4AB › The 4AB ecosystem
The 4AB ecosystem
Everything under 4AB Great Services, grouped the way the site is: chemistry, education, directory, spiritual, life, ventures.
39 things to openABC Chemistry →
ABC Chemistry Calculator
Free online calculator suite for chemistry, physics, maths and accounting — molar mass, equation balancer, periodic table, pH, kinematics, derivatives and more.
Interactive Periodic Table
A premium, interactive periodic table of all 118 elements. Tap any element for atomic mass, electron configuration, physical and chemical data — then open…
Chemistry Question Bank
4,141 chemistry PYQs + AI checker
Questions by topic
Every question with its answer, chapter by chapter
Symmetry Lab
Point groups in 3D
Chemistry Typing
Formulas & equations for Word
ABC Coaching
Class 11 to CSIR-NET · fees · free demo
Class 11 · 12
Home, group and online classes
JEE · NEET · CUET
Entrance coaching
JAM · NET · GATE
Postgraduate entrance batches
ABC Blog
Chemistry articles
Dreamers Quiz
Free chemistry quizzes
ABC Jobs
Careers at ABC Chemistry
Great Education →
Question Bank & PYQs
Previous-year questions exactly as printed — CSIR-NET, GATE and IIT-JAM chemistry, plus general aptitude. Free, by chapter or by exam.
Notes Maker
Topic notes built from the bank: worked examples are real questions with their printed answers, and anything AI drafts is labelled.
AI Answer Checker
Get homework and exam answers checked with AI, or score an objective paper with the marks checker.
My Progress & Analysis
Your progress from the answers you have submitted, and a paper analyser for coverage, difficulty and exam mix.
Whiteboard
Teach one previous-year question at a time in classroom-size type, with a digital whiteboard beside it.
Great Home Tutors
One-to-one home tuition: tell us the class, subject and area and we match a checked tutor. Tutors can apply to join.
Great Directory →
Government Jobs
Official site, recruitment page and open vacancies for 1,406 Indian government recruiting bodies — Central, State, PSU, Defence, Banking, Railways and more.
Examination News
Notification, admit card, answer key, result and cutoff dates for CSIR-NET, GATE, IIT-JAM, CUET-PG, UGC-NET, JEE, NEET, CBSE and government job exams…
Chemistry Tutors
Phone number, address and map link for 10,789 chemistry coaching centres, home tutors, schools and colleges across Delhi, Gurugram, Noida and Ghaziabad.
Discount Coupons
Great Referral Discount Coupon Code — premium coupons, deals, brands and buying guides.
Great Spiritual →
GREAT ASTROLOGY
Create your free Janam Kundli, explore planetary analysis, Vimshottari dasha, transits, kundli matching, panchang and personalised Vedic astrology — powered…
हिंदू देवी-देवता ज्ञानकोश
देवताओं, देवियों, अवतारों, कथाओं, मंत्रों, मंदिरों, त्योहारों और पारंपरिक ज्ञान का इंटरकनेक्टेड डिजिटल ज्ञानकोश। हर प्रविष्टि शोधित, स्रोत-सहित और आपस में…
पूजा सामग्री सूची
पूजा, हवन, विवाह-संस्कार और गृह-प्रवेश की सम्पूर्ण सामग्री सूची — 284 वस्तुएँ 19 श्रेणियों में, हिंदी एवं English नाम, मात्रा एवं इकाई सहित। खोजें, चुनें और…
Puja Path
Vidhi, samagri, pandit
कहार समाज का इतिहास
कहार समाज (Kahar jati) का इतिहास, वंश व गोत्र, पारंपरिक काम, क्षेत्रीय विविधता और आधुनिक पहचान — विस्तार से, हिंदी में।
Great Life →
BP & Sugar Tracker
Record blood pressure, blood sugar, pulse, weight, medicines, meals, activity, sleep and symptoms in one place.
चंद्रवंशी क्षत्रिय समाज
चंद्रवंशी क्षत्रिय समाज (चंद्रवंशी कहार) के परिवारों और युवाओं के लिए बना विवाह मंच — समाज के भीतर योग्य रिश्ते, सम्मान और privacy के साथ।
Wedding Planning India
Plan a complete Indian wedding in one place — venue, catering, decor, pandit, photography, staff and 40+ free interactive checklists and planners.
Great Ventures →
GreatWeb
Professional websites from ₹2,999, SEO blogs from ₹499 and practical SEO plans from ₹4,999/month. Direct communication, transparent pricing, defined scope.
GreatProperty
Find a property you'll love. Buy, sell or rent flats, houses, villas, plots, offices and shops across India. Free listings, reviewed before they go live. No brokerage.
Great Aniket →
Books by Mr. Aniket Bhardwaj
Chemistry books written by Mr. Aniket Bhardwaj for CSIR-NET, GATE and IIT-JAM — read every title here, inside 4AB.
GAURAW Research & Educational Academy
GAURAW Research & Educational Academy for Tutoring — explore our brands and projects, including DelhiHomeTutor and ABC Chemistry. Call or email us today.
Square Root Shortcut Trick
Learn the easiest square root shortcut for non-perfect square numbers: ²√F = ²√P + G1/G2.
Zero Error Education
Zero Error Education has transitioned to GAURAW Research & Educational Academy for Tutoring (OPC) Pvt Ltd.
Aniket Bhardwaj
Portfolio & books
Also on 4AB
Looking for one thing? Try Tools, AI on 4AB or Projects. Prices are on the pricing page; help is at Report a problem.