Question breakdown in Drain Cleaner and Bathroom Descaler (Q21–Q25)
| Question | Response Type | Topic | NYSP12SLS Standard | Action |
|---|---|---|---|---|
| Question 21 | 1-credit Multiple Choice (4 options) | Intermolecular forces | HS-PS1-3 | Solve in workspace → |
| Question 22 | 1-credit Constructed Response (rubric-scored) | Thermochemistry | HS-PS1-4 | Solve in workspace → |
| Question 23 | 1-credit Multiple Choice (4 options) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 24 | 1-credit Constructed Response (rubric-scored) | Acids and bases | HS-PS1-11 | Solve in workspace → |
| Question 25 | 1-credit Multiple Choice (4 options) | Stoichiometry and conservation | HS-PS1-7 | Solve in workspace → |
Other clusters in Chemistry Practice Examination · 122
| Questions | Cluster & Topics | Format | Practice |
|---|---|---|---|
| 1–5 | Irradiating Spices with Cobalt-60Killing microbes in dried spices before sale: ionization, isotopes and half-life, and weighing treatment optionsNuclear chemistry · Engineering design (HS-PS1-8, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
| 6–10 | Casting a Bronze BellTesting copper–tin bars for a carillon: mass percent to atom ratios, electronegativity, and oxidation numbersStoichiometry and conservation · Engineering design · Materials and structure · Periodic patterns · Oxidation and reduction (HS-PS1-7, HS-ETS1-3, HS-PS2-6, HS-PS1-1, HS-PS1-12) | 3 MC, 2 CR | Practice cluster |
| 11–15 | Through the Airlock to a SpacewalkPure-oxygen spacesuits and CO₂ scrubbers: particle models of gases, vapor pressure, and mole ratiosGases · Intermolecular forces · Stoichiometry and conservation · Periodic patterns (HS-PS1-9, HS-PS1-3, HS-PS1-7, HS-PS1-1) | 3 MC, 2 CR | Practice cluster |
| 16–20 | Nitrate in a Farm WellFertilizer seeping into groundwater near fields: solubility curves, concentration units, and soluble ionsSolutions · Stoichiometry and conservation · Bonding and formulas (HS-PS1-10, HS-PS1-7, HS-PS1-2) | 3 MC, 2 CR | Practice cluster |
| 26–30 | Welding Railroad Track with ThermiteJoining rail ends with powdered aluminum and iron oxide: activation energy, reaction rate, and mole ratiosStoichiometry and conservation · Thermochemistry · Reaction rates · Materials and structure (HS-PS1-7, HS-PS1-4, HS-PS1-5, HS-PS2-6) | 3 MC, 2 CR | Practice cluster |
| 31–35 | Fluoride and Tooth EnamelEnamel dissolving and rebuilding in the mouth: Le Châtelier's principle, balanced equations, and controlled testsEquilibrium · Stoichiometry and conservation · Engineering design (HS-PS1-6, HS-PS1-7, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
| 36–40 | A Vanadium Flow Battery at a Solar FarmPumped vanadium solutions that store energy after sunset: oxidation numbers, electron transfer, and molarityOxidation and reduction · Stoichiometry and conservation · Polarity and molecular structure · Engineering design (HS-PS1-12, HS-PS1-7, HS-PS3-5, HS-ETS1-3) | 3 MC, 2 CR | Practice cluster |
| 41–45 | Lake-Effect Snow off Lake ErieCold air crossing a warm Great Lake in early winter: energy in phase changes, hydrogen bonding, and dissolved oxygenThermochemistry · Solutions · Intermolecular forces (HS-PS1-4, HS-PS3-4, HS-PS1-10, HS-PS1-3) | 3 MC, 2 CR | Practice cluster |
| 46–50 | Trees Under Sodium StreetlightsOld streetlights, paint colors, and autumn leaf drop: bright-line spectra, electron energy levels, and reflected lightElectromagnetic radiation · Engineering design (HS-PS4-4, HS-ETS1-2) | 3 MC, 2 CR | Practice cluster |
Frequently asked questions
- How is Drain Cleaner and Bathroom Descaler · Chemistry Practice Examination · 122 Chemistry Regents Cluster (Q21–Q25) structured on New Regents?
- Mixing a grease-clearing gel with a scale remover: soap and grease, energy of dissolving, and acid–base reactions. Practice the Drain Cleaner and Bathroom Descaler phenomenon cluster (Q21–Q25: 3 MC, 2 CR) from Chemistry Practice Examination · 122 (Physical Science: Chemistry). Covers Intermolecular forces, Thermochemistry, Acids and bases, Stoichiometry and conservation (HS-PS1-3, HS-PS1-4, HS-PS1-11, HS-PS1-7) 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.