branches. As students progress through the chapters, they will gain a more in-depth knowledge about chemistry  Download Chemistry Textbook Download Chemistry Notes Math Class 9 National Book Foundation Textbook Download Math Textbook Download Math Notes Physics Class ... Read more - [Class 9 Math Ex 2.2 Notes PDF Download National Book Foundation](https://pknotes.org/class-math-ex-2-2-notes-federal-board-pdf-download/): We at Pknotes have provided you with the most comprehensive class 9 math ex 2.2 notes which are according to the curriculum provided by FBISE The Notes provided here are from the book by the national book foundation. Ex 2.2 covers basic topics of logarithms and Exponents. A total of 4 questions are provided by National book foundation. Each Question is different in its own way. In initial questions we have to convert the given questions from logarithmic form to Exponential Form and vice versa, after that we have to find the values of unknown variables in the next questions. ... Read more - [Class 9 Math Ex 2.1 Notes FBISE PDF -National book foundation Download](https://pknotes.org/class-9-math-ex-2-1-notes-fbise-pdf-download/): We at Pknotes have provided you with the most comprehensive class 9 math ex 2.1 notes which are according to the curriculum provided by FBISE. Class 9 Math Exercise 2.1 Notes Ex 2.1 Class 9 Video Lecture If you are a can't understand from our notes then you can Learn from the video provided below.For more content like this you can visit our Youtube Channal Topics Covered in Math Class 9 Ex 2.1 This Exercise is an introductory exercise of unit 2 of class 9 maths, the name of this unit is Logarithms. Initially before jumping in to logarithms we ... Read more - [Class 9 Math Notes Federal Board | PDF Download](https://pknotes.org/math-class-9-notes-national-book-foundation-pdf/): Online Math Tutor Looking for Online Math Tutor?Leave a DM at Instagram at @jee_omer × Dismiss this alert. Math Class 9 Notes Federal Board National Book Foundation We at pknotes have provided you with these math class 9 notes which are according to the updated curriculum provided by the Federal Board of Intermediate and Secondary Education (FBISE). These notes contains all the solved exercises of the national book foundation, Which cover’s every single topic in detail. If you are a visual learner and you learn from YouTube then we also have a YouTube Channel of ours which you can visit to ... Read more - [Math Class 9 Exercise 1.3 Notes National book foundation](https://pknotes.org/math-class-9-exercise-1-3-noted-nbf/): Welcome to Pknotes, Here we have provided you with Handwritten notes of Math class 9 Exercise 1.1.These notes are written in a manner through which every students can understand weather they are weak in studies of they are exceptionally well in academics. If you are a visual learner than you can visit our youtube channel through which you can easily understand the concepts used in this exercise Real Numbers Exercise 1.3 Nbf Class 9 Math chapter 1 Exercise 1.3 These handwritten notes are comprehensivly writtten by subject specialist, So we assure you that these notes are good for you.There are ... Read more - [Chemistry Class 10 Chapter 2 Notes](https://pknotes.org/chemistry-class-10-chapter-2-notes/): We have provided you with the best chemistry class 10 chapter 2 notes for federal board. We also have discussed the important questions as well which have been repeated in the board exams multiple times. We also have tried our best to deeply explain each question and clear the concepts of students. If students find difficulty in learning through these notes then they can visit our YouTube Channel for learning through visual aids. Acid Base and Salts Chemistry Class 10 Chapter 2 Short Answer 1: Describe some important properties of acid and bases.  PROPERTIES OF ACID: PROPERTIES OF BASES: 2: ... Read more - [Exercise 5.1 Class 9 Notes](https://pknotes.org/exercise-5-1-class-9-notes/): Here we have provided you with the best math class 9 exercise 5.1 notes. Exercise 5.1 of class 9 is an introductory exercise of one of the most important topic in mathematics. Topic used in this exercise are listed below. Content of Exercise 5.1 class 9 This exercise consists of 5 main questions consisting of 4-6 parts in each question.All of these questions are related to basics of factorization.In every question we need to factorize the given algebric expression.Initial questions are easy and beginners can quickly solve them as we go further the questions becomes difficult. If you can clearly ... Read more - [Class 10 Chemistry Chapter 1 Notes Fbise Pdf Download](https://pknotes.org/class-10-chemistry-chapter-1-notes-fbise-pdf-download/): Here at pknotes you will find class 10 chemistry chapter 1 notes, Chemical Equilibrium.These notes are according to the syllabus provided by the Federal Board.You can visit our Youtube Channel for more detailed lectures.Topic include in this chapter are below. Chemistry Class 10 Chapter 1 Notes Pdf These above mention chemistry class 10 chapter 1 notes can be easily downloaded into pdf format to use when you don't have access to the internet. These notes also include important questions and Solved exercises. Some important questions are discussed below.  