Chemistry trivia

8 chemistry trivia questions, from easy to hard. Tap a question to see the answer. They're real questions from Rubicon, where you type the answer yourself and an AI judge reads what you meant.

This set covers Acids, Bases & Salts, Atoms & Bonding, Elements & the Periodic Table, Mixtures & Solutions, Organic & Carbon Chemistry, Polymers & Plastics and States & Changes of Matter.

Questions and answers

  1. Easy An acid and a base produce salt and which common liquid?

    Mixing an acid and a base produces a salt alongside plain liquid water.

  2. Easy Which everyday personal grooming tool was commonly molded from celluloid as an ivory substitute?

    Hair combs were widely manufactured from celluloid as a cheap substitute for expensive tortoiseshell and ivory.

  3. Easy From which older Latin name does the chemical symbol Na originate?

    The chemical symbol Na comes from natrium, its historical Latin name.

  4. Medium Why can butane exist as both a straight chain and a branched molecule with identical formulas?

    Carbon atoms can link together in different geometric arrangements while still binding the exact same number of total atoms.

  5. Medium Why does heating a regular gas sufficiently turn it into plasma rather than just a hotter gas?

    Intense heat ionizes the gas, ripping electrons from atoms to create a mix of free electrons and ions.

  6. Medium Why does dropping solid dry ice into warm water produce dense white clouds instead of invisible carbon dioxide gas?

    The extreme cold rapidly chills surrounding water vapor in the air, causing it to condense into visible tiny liquid water droplets.

  7. Hard Why is the bond angle in an ammonia molecule slightly smaller than the standard angle found in methane?

    Ammonia's unshared electron pair occupies more space than bonding pairs, exerting stronger repulsion that squeezes the bonds together.

  8. Hard From an energy and randomness perspective, why does adding a solute make liquid molecules less eager to escape into vapor?

    Dissolving creates disorder in the liquid, reducing the entropy gain normally driving molecules to escape into the vapor state.

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