12th Grade Trivia
0Loading crowd target
0Loading crowd target
6correct to beat the crowd
50 free 12th Grade trivia questions with answers — trivia quiz, new questions added Aug 2026.
Twelfth grade is the year the syllabus turns molecular: DNA copies itself in short backward bursts, a single swapped amino acid bends a red blood cell into a sickle, and a bacterium's toxin gene ends up inside a cotton plant. In physics the atom gets orbits and then loses them, in chemistry half-lives and rate constants take over from test-tube colours, and in maths probability finally meets calculus. These 50 questions follow a class 12 syllabus rather than a pub-quiz grab bag. Genetics, molecular biology and biotechnology carry the biggest share; then physical and organic chemistry, modern physics, vectors, matrices and distributions, the novels, plays and poems of senior English, twentieth-century world history, and a little civics and economics. Every answer comes with a one-sentence explanation that adds something the textbook left out. Play it to see whether you would still pass, hand it to a student as a revision round, or print it for a classroom quiz.
30 of 50 questions with answers and explanations. Play the quiz
Q 01Which physician inoculated an eight-year-old boy with cowpox from a milkmaid's blisters to prevent smallpox?
Edward Jenner
Edward Jenner took the cowpox from milkmaid Sarah Nelmes, who caught it from a cow called Blossom, whose hide now hangs in a London medical school library.
Q 02Which novel, begun by an 18-year-old during the 'Year Without a Summer' of 1816, is subtitled The Modern Prometheus?
Frankenstein
Frankenstein came out of Lord Byron's challenge to his guests at Villa Diodati to write a ghost story; the same dare led his doctor, John Polidori, to The Vampyre, often seen as the start of the romantic vampire genre.
Q 03Whose skull does Hamlet hold in the graveyard, the court jester who once carried the young prince on his back?
Yorick
Yorick's skull has been a real one: pianist André Tchaikowsky left his to the Royal Shakespeare Company, and David Tennant held it as Hamlet in 2008.
Q 04Which 1948 US programme sent $13 billion to rebuild Western Europe, an offer the Soviet Union refused?
Marshall Plan
The Marshall Plan took its name from Secretary of State George Marshall, who floated the idea in a speech at Harvard in June 1947; officially it was the European Recovery Program.
Q 05Which particle, identified by Chadwick at Cambridge in 1932, opened the way to nuclear fission six years later?
Neutron
The neutron's discovery earned Chadwick the 1935 Nobel Prize, and he went on to head the British team on the Manhattan Project.
Q 06Which radiation, found in 1801 when Johann Ritter saw invisible rays darken silver chloride, causes sunburn?
Ultraviolet
Ultraviolet turned up because Ritter, hearing that Herschel had found heat rays beyond red, went looking past the other end of the spectrum. Ozone absorbs most of the sunburn-causing UV-B before it reaches us.
Q 07Which metal, melting at 3,422 °C, higher than any other metal, is drawn into the filaments of incandescent bulbs?
Tungsten
Tungsten's symbol W comes from its German name Wolfram, after the ore wolframite; it also has the highest tensile strength of any pure metal.
Q 08Which Orwell novel gave English 'Big Brother', 'doublethink' and Room 101, where each prisoner meets his worst fear?
Nineteen Eighty-Four
Nineteen Eighty-Four was Orwell's ninth and final completed book, finished on the remote Scottish island of Jura while he was gravely ill with tuberculosis; it also gave English 'thoughtcrime' and 'Newspeak'.
Q 09Which ocean is widening about 2.5 centimetres a year along a central ridge that Marie Tharp mapped in the 1950s?
Atlantic
The Atlantic's ridge surfaces in Iceland. When Tharp spotted a rift valley running along its crest, she recalled, her colleague Bruce Heezen at first dismissed it as 'girl talk'; her maps went on to back seafloor spreading.
Q 10In sickle-cell anaemia, which amino acid replaces glutamate at position 6 of haemoglobin's beta-globin chain?
Valine
Valine's swap makes haemoglobin S clump into fibres when oxygen runs low, yet carriers of one copy are partly protected against malaria, a link proven in 1954.
Q 11Which physicist's 1913 atomic model, with electrons in fixed orbits, explained hydrogen's spectral lines?
Niels Bohr
Niels Bohr's model built on Rutherford's discovery of the nucleus and won him the 1922 Nobel Prize, yet within a few years Heisenberg's quantum mechanics had moved past its tidy orbits.
Q 12Which Austen novel, drafted as 'First Impressions', opens by declaring a rich single man 'must be in want of a wife'?
Pride and Prejudice
Pride and Prejudice could have appeared sixteen years sooner: in 1797 Austen's father offered the draft to a London publisher, who turned it down by return of post without seeing a page.
Q 13Which plastic, the first made from synthetic components, was created in the 1900s from phenol and formaldehyde?
