How long does it take to play "Class 9 Chemistry: Atoms and Molecules"?

Most players finish "Class 9 Chemistry: Atoms and Molecules" in about 5 minutes. Each question runs on a 20-second timer with a short reveal between rounds, so 10 questions move at a brisk but comfortable pace.

Is a signup required to play "Class 9 Chemistry: Atoms and Molecules"?

No account is required. "Class 9 Chemistry: Atoms and Molecules" opens in any modern browser and starts on the first tap. Players stay anonymous unless they enter a nickname at the end for the leaderboard.

Which voice narrates "Class 9 Chemistry: Atoms and Molecules"?

Priya is the AI host for "Class 9 Chemistry: Atoms and Molecules". Priya handles the intro, narrates each question, and reacts to right and wrong answers in real time. There are six other hosts you can browse at /hosts/priya.

Is "Class 9 Chemistry: Atoms and Molecules" too hard for beginners?

"Class 9 Chemistry: Atoms and Molecules" is set to medium difficulty, which means it's a mid-level challenge — expect questions that reward genuine familiarity with the topic but don't require deep expertise. The overall tone is fun, so the host leans into the fun.

What's inside "Class 9 Chemistry: Atoms and Molecules"?

The pack centers on NCERT Class 9 chemistry — laws of chemical combination, atomic mass, molecular mass, mole concept, atoms and molecules, writing chemical formulas, valency. With worked numerical examples.. The question set draws from Laws of chemical combination, Atomic and molecular mass, The mole concept, Writing chemical formulas, Understanding valency, and Chemical substance composition. Individual questions aren't listed here to keep the first playthrough spoiler-free.

Can I play "Class 9 Chemistry: Atoms and Molecules" in a different language?

The primary language of this pack is English. Creator Pro subscribers can retranslate any pack into any of Trivana's ten supported languages, and the AI host re-voices the questions in that language rather than reading a subtitle.

Class 9 Chemistry · 10Q AI Trivia

About “Class 9 Chemistry: Atoms and Molecules”

~5 min

10 questions

medium

fun

English

Hosted byWarmPriyaDesi warmthWarm, patient Indian-English with Hindi fluency

"Class 9 Chemistry: Atoms and Molecules" is a medium-difficulty gameshow about NCERT Class 9 chemistry — laws of chemical combination, atomic mass, molecular mass, mole concept, atoms and molecules, writing chemical formulas, valency. With worked numerical examples.. It's built to reward genuine curiosity — not to flood you with filler questions — and everything is voice-hosted by Priya.

You'll see questions pulled from Laws of chemical combination, Atomic and molecular mass, The mole concept, Writing chemical formulas, Understanding valency, and Chemical substance composition. That's the shape of the pack; the actual wording waits until you hit Start.

Priya hosts with warm, encouraging energy — every player gets the star treatment. Priya narrates every question and reacts to each answer in real time, not with canned "correct / incorrect" beeps.

When you're done, send the link to someone who thinks they'd beat your score. They don't need an account, an app, or your device — the whole thing runs in any modern browser. Published in English.

What you’ll be tested on

Laws of chemical combination

Atomic and molecular mass

The mole concept

Writing chemical formulas

Understanding valency

Chemical substance composition

About this game

Class 9 Chemistry: Atoms and Molecules is a 10-question AI-hosted trivia round about NCERT Class 9 chemistry — laws of chemical combination, atomic mass, molecular mass, mole concept, atoms and molecules, writing chemical formulas, valency. With worked numerical examples.. The round is balanced for mixed audiences — challenging enough to keep regulars engaged without losing newcomers, and the host carries it with a tone that is fun and upbeat — the round keeps the energy light while still rewarding real topic knowledge. Most players finish in about 4 minutes on phone or laptop — no signup, no app install, just a shareable link that opens straight into the game.

Every question is generated by AI and validated through cross-model fact-checking before publication. The host voice (delivered by Priya) reads each question aloud with timing, reacts to your answer in real time, and produces a shareable scorecard when the round ends. Trivana is built for the moment when a static quiz form falls short of the gameshow energy the topic deserves.

