Cover
Quick mode selects one question from each official topic, so no laboratory branch disappears by chance.
GENERAL CHEMISTRY · LABORATORY · MIXED PRACTICE
Verify the setup.
Respect the limit.
Retrieve across all five official topics with coverage-controlled quick and mastery sets drawn from the complete twenty-question learning bank.
5official topics
15study objectives
5guided lessons
20practice questions
5choices per question
Why this mix works
Coverage first. Evidence boundaries second.
Retrieve
Mastery mode selects one question from every study objective for a complete fifteen-outcome sweep.
Discriminate
Mixed order removes the lesson cue: identify whether scale, technique, apparatus, calibration, error, safety, graph, or evidence controls.
Repeat
A new set changes selected questions and answer positions while preserving stable answer identities.
Balanced mixed retrieval
Choose breadth or mastery.
Both modes give immediate explanations and private issue reporting. Results remain on this device and do not estimate a DAT score.
20 PRACTICE QUESTIONS · 2 STUDY MODES
Read the protocol. Bound the claim.
Each mode covers its intended topics, then shuffles question order and all five answer choices without changing the answer key.
Sources
Official scope, original practice.
The five topic labels come from the ADA DAT User’s Manual 2026 ↗. The ADA does not publish topic quotas, so DAT TRAIN does not invent them.
Free OpenStax, LibreTexts, NIST, OSHA, and ACS sources support the lessons. DAT TRAIN questions and explanations are original and are not copied from the DAT.