url stringclasses 46
values | filename stringclasses 46
values | success bool 1
class | page_count int64 4 917 | page_number int64 1 917 | page_bytes stringlengths 13.1k 3.79M | output_extraction stringlengths 553 110k | __original_row_idx int64 1 17.6k | question_choices_solutions stringlengths 148 11.3k | extracted_question stringlengths 16 2.06k | extracted_answer_choices sequencelengths 1 17 | extracted_solution stringlengths