The Ultimate Student Performance & Well-being Toolkit | Chemca

TOOLKIT

The Ultimate Student Performance & Well-being Toolkit 🚀

Stop guessing why your grades are stuck. Start analyzing the data. Smart, measurable, and actionable tests for JEE/NEET/University aspirants.

Why this toolkit?

Are you studying long hours but not seeing improvement? Success in competitive exams isn't just about time — it's about optimization. These tools audit your study methods, mindset, sleep, nutrition, and time usage to give data-driven recommendations you can act on today.

Tip: Use Desktop mode in mobile browsers for the best interactive experience.

Explore Your Personal Analysis Tools

Be honest with answers — accuracy of output depends on truthful inputs. Each test produces an individualized action plan.

🧠 Mental Well-being Check

Quick psychometric assessment measuring stress, anxiety, and social connectedness — with coping strategies and study-schedule suggestions.

Open Test

🏆 Exam Mindset & Resilience Test

Designed for entrance aspirants to detect exam fear and performance pressure, and provide mental rehearsal routines & confidence exercises.

Open Test

⏳ Time Leakage Audit

Discover exact sources of wasted time during class and self-study. Get a minute-by-minute remediation plan to recover 1–3 hours/day.

Open Audit

📚 Study Method Pathology

Find out if you are actively learning or passively reading. Recommended changes in note-taking, spaced repetition and problem selection included.

Open Audit

🧬 Bio-Engine Health Audit

Analyze sleep, diet, hydration and posture. Learn small biological changes that improve concentration and memory consolidation.

Open Audit

💬 Emotional Ecosystem Analyzer

Maps your support system, stress triggers and coping habits — actionable social and emotional strategies for exam season.

Open Analyzer

🗂️ Revision Planner (JEE/NEET)

Personalized revision schedules based on chapter-completion, weak areas and upcoming test dates. Exportable to Google Calendar.

Open Planner

How to use this toolkit (3-step plan)

1. Choose 2–3 tests that feel most relevant today (e.g., Time Leakage + Bio-Engine).
2. Complete them honestly and note the top 3 recommendations per test.
3. Implement the recommendations for 7 days and track metrics (study hours, tests, accuracy).

Quick wins you can do today

• Turn on "Do Not Disturb" for study blocks & enable airplane mode while solving PYQs.
• Follow a consistent sleep schedule (same wake-up & sleep times for 7 days).
• Use active recall: 30 min testing + 15 min review rather than 2 hours passive reading.

Frequently Asked Questions

Are these tests free to use?

Yes — all core audits linked above are free on Chemca. Some downloadable planners or PDFs may require a signup.

How accurate are the recommendations?

They are algorithmic suggestions based on behavioral and psychometric inputs. Their value depends on honest responses and follow-through.

Can I export revision plans to Google Calendar?

Yes — the Revision Planner supports export to Google Calendar and printable PDF schedules.

Ready to upgrade your brain's performance? Choose a test above and start a 7-day experiment. Track results and iterate.

Published by Chemca - Chemistry Made Easy. If you found this helpful, share on WhatsApp or Telegram and help a friend improve.

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Chemistry Class Notes – JEE, NEET, CBSE | Quick Revision

Chemistry Class Notes – JEE, NEET, CBSE | Quick Revision by CHEMCA

Access chapter-wise Chemistry class notes (downloadable PDFs) for Class 11 & 12, JEE and NEET preparation. Each chapter link opens the Google Drive file/folder where you can view or download notes and revision sheets. Use the buttons below (labeled with chapter names) to quickly open the required PDF.

Category: Class Notes

Subjects: Organic | Inorganic | Physical

Updated: 2025

Download Chapter Notes (Tap to Open / Download)

1. Biomolecules

Concise notes and revision charts on biomolecules — proteins, carbohydrates, lipids & nucleic acids.

Open / Download

2. Hydrocarbons-1

Introductory hydrocarbons: nomenclature, reactions, and examples.

Open / Download

3. Hydrocarbons-2

Advanced reactions and mechanisms for hydrocarbons.

Open / Download

4. Hydrocarbons-3

Detailed mechanisms, examples and practice problems.

Open / Download

5. Amines-1

Basic properties, nomenclature and reactions of amines.

Open / Download

6. Amines-2

Advanced amine reactions and synthetic applications.