Why Reversible reactions never go to completion? Reversible reactions never go to ... Read more - [Math Class 10 Exercise 5.1 Notes](https://pknotes.org/math-class-10-exercise-5-1-notes/): looking for  Math Class 10 Exercise 5.1 Notes.We at pknotes provide the best handwritten notes out their for this specific topic. Math Class 10 Sets And Function Exercise 5.1  Handwritten Notes     These Notes have been compiled by subject specialist of Maths who has been teaching maths from the past 5 year’s.These Notes of class 10 math have helped different student’s across the country to ace their exams and gain knowledge.These Notes follow the Updated Syllabus provided By Federal Board of intermediate and secondary education (FBISE) as well as other different Boards all across Pakistan. This Exercise is Purely ... Read more - [Class 10 Math Notes](https://pknotes.org/class-10-math-notes/): looking for Class 10 Math Notes Don’t worry, Here at PkNotes we have provided you the complete guided solution of all exercises of math class 10.We have covered all the units in detail and explain all of the concepts in handwritten notes.There are total 13 units in math class 10 out of which 7 are exercise based and remaining 6 are theorem of circle.If you don’t understand these concepts just by looking at them.We also have a YouTube Channel Where we have covered in detail about these topics Math Class 10 Notes (Handwritten) Unit 1 OverviewExercise 1.1Exercise 1.2Exercise 1.3Exercise 1.4Exercise 1.5Exercise 1.6Review ExerciseMCQ’s Unit 2 OverviewExercise ... Read more - [Class 10 Math Exercise 3.5 Notes](https://pknotes.org/class-10-math-exercise-3-5-notes/): Looking for the solution of Class 10 Math Exercise 3.5, Then worry not here at PkNotes we have provided complete solution of the exercise with step by step explaination. Variations (Class 10 Math Exercise 3.5) Her We have provided you with the solution of each Question and have convered each topic which you need in order to succeed. If you are not a learner who learns by seeing then we have also solved this exercise on our youtube channal which you can visit to deeply learn about math class 10 exercise 3.5.   - [Math Class 9 Notes](https://pknotes.org/math-class-9-notes/): Looking for the best math class 9 notes Available.Don’t worry then. Here you can Find the best handwritten well detailed and structured notes for all the units of class 9 math. All the notes are prepared by specialist of each subject.We also provide with the best tips and tricks to Ace Your Board Exams. We have 20 year’s of Experience in teaching and have good grasp of each topic. We Have the best math class 9 notes. Following are the list of all the Units of Math Class 9. Algebraic formulas for class 9: Before even learniing how to solve ... Read more - [Mathematics Class 9th Exercise 1.1 Fbise Notes Pdf Download](https://pknotes.org/mathematics-class-9th-exercise-1-1-nbf-fbise-notes-pdf/): We at pknotes.org have provided you with these mathematics class 9th exercise 1.1 Notes which are according to the updated curriculum provided by the Federal Board of Intermediate and Secondary Education (Fbise).These notes have got you covered with solutions to Exercise 1.1 from the National Book Foundation for Class 9th. If you are a visual learner and you learn from youtube then we also have a Youtube Channel of ours which you can visit to see detailed lectures of math class 9 Class 9th Math Exercise 1.1 Suppose you don’t have internet connection and you eagarly want our notes so we came with a ... Read more ## Pages - [Class 10](https://pknotes.org/class-10/) - [Class 11](https://pknotes.org/class-11/) - [Class 12](https://pknotes.org/class-12/) - [Class 10 Notes | Fbise | NBF | PDF | Download](https://pknotes.org/class-10-notes-fbise-nbf-pdf-download/) - [Pknotes](https://pknotes.org/): Pknotes – Class 9, 10, 11, 12 Pknotes Class 9, 10, 11, and 12 Explore Now Recent Posts Class 10 Chemistry Chapter 4 Electrochemistry Solved Exercise GAT Mock Test Class-Wise Notes 📘 Class 9 Notes, Online Tests, Test Papers, Textbooks, Guess Papers Explore 📗 Class 10 Notes, Online Tests, Test Papers, Textbooks, Guess Papers Explore 📙 Class 11 Notes, Online Tests, Test Papers, Textbooks Explore 📕 Class 12 Notes, Online Tests, Test Papers, Textbooks Explore Our Teaching Services We offer online tutoring for Math and Chemistry for Grades 9-12. Get personalized guidance and boost your grades! Contact us via Instagram ... 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Proin gravida nibh vel velit auctor aliquet. Aenean sollicitudin, lorem quis bibendum auctor, nisi elit consequat ipsum, nec sagittis sem nibh id elit. Duis sed odio sit amet nibh vulputate cursus a sit amet mauris. Morbi accumsan ipsum velit. Nam nec tellus a odio tincidunt auctor a ornare odio. Sed non mauris vitae erat consequat auctor eu in elit. Class aptent taciti sociosqu ad litora torquent per conubia nostra, per ... Read more - [Home](https://pknotes.org/home-2/): Pknotes Class 9, 10, 11, 12 Class wise Notes Class 9 Notes Class 10 Notes Class 11 Notes Class 12 Notes - [Class 9 Notes | NBF Federal Board | PDF Download](https://pknotes.org/class-9-notes-npf-federal-board-pdf-download/): Class 9 Subjects Explore notes, quizzes, and solved exercises for each subject Here at Pknotes.org we have compiled up all the Class 9 Notes of each subject which are according to the curriculum provided by the Federal Board and all notes cover the books provided by National Book Foundation. Visit Our Youtube Channel for more detailed video lectures. These Notes provide a detailed overview of the Class 9 Math Curriculum which is up to date and covers the syllabus provided by FBISE. Subjects Offered Mathematics Formulas, solutions, and exercises. Physics Concepts and numerical problems. Chemistry Reactions and atomic structure. English ... Read more - [About Us](https://pknotes.org/about-us/): Welcome to PKNotes, where handwritten notes steal the spotlight! At PKNotes, we love the charm of writing things down on paper. In a world full of typing and screens, we want to bring back the joy of pen and paper. PKNotes started because we all share a love for the special feeling that comes with handwritten notes. 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