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Colligative properties are a classic high-yield topic on the DAT General Chemistry section. Understanding how particle number affects boiling point elevation, freezing point depression, and osmotic pressure is essential for solving many exam questions efficiently. In this video, Dr. Jim Romano...

Here is a representative Quantitative Reasoning problem involving prime factorization — a concept that appears frequently on the DAT in disguised form. Problem 224 = (2^a)(7^b) What is a / b ? A) 7 B) 5 C) 7/5 D) 5/5 E) 1/7 Try solving it before looking at the explanation. Solution...

What effect will adding additional O₂ (g) have on the following equilibrium system once equilibrium is reestablished? 2 CO₂ (g) ⇌ 2 CO (g) + O₂ (g)  ΔH° = −514 kJ a) The concentration of CO (g) will increase b) The concentration of CO₂ (g) will decrease c) The equilibrium constant for the...

Here is a classic combined work rate problem similar to what you may encounter on the Quantitative Reasoning section of the DAT. Three printers are typing a full report. • Printer A types 1/2 of the report in 2 hours • Printer B types 1 full report in 2 hours • Printer C types 1/4 of the...

Discount word problems are a common source of lost points on the DAT Quantitative Reasoning section. In this video, Prof. Denis Blois walks through a representative discount problem step-by-step, showing how to correctly interpret percentages, compare original and sale prices, and avoid the...

Omar Daraghmeh has several bottles of liquids. Which pair is MOST likely to behave as an IDEAL solution (Raoult’s Law)? Correct Answer: C) Hexane + Heptane

Hi Dr. Romano I just wanted to reach out and let you know that I’ve committed to Boston University Henry M. Goldman School of Dental Medicine, DMD Class of 2030. Thank you again for all your work and for pushing me to accomplish so much. We’re proud to celebrate our former student and wish...

With Valentine’s Day here, we wanted to do something supportive for students preparing for the DAT. We’re hosting a Valentine’s Giveaway and giving away one free DAT or OAT Destroyer book to a student using serious DAT study materials. If the winner already owns the DAT Destroyer, no worries...

Which atom has the smallest first ionization energy? (A) Mg (B) Al (C) Si (D) P (E) He Answer: B — Aluminum This is a classic DAT conceptual exception. Although first ionization energy generally increases from left to right across a period, there is a well-known anomaly between Group 2...

DAT questions often test application, not memorization. Today’s General Chemistry Question of the Day focuses on a molecular geometry application involving a coordination compound. Rather than asking for definitions, this question requires reasoning by analogy to determine how molecular...

Sharing a short General Chemistry video for DAT and OAT students. In this lesson, Dr. Jim Romano explains how density problems are tested on the DAT and walks through the setup step by step. These questions are very common, especially for students early in their preparation, and mistakes...

One of our students just received an acceptance to Touro College of Dental Medicine — Class of 2030. “I just wanted to let you know I got into Touro. Thank you for all your help throughout this process — I couldn’t have done it without you and the DAT Destroyer.” Congratulations on a...

Dr. Jim Romano explains enzymes and inhibitors — a high-yield DAT Biology topic that students frequently miss. Watch here: DAT Destroyer Resources: 2026 DAT Destroyer – High-Yield DAT Science Study Guide For free daily help, join the DAT Destroyer Facebook Study Group (Official DAT...

Answer is C Quick DAT Question of the Day (General Chemistry): Root mean square speed is given by: vrms=3RTMv_{rms} = \sqrt{\frac{3RT}{M}}vrms=M3RT Consider nitrogen and hydrogen at 35°C. At what temperature would they display equal RMS speed? (See the slides below for the full setup...

Thank you to the students who have trusted DAT Destroyer over the years. We will continue posting FREE high-yield DAT Biology, General Chemistry, and Organic Chemistry videos to help students prepare the right way. Official Channel: DAT Destroyer by Dr. Jim Romano For free daily help, join...

High-yield DAT General Chemistry topic. In this video, Dr. Jim Romano explains heat of formation calculations step by step and shows how to correctly calculate reaction enthalpy using thermochemical data without falling into common DAT traps. This is a concept students often try to memorize...

As a thank-you to the SDN community, SDN members can use the discount code SDNTake10 for 10% off any single Destroyer book (DAT or OAT). Please note: • The discount applies to individual books only • Bundles are already discounted automatically at checkout, so no additional code is needed for...

Many students struggle with DAT Organic Chemistry because they try to memorize reactions instead of understanding reaction mechanisms. In this short video, Dr. Jim Romano explains how to approach DAT Organic Chemistry mechanisms using clear, step-by-step reasoning and DAT-style strategy. The...

Hi everyone — wanted to share a quick video walkthrough on an important QR topic that many students struggle with: Comparison Word Problems This video breaks down how to approach DAT-style comparison problems step-by-step so you can avoid timing traps and avoid common mistakes. YouTube 📹...

#DAT Question of the Day.... Identify the structures indicated by the arrows. a) Secretory granules b) Ribosomes c) Lipid droplets d) Lysosomes e) Glycogen granules Correct answer: B — Ribosomes Ribosomes are essential cellular machines responsible for protein synthesis. They translate...