Open / Download

7. Coordination Compounds

Ligands, coordination number, bonding and examples.

Open / Download

8. General Organic Chemistry (Folder)

Collection: reaction mechanisms, reagents and basics of organic chemistry.

Open Folder

9. Hydrocarbons (Detailed)

Extensive notes and solved problems on hydrocarbons.

Open Folder

10. Some Basic Concepts of Chemistry

Fundamentals, mole concept and quick revision notes for beginners.

Open Folder

11. Atomic Structure

Electronic configuration, quantum numbers and models.

Open Folder

12. Periodic Classification of Elements

Trends, periodic properties and important exceptions.

Open Folder

13. Chemical Bonding

Valence bond theory, hybridization and molecular orbital basics.

Open Folder

14. States of Matter

Gases, liquids, solids and kinetic theory summaries.

Open Folder

15. Thermodynamics

Entropy, enthalpy, spontaneity and related problems.

Open Folder

16. Chemical & Ionic Equilibrium

Equilibrium constants, Le Chatelier's principle & solved examples.

Open Folder

17. Haloalkanes & Haloarenes (Detailed)

Nucleophilic substitution, mechanisms and practice questions.

Open Folder

18. Aldehyde, Ketone & Carboxylic Acid

Mechanisms, reagents and key reactions for exams.

Open Folder

19. Alcohol, Phenol & Ether

Preparation, properties and reactions with solved examples.

Open Folder

20. Amines

Comprehensive notes on amines (basic to advanced).

Open Folder

21. Surface Chemistry (Adsorption & Catalysis)

Key concepts, catalysts and examples for NEET & boards.

Open Folder

22. Solutions

Concentration units, colligative properties and problems.

Open Folder

23. Solid State

Crystal systems, packing and defects — concise notes & problems.

Open Folder

24. Electrochemistry

Galvanic cells, electrode potentials and numerical practice.

Open Folder

25. Chemical Kinetics

Rate laws, order of reactions and solved questions for practice.

Open Folder

26. Coordination Compounds (IUPAC Nomenclature)

IUPAC rules, naming practice and examples (PDF).

Open / Download

27. Polymers

Types, polymerization methods and key definitions for quick revision.

Open / Download

28. Redox Reaction

Oxidation numbers, balancing redox reactions and examples.

Open Folder

Note: Each button opens the Google Drive file/folder in a new tab. From Drive you may preview or download the PDF. If a folder is opened, look for the PDF file inside and use the Drive menu to download.

How to use these notes

Prefer a quick revision? Download the formula sheet for each chapter and practice the PYQs listed inside. For exam practice, attempt the mock tests available under Practice Tests.

Published by CHEMCA • For corrections or new uploads, contact us.

Quiz Revision Notes Downloads Class Notes Video Lectures

Free Chemistry Books & Notes by Sudhir Nama (IITB) (Guest Post)

Free Chemistry Books & Notes by Sudhir Nama (IITB)

We are happy to host a collection of high-quality Chemistry books and notes generously shared by Sudhir Nama, a respected Chemistry Lecturer and author.

About the Author

Sudhir Nama, a Chemistry Lecturer and author specialising in Organic Chemistry from IITB. With over 10 years of teaching experience, He follows a clear, interactive, and student-centred approach to help learners truly understand and enjoy Chemistry.
He has authored multiple academic and competitive exam books for students preparing for the NEET, JEE, CSIR-NET, GATE, IIT-JAM, BHU, and MSc Chemistry exams.

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📘 Free Books & Notes (Download Links)

1. Coordination Chemistry On Fingertips

For JEE Advanced, CSIR-NET, IIT-JAM, MSc & GATE
Download

2. Pericyclic Reactions and Rearrangements

For MSc, CSIR-NET, GATE, IIT-JAM
Download

3. Name Reactions and Rearrangements

For IIT-JAM, JEE Advanced, CSIR-NET, GATE, BHU, MSc & competitive exams
Download

4. Vijay Sankhnaad — A Personal Mentor & Exam Guide

For NEET & JEE students
Download

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📩 Contact the Author

Email: Contact@sudhirnama.in
Website: www.Sudhirnama.in

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Haloalkanes Test 20 Q ( JEE/NEET)

 

Alkyl Halides Practice Quiz

JEE / NEET Pattern | +4 for correct, −1 for wrong, 0 for unattempted

Types of Fire & How to Extinguish Them (Class A, B, C, D, K/F Explained)

Fire is a chemical reaction — specifically rapid oxidation — that releases heat, light, and various reaction products. But not all fires are the same. Understanding the type of fire is essential because using the wrong extinguishing method can make the fire worse or even explode.