Q 21Which E. coli gene cluster, decoded by Jacob and Monod, switches on to digest milk sugar only when glucose runs short?
lac operon
The lac operon showed Jacob and Monod how a cell switches its genes on and off; the same pair coined the term 'messenger RNA', and a share of the 1965 Nobel Prize followed.
Q 22What term covers solution properties like freezing-point depression that depend only on the number of solute particles?
Colligative
Colligative comes from the Latin for 'bound together', and it is why road salt works: water's freezing point drops with the number of dissolved particles, whatever they are made of.
Q 23For a first-order chemical reaction, the half-life stays the same regardless of which quantity?
Initial concentration
Bakelite
Bakelite's inventor, Leo Baekeland, was already rich from Velox photographic paper and was hunting for a substitute for shellac, a resin secreted by insects.
Q 14Which rule, p² + 2pq + q², keeps allele frequencies constant in a population without selection, drift or migration?
Hardy–Weinberg equilibrium
Hardy–Weinberg equilibrium was called Hardy's law in English until 1943, when Curt Stern pointed out that the German physician Wilhelm Weinberg had got there first in 1908.
Q 15Which Mao campaign of backyard steel furnaces and forced communes caused a famine that killed tens of millions of Chinese?
Great Leap Forward
The Great Leap Forward pulled tens of millions of peasants out of the fields to smelt metal in clay furnaces, which turned out mostly brittle lumps unfit even for simple tools while the crops went untended.
Q 16Which boundary was redrawn in the 1990s to swing far east around Kiribati, putting the whole country on one side?
International Date Line
The International Date Line has no standing in international law, so any country can choose its own date; Kiribati's eastern islands dropped 31 December 1994 from the calendar to match the capital.
Q 17Which vector operation, whose result is perpendicular to both inputs, turns a lever arm and a force into torque?
Cross product
The cross product of lever arm and force is the torque, which is why a longer spanner shifts a stubborn bolt more easily; the right-hand rule tells you which way the result points.
Q 18Which nutrient, found by Henrik Dam while feeding chickens a cholesterol-depleted diet, is needed for blood to clot?
Vitamin K
Vitamin K got its letter because Dam's discovery was reported in a German journal, where it was christened Koagulationsvitamin.
Q 19Which 1958 experiment, growing E. coli on heavy nitrogen-15, showed that DNA replication is semiconservative?
Meselson–Stahl
Meselson–Stahl has been called 'the most beautiful experiment in biology', and it used the heavier but non-radioactive isotope so the DNA could be sorted by density in a centrifuge.
Q 20Whose 1928 mouse experiment with heat-killed smooth and live rough pneumococci revealed a 'transforming principle'?
Frederick Griffith
Frederick Griffith's 'transforming principle' turned out to be DNA itself, as Avery, MacLeod and McCarty and then Hershey and Chase went on to show.
Initial concentration drops out: a first-order half-life depends solely on the rate constant k, which is why carbon-14 dating works on any sample size.
Q 24Which French physicist's 1924 thesis proposed that electrons have wavelengths, confirmed by diffraction in 1927?
Louis de Broglie
Louis de Broglie first took a degree in history, meaning to become a diplomat, before his liking for science won out; the thesis that gave matter a wavelength earned him the 1929 Nobel Prize.
Q 25Which Presbyterian minister's probability theorem was read to the Royal Society in 1763, two years after his death?
Thomas Bayes
Thomas Bayes never published it: his friend Richard Price found the essay among the dead man's papers, edited it and sent it to the Royal Society himself.
Q 26Which Shakespeare tragedy turns on a strawberry-spotted handkerchief that the ensign Iago plants in Cassio's lodgings?
Othello
Othello's plot was lifted from a 1565 Italian novella by Cinthio in which only Desdemona has a name; the rest are just 'the Moor' and 'the Ensign'.
Q 27Which British lawyer got just five weeks in 1947 to draw the border between India and Pakistan?
Cyril Radcliffe
Cyril Radcliffe's line cut both Punjab and Bengal in two, yet it was announced only two days after independence, when the two new countries already existed.
Q 28Which metal, once dearer than gold, is now made by electrolysing its oxide dissolved in molten cryolite?
Aluminium
Aluminium was shown off as a precious metal at the 1855 Paris exhibition; in 1886 two 22-year-olds, Charles Hall in America and Paul Héroult in France, separately found the process that made it cheap.
Q 29Which soil bacterium's cry1Ac gene, coding for a crystal toxin, is spliced into cotton to kill bollworm larvae?
Bacillus thuringiensis
Bacillus thuringiensis toxin switches on only in the strongly alkaline gut of an insect larva and stays inert in our acidic one; sprays of the same bacterium are allowed in organic farming.
Q 30Which enzyme, found by Temin and Baltimore in 1970, lets HIV copy its RNA genome into DNA inside a host cell?
Reverse transcriptase
Reverse transcriptase vindicated Temin, whose idea that RNA could be copied back into DNA had been treated as heresy; our own cells use a relative of it, telomerase, to rebuild the tips of chromosomes.