General chemistry pH calculations are a high-yield topic on the DAT and OAT, and many students lose points by overthinking the setup. In this short video, Dr. Jim Romano walks through a clear, exam-focused approach to pH calculations so you can recognize the correct method quickly and avoid...

DAT Question of the Day Consider the process shown (pyruvate → acetyl-CoA). Question: What vitamin is most involved? a) Vitamin C b) Vitamin D c) Vitamin B d) Vitamin K e) Vitamin A Correct answer: c) Vitamin B (specifically Vitamin B1, thiamine) Why? This reaction involves a...

The number of carbon atoms in the parent chain when naming this compound by IUPAC is ____________. a) 4 b) 5 c) 6 d) 7 e) None of these Correct Answer: B (5) This one is tricky AF. The longest carbon chain MUST contain the parent functional group. In this problem, the parent...

Mr. Rostov invested a sum of money into an index fund that pays 9% interest per year. After 30 years, his gain was $1,326,767.85. Prior to the investment, Mr. Rostov was saving $50 per day from his salary. How long did he have to save to invest the needed amount to obtain those gains? A) 2.5...

Question: How many distinct C-13 NMR signals does C₆₀ (buckminsterfullerene) produce? Answer: Even though C₆₀ contains 60 carbon atoms, it produces only 1 C-13 NMR signal. This is because the molecule is extraordinarily symmetrical — every carbon atom occupies an identical environment. In NMR...

At what vertebrae level does the spinal cord end? a) T1–T2 b) Sacrum c) L1–L2 d) T12–L1 e) Coccyx Correct Answer: C (L1–L2) In adults, the spinal cord ends in the lumbar region at the level of the first and second lumbar vertebrae (L1–L2). This cone-shaped ending is called the conus...

SN1 vs SN2 is one of the most tested reaction mechanisms on both the DAT and OAT, and many students still struggle to decide which pathway a substitution reaction will follow. Dr. Romano breaks down the key concepts step-by-step in this short teaching video. What this video covers: • The...

Black Friday Giveaway Winner Announcement | DAT Destroyer | OAT Destroyer Congratulations to our Black Friday Giveaway Winner, @seohyunmiin. You have won a brand-new DAT Destroyer book from Dr. Jim Romano and Orgoman. Please contact us within 7 days so we can confirm your shipping...

Sheldon has 60 fewer apps on his phone than Patricia.Patricia has 5× as many apps as Sheldon.If their total number of apps were divided evenly among three friends, how many apps would each friend receive? A) 12 B) 15 C) 30 D) 20 E) 10 Answer: C Let S = Sheldon and P = Patricia S = P – 60...

Here’s a classic question from Dr. Jim Romano’s collection — a great test of your understanding of cell potentials under standard conditions: 2Ga(s) + 6H⁺(aq) → 2Ga³⁺(aq) + 3H₂(g) If the cell voltage for this reaction is 0.54 V under standard conditions, what is the cell potential for the...

Dr. Romano goes over the rules for naming compounds, an essential General Chemistry topic on the DAT. This video is a great refresher if you want to strengthen your fundamentals before exam day. Watch here: If you have questions after watching, feel free to post them here — happy to help...

Choosing the right DAT prep resource can feel overwhelming with so many options out there — and lots of marketing hype. We recently put together a side-by-side guide comparing DAT Booster and DAT Destroyer to help students make the best decision for their study journey. In this post, we...

Here's another DAT Question of the Day straight from Dr. Romano! Test yourself and then check the solution on slide two. 💥 Slide 1: Problem Slide 2: Solution

Welcome to the DAT & OAT FAQ and Student Score Hub by DAT Destroyer This thread is a free resource created to help pre-dental and pre-optometry students succeed. Whether you have questions about the DAT, the OAT, or simply want to connect with others on the same journey, you’re in the right...

Here’s a high-yield DAT biology question for anyone prepping this cycle: The bacteria involved in the production of dental caries is…? A. Streptococcus mutans B. Enterococcus C. Yersinia pestis D. Streptococcus pyogenes E. Bordetella pertussis Answer: A is correct! Explanation: The...

Hello, I plan to study for the DAT this fall through my fall semester in undergrad. I was wondering if anyone has tips or experience on what study schedule works best for this type of situation, I plan on starting in September and taking the DAT beginning of January. My winter break is...

Hang in there! The only thing tougher than waiting for a dental school interview is… well, actually, nope — that’s pretty much as tough as it gets. 😅 But seriously, you’re right on schedule. Most schools don’t send all their invites at once, and it’s totally normal not to hear anything in...

Hi everyone! I recently got my DAT score back, and I got a 450 AA and a 400 PAT score. Is this good enough for dental school?? From the ADEA conversion chart pdf, I believe my AA score is a 22 and my PAT score is a 19 on the old scale. I am entering my third year of undergrad but, right now, I...

📘 DAT Daily Practice — pH Question Here's a great no-calculator-style problem students should be ready for: A) 7.0 × 10⁻⁵ M B) 2.0 × 10⁻⁶ M ✅ C) 1.0 × 10⁻⁵ M D) 1.0 × 10⁻⁶ M E) 3.0 × 10⁻⁵ M Correct answer: B Don’t forget on the real DAT, these no-calculator mental math questions come fast...