Every fire requires three key components (Fire Triangle):

• Fuel
• Heat
• Oxygen

Extinguishing a fire means removing any one of the three.

Let’s break down the major fire classes and how to handle them safely.

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🔥 Class A Fire – Solid Combustible Materials

Examples

• Wood
• Paper
• Cloth
• Rubber
• Plastic (common household plastics)

How they burn

These materials undergo pyrolysis — they break down into volatile gases that burn in oxygen.

How to extinguish Class A Fires

1. Water (most effective)
   • Cools the burning material below ignition temperature.
2. Foam extinguishers
   • Smother and cool simultaneously.
3. Dry chemical extinguishers (ABC type)
   • Work by interrupting the chemical reaction.

🚫 Do NOT use:

• CO₂ alone (ineffective outdoor; fire may re-ignite)
• Dry sand (very slow)

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🔥 Class B Fire – Flammable Liquids

Examples

• Petrol
• Diesel
• Kerosene
• Paint
• Alcohols
• Oils & solvents

How they burn

Flammable liquids burn in their vapours, not the liquid itself.

How to extinguish Class B Fires

1. Foam extinguishers (AFFF)
   • Create a foam blanket and cut off oxygen.
2. CO₂ extinguishers
   • Displace oxygen; good for labs, kitchens, and workshops.
3. Dry chemical powder (DCP/ABC)
   • Interrupt chemical reaction and smother vapours.

🚫 Never use water

Water spreads the liquid → fire becomes bigger.

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🔥 Class C Fire – Flammable Gases

Examples

• LPG
• CNG
• Propane
• Methane
• Hydrogen
• Acetylene

How they burn

Gas leaks create explosive mixtures with air. Ignition causes rapid combustion or explosion.

How to extinguish Class C Fires

1. Shut off the gas supply immediately (most important).
2. Use CO₂ or Dry Chemical Powder extinguishers.
3. Cool nearby objects using water spray to prevent re-ignition.

🚫 Do NOT use:

• Water jet (can spread burning gas flame)
• Foam

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🔥 Class D Fire – Combustible Metals

Examples

• Sodium
• Magnesium
• Potassium
• Aluminium
• Titanium
• Lithium batteries (partial overlap with electrical fires)

How they burn

These metals burn at very high temperatures and react explosively with water.

How to extinguish Class D Fires

1. Special Class-D dry powder extinguishers

   • Sodium chloride-based
   • Graphite powder
   • Copper powder
     These smother and absorb heat.

2. Cover with dry sand (only if no extinguisher available).

🚫 Never use

• Water (causes explosion)
• Foam
• CO₂

These can all react violently with burning metals.

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🔥 Class E / Electrical Fires (Now Considered a Source, Not a Class)

Examples

• Short circuits
• Overloaded wires
• Burning computers, appliances, switches

How to extinguish

1. Turn off the main power supply.
2. Use CO₂ extinguishers.
3. Use ABC Dry Chemical Powder extinguishers.

Why not water?

Water conducts electricity → risk of electrocution.

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🔥 Class K / Class F Fire – Cooking Oils & Fats (Kitchen Fires)

Examples

• Hot oil
• Deep fryer fires
• Ghee/oil catching fire during frying

How they burn

Superheated oils reach auto-ignition temperature and self-ignite.

How to extinguish Class K/F Fires

1. Wet chemical extinguishers (Potassium acetate)
   • Create a soapy layer called saponification → smothers the fire.
2. Smother with a metal lid
   • If small and manageable.
3. Turn off the heat source.

🚫 Never use

• Water (violently splashes oil → fireball)
• Dry powder (less effective on deep oil fires)

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Quick Summary Table

Fire Class	Fuel Type	Best Extinguishing Method	Avoid
A	Solid combustibles	Water, Foam, ABC Powder	CO₂ alone
B	Flammable liquids	Foam, CO₂, DCP	Water
C	Flammable gases	Shut gas, CO₂, DCP	Water jet
D	Metals	Class-D Powder, Sand	Water, Foam
E	Electrical sources	CO₂, ABC Powder	Water
K/F	Cooking oil/fats	Wet Chemical	Water, DCP

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How to Use a Fire Extinguisher (PASS Method)

Even if you know the fire class, using the extinguisher correctly matters.

