Question breakdown in Litmus from Lichens (Q21–Q25)
| Question | Response Type | Topic | NYSP12SLS Standard | Action |
|---|---|---|---|---|
| Question 21 | 1-credit Multiple Choice (4 options) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 22 | 1-credit Constructed Response (rubric-scored) | Bonding and formulas | HS-PS1-2 | Solve in workspace → |
| Question 23 | 1-credit Constructed Response (rubric-scored) | Periodic patterns | HS-PS1-1 | Solve in workspace → |
| Question 24 | 1-credit Multiple Choice (4 options) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 25 | 1-credit Multiple Choice (4 options) | Solutions | HS-PS1-10 | Solve in workspace → |
Other clusters in Chemistry Practice Examination · 120
| Questions | Cluster & Topics | Format | Practice |
|---|---|---|---|
| 1–5 | A Nuclear Battery for a Remote SensorNickel-63 powering a sensor for decades: nuclear equations, half-life, and choosing a power source from dataNuclear chemistry · Engineering design · Materials and structure (HS-PS1-8, HS-ETS1-3, HS-PS2-6) | 3 MC, 2 CR | Practice cluster |
| 6–10 | Stitches That DissolveAbsorbable surgical sutures breaking down in the body: electronegativity, percent by mass, and balancing equationsPeriodic patterns · Stoichiometry and conservation · Reaction rates · Engineering design (HS-PS1-1, HS-PS1-7, HS-PS1-5, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
| 11–15 | A Whitewater Raft in Midday SunAir sealed in an inflated tube as the day warms: Kelvin temperature, gas pressure, and molecular kinetic energyGases (HS-PS1-9) | 3 MC, 2 CR | Practice cluster |
| 16–20 | The Salty Ocean Under Europa's IceMagnetic clues to liquid water on a Jupiter moon: electrical conductivity, solubility curves, and mole ratiosBonding and formulas · Solutions · Stoichiometry and conservation (HS-PS1-2, HS-PS1-10, HS-PS1-7) | 3 MC, 2 CR | Practice cluster |
| 26–30 | Biodiesel from Used Cooking OilConverting waste oil with methanol and a catalyst: reaction rate, attractions between molecules, and mole ratiosStoichiometry and conservation · Reaction rates · Materials and structure (HS-PS1-7, HS-PS1-5, HS-PS2-6) | 3 MC, 2 CR | Practice cluster |
| 31–35 | Carbonated Springs at SaratogaFizzy spring water and the rock it deposits: types of chemical bonds, Le Châtelier's principle, and bright-line spectraBonding and formulas · Equilibrium · Stoichiometry and conservation · Electromagnetic radiation (HS-PS1-2, HS-PS1-6, HS-PS1-7, HS-PS4-4) | 3 MC, 2 CR | Practice cluster |
| 36–40 | Holes in the Foil over a LasagnaAluminum foil on tomato sauce in a steel pan: oxidation and electron flow, ion charges, and percent of a safe intakeOxidation and reduction · Periodic patterns · Stoichiometry and conservation · Engineering design (HS-PS1-12, HS-PS1-1, HS-PS1-7, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
| 41–45 | Painting with Hot BeeswaxMolten encaustic paint on a heated palette: heating curves, polarity and attractions between molecules, heat of fusionIntermolecular forces · Polarity and molecular structure · Materials and structure · Thermochemistry · Engineering design (HS-PS1-3, HS-PS2-6, HS-PS3-1, HS-ETS1-2) | 3 MC, 2 CR | Practice cluster |
| 46–50 | Growing Ginseng in the Shade of a ForestRaising a shade-loving root crop under trees and cloth: light wavelengths, percent of light blocked, and photosynthesisElectromagnetic radiation · Photosynthesis · Engineering design (HS-PS4-4, HS-LS1-5, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
Frequently asked questions
- How is Litmus from Lichens · Chemistry Practice Examination · 120 Chemistry Regents Cluster (Q21–Q25) structured on New Regents?
- Dyes that tell acids from bases: electron-dot diagrams, electronegativity trends, and acid-base equilibrium. Practice the Litmus from Lichens phenomenon cluster (Q21–Q25: 3 MC, 2 CR) from Chemistry Practice Examination · 120 (Physical Science: Chemistry). Covers Acids and bases, Bonding and formulas, Periodic patterns, Solutions (HS-PS1-11, HS-PS1-2, HS-PS1-1, HS-PS1-10) with the 2025 Reference Tables and scoring guide. Every question is worth 1 raw credit and pairs with the 2025 Edition Reference Tables, automatic multiple-choice key checking, and step-by-step constructed-response scoring guidance.
- Can I practice one phenomenon cluster at a time or sit the full exam?
- Yes. In the New Regents workspace you can launch any individual 4–6 question cluster in Learn mode (with strategy prompts) or sit the complete examination in Exam mode, then review every answer against the official-style scoring guide.