Ask a question or paste your study material. Shishya AI works out the subject on its own, then writes the explanation at your level — grade 5 through 12, or NEET and JEE — in English, Hindi or Gujarati.
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Why does ice float on water?
Ice floats because it is lighter than water. Not lighter in total — lighter for the same amount of space.
When water freezes, its tiny parts spread apart. They lock into a pattern with gaps inside. Those gaps make ice take up more room.
More room, same stuff. So ice is less dense. Anything less dense than water floats on it.
Think of a packed schoolbag and a loose one. Same books, more space.
Water is one of very few substances whose solid form is less dense than its liquid form, and that anomaly is the entire answer.
In liquid water, molecules are held by hydrogen bonds that constantly break and re-form, letting molecules pack closely. On freezing, each molecule bonds to four others in a fixed tetrahedral lattice — an open structure with hollow space built into it.
By Archimedes' principle the ice sinks only until it displaces its own weight — which is why roughly 92% of an iceberg sits below the surface.
Each H₂O molecule in ice forms four hydrogen bonds in a tetrahedral arrangement, producing hexagonal voids. Density falls to 917 kg m⁻³ against 1000 kg m⁻³ for liquid water.
Trap: the question rewards density, not weight. NCERT Class 11, Chemistry, Unit 9.
Same question. Same student. The vocabulary, sentence length, depth and answer shape all change with the level.
The explanation is written in the language you chose. Formulas, units and scientific terms stay in English, exactly as the bilingual question papers print them.
Ice floats on water because its density is lower.
Term introduced, then used.
बर्फ़ पानी पर तैरती है क्योंकि उसका घनत्व (density) कम होता है।
English term kept in brackets on first use.
બરફ પાણી પર તરે છે કારણ કે તેની ઘનતા (density) ઓછી હોય છે.
Same rule, same level, same answer.
Most study tools give every student the same answer and hope it lands. These two are the reason Shishya AI doesn't.
INNOVATION 01
Ten cognitive profiles — grades 5 to 12, plus NEET and JEE. Each sets its own vocabulary limit, sentence length, number of reasoning steps, kind of example and depth of abstraction before a single word is written.
A grade 5 answer isn't a grade 10 answer with shorter words. It is built to a different specification from the start.
Set once, applies to everything
INNOVATION 02
Highlight any line that didn't land — a term, a step, a formula — and ask for that piece on its own. The new explanation arrives underneath, at your level, in your language.
No retyping what you didn't understand, and no starting a fresh chat that has forgotten the question you were on.
Highlight, then ask
…each molecule bonds to four others in a fixed tetrahedral lattice, an open structure…
Explain thisTap your grade, or NEET or JEE. It's remembered next time, so you set it once and forget it.
Level
A question, or a paragraph straight out of your textbook. Shishya AI identifies the subject and the question type on its own — you never pick from a menu.
Composer
One column, real typography, headings and worked steps — with a key-points summary at the end. Highlight anything that didn't land to have that part explained on its own.
Answer
Water is one of very few substances whose solid form is less dense than its liquid…
Generate a quiz from what you just read, at the same level. Save the session as a file that opens offline in any browser — yours to keep, no login needed to read it back.
Quiz
Ice floats because it has a lower…
ice-notes.html
Grades 5 to 12, plus NEET and JEE exam mode — the option named first, then the shortest sound route, then the trap the question was built around.
Select any part of an answer — a line, a term, or just one step of a maths equation — and its explanation opens in a window right there, at your level and in your language, without losing the answer you were reading.
tetrahedral lattice
Explain thisQuestions written from what you just read, at your level, with distractors built from real mistakes.
One centred column on ruled lines, with the text sitting on the rules rather than floating between them. No sidebars, no infinite scroll — a page built for reading.
The water cycle is the continuous movement of water between the oceans, the atmosphere and the land…
Export a session as one self-contained file. It opens offline, forever, with no account.
Formulas typeset, not typed out — units, symbols and constants carried through every step.
One price, everything included at that tier. No credits to top up and no per-question meter running while you think.
Basic
Best for grade 5 to 8, working through the school syllabus.
Start with BasicPro Most chosen
Best for grade 9 to 12 and for NEET or JEE preparation alongside school.
Start with ProInstitutions
For schools, tuition classes and institutions, priced per batch.
Talk to usOne account adapts to whoever is using it, so brothers and sisters in different classes can share the same subscription — a child in grade 5 and another in grade 9 simply set their own level before asking, and each gets an answer written for them.
Prices in Indian rupees. Cancel any time — your saved sessions stay readable whether you're subscribed or not.
The vocabulary ceiling, sentence length, number of reasoning steps, the kind of example used, the notation allowed, and the length of the answer. A grade 5 answer holds to 8–12 word sentences and one new technical term; a grade 12 answer runs 30–40 word sentences and full advanced notation. The level is set before the answer is written, not applied afterwards.
Yes. The content sits at class 11–12 depth, but the answer takes an exam shape: the correct option named on the first line, then the shortest sound route to it, why each wrong option is wrong, and the trap the question was built around. NEET answers are anchored to NCERT.
Yes. The explanation is written in your language, but formulas, units, chemical and biological nomenclature and the A/B/C/D option labels stay in English — the same way the bilingual question papers print them, so what you revise is what you will see in the hall.
Yes. Saved sessions export as a single self-contained HTML file that opens in any browser, offline, with no account and no connection. Anything you have already saved stays readable whether you are subscribed or not.
Institutions are priced per batch rather than per seat, with bulk onboarding, invoicing, a teacher view of class activity, and a session to get staff started. Write to us with your batch sizes and we will send a quote.
Yes. The level is chosen at the moment a question is asked, not fixed to the household, so a brother in grade 5 and a sister in grade 9 can use the same subscription. Each sets their own level before asking and receives an answer written for that level.
Chemical structures and reactions are generated by AI and drawn automatically from that output. The system checks each structure before showing it — the molecular formula is recalculated from the drawing and compared with the one given, and any structure that fails is withheld rather than shown. Even so, AI can occasionally be mistaken, so please check anything you rely on for an examination against your textbook or teacher. The prose explanation is always written to stand on its own, so nothing is lost if a diagram is withheld.
Yes. Grade adaptation and single-click explanation are both patent pending and protected by copyright. The way chemical structures and reactions are rendered, the way answers are laid out and displayed, and the design of the reading interface itself also form part of the innovation of Noxie Innovation Pvt Ltd. We mention this simply so the position is clear, and we are glad to answer any question about it.
Set your grade, type what you're stuck on, and read the answer written for you. Schools and tuition classes, write to us for batch pricing.
Start learning freeQuestions, batch pricing or anything else — write to hello@shishyaai.com and we will come back to you.