P – Pull the pin
A – Aim at the base of the fire
S – Squeeze the handle
S – Sweep side to side

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Final Advice

Fire safety is chemistry in action. Knowing the fire type means choosing the right strategy. For homes, schools, and coaching centers, keep:

• 1 ABC Dry Powder extinguisher
• 1 CO₂ extinguisher for electrical areas
• 1 Small fire blanket for kitchen use

If the fire is growing or filling the area with smoke — evacuate immediately and call emergency services.

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Exam Revision planner (JEE/NEET)

Exam Revision Strategizer

AI-driven strategy based on Time Left, Proficiency, and Subject Interest.

JEE (Main/Adv)

NEET (Medical)

📅 When is your exam?

PHYSICS

Current Proficiency (Mock Score) Weak (< 30%) Average (30-70%) Strong (> 70%) Interest Level I hate it / Fear it It's okay / Neutral I love solving it Syllabus Completed (%)

50%

CHEMISTRY

Current Proficiency (Mock Score) Weak (< 30%) Average (30-70%) Strong (> 70%) Interest Level Boring / Memorization is hard It's okay Favorite subject Syllabus Completed (%)

50%

MATHEMATICS

Current Proficiency (Mock Score) Weak (< 30%) Average (30-70%) Strong (> 70%) Interest Level Struggle to solve Manageable My strongest suit Syllabus Completed (%)

50%

🚀 Your Personalized Attack Plan

PHYSICS PROTOCOL

CHEMISTRY PROTOCOL

MATHS PROTOCOL

Emotional Ecosystem Analyzer

Your grades are visible, but your emotional triggers are hidden. Let's identify who or what is draining your mental battery.

Part 1: Internal State

1. When you wake up in the morning, what is your very first thought?

Dread/Fear: "I don't want to face today." Numbness: "Another day, same routine." (Autopilot) Anxiety: "I have so much to do, I'm already behind." Purpose: "Okay, let's get to work on the plan."

2. How do you handle failure or a bad test score?

Self-Hatred: "I am stupid/worthless." Hopelessness: "It doesn't matter how hard I try, nothing changes." Defensiveness: "The paper was unfair / Teacher is bad." Analysis: "I made specific mistakes. I need to fix X and Y."

Part 2: Family Dynamics

3. How do your parents react to your academic performance?

Comparison: "Why can't you be like [Cousin/Neighbor]?" Disappointment: They go silent or look visibly upset. Micromanagement: They take away my phone/hobbies immediately. Support: "Let's see where you went wrong and how we can help."

4. Can you talk to your family about stress?

No, they dismiss it as "drama" or "excuses". No, I hide it because I don't want to worry them. Sometimes, but they usually just tell me to "study harder". Yes, they listen and try to comfort me.

Part 3: Friends & Peers

5. How do you feel around your friends/study group?

Inferior: They constantly brag about their marks/progress. Distracted: They pressure me to skip studying or play games. Isolated: I don't really have friends right now. Motivated: We push each other to study better.

6. Do you check social media to compare yourself to others?

Obsessively. Seeing others having fun makes me depressed. Often. I feel like I'm missing out on life. Sometimes, but I know it's fake. Rarely. I'm focused on my own path.

Part 4: School/Coaching

7. How is the environment at your coaching/school?

Toxic: Teachers humiliate low scorers openly. Negligent: Teachers only care about the "Toppers". Chaotic: The syllabus is rushing too fast to understand. Supportive: Doubts are encouraged and pacing is managed.

8. Do you feel safe asking a "stupid question" in class?

Never. I'm terrified of being laughed at. Only if I ask the teacher privately afterwards. I hesitate, so I usually look it up online later. Yes, I ask immediately.

📊 Emotional Stress Audit

Internal Emotional Baseline

🚨 Primary External Stressor Identified

Based on your answers, the biggest factor negatively affecting your mental state is:

Secondary Factors Breakdown

Family Pressure

Social/Peer Pressure

School/Coaching Environment