What we verified before publishing

Fact-check status: skipped

The following claims were verified through Perplexity Sonar before the questions were finalised. The host can reference any of them during play:

NCERT Class 9 Science Chapter 3 is titled "Atoms and Molecules. "
The law of conservation of mass states that mass can neither be created nor destroyed in a chemical reaction.
The law of constant proportions states that a given compound always contains the same elements in the same fixed proportion by mass.
The law of multiple proportions states that when two elements form more than one compound, the masses of one element that combine with a fixed mass of the other are in a ratio of small whole numbers.
Gay Lussac’s law of gaseous volumes states that reacting gases combine in simple whole-number volume ratios at the same temperature and pressure.
Avogadro’s law states that equal volumes of all gases at the same temperature and pressure contain equal numbers of molecules.
The atomic mass unit is defined on the carbon-12 scale, where 1 u is one-twelfth of the mass of a carbon-12 atom.

Show all 10 questions, answers, and explanations — full spoilers, only expand after playing

Heads up: opening this section reveals every question, every option, and the correct answer for this round. If you came here to play, scroll up and hit Play first.

Question 1: Which law states that mass can neither be created nor destroyed in a chemical reaction?

Avogadro's law
Law of multiple proportions
Law of constant proportions
Law of conservation of mass ✓ correct

Explanation: The law of conservation of mass is a fundamental principle in chemistry, asserting that the total mass of reactants equals the total mass of products.

Question 2: What is the atomic mass unit (u) defined relative to?

Nitrogen-14 atom
Hydrogen-1 atom
Oxygen-16 atom
Carbon-12 atom ✓ correct

Explanation: The atomic mass unit is defined as one-twelfth of the mass of a single carbon-12 atom, which serves as the standard reference for atomic weights.

Question 3: Approximately how many particles are contained in one mole of a substance?

6.022 × 10^24
6.022 × 10^20
6.022 × 10^22
6.022 × 10^23 ✓ correct

Explanation: One mole of any substance contains Avogadro's number of entities, which is approximately 6.022 × 10^23 particles, representing a standard unit in chemistry.

Question 4: In the chemical formula H2O, what does the subscript '2' indicate?

Two oxygen atoms
Two hydrogen atoms ✓ correct
Two chemical bonds
Two water molecules

Explanation: In chemical formulas, subscripts indicate the number of atoms of that specific element present in one molecule of the substance, so H2 has two hydrogens.

Question 5: Which law states that a compound always contains the same elements in a fixed proportion by mass?

Law of multiple proportions
Gay Lussac's law
Avogadro's law
Law of constant proportions ✓ correct

Explanation: The law of constant proportions, also known as the law of definite proportions, ensures that chemical compounds have a consistent elemental composition by mass.

Question 6: What is the term for the combining capacity of an atom?

Valency ✓ correct
Atomic mass
Mole
Molecular mass

Explanation: Valency represents the combining capacity of an atom, determined by the number of electrons an atom needs to lose, gain, or share to achieve stability.

Question 7: What does the molecular mass of a substance represent?

Mass of one mole
Sum of atomic masses ✓ correct
Volume of gas
Number of atoms

Explanation: The molecular mass is calculated by summing the atomic masses of all the individual atoms present in one molecule of a given chemical substance.

Question 8: Which law states that equal volumes of gases at the same temperature and pressure contain equal numbers of molecules?

Law of conservation of mass
Law of multiple proportions
Avogadro's law ✓ correct
Gay Lussac's law

Explanation: Avogadro's law provides the relationship between the volume of a gas and the number of molecules it contains under constant temperature and pressure conditions.

Question 9: What does a chemical formula primarily show?

The reaction rate
Symbols and number of atoms ✓ correct
The temperature of reaction
The color of the substance

Explanation: A chemical formula is a concise way to represent the symbols of constituent elements and the specific number of atoms of each in a molecule.

Question 10: Which law relates to reacting gases combining in simple whole-number volume ratios?

Law of constant proportions
Avogadro's law
Law of conservation of mass
Gay Lussac's law ✓ correct

Explanation: Gay Lussac’s law of gaseous volumes states that when gases react, they do so in volumes which bear a simple ratio to one another and to the products.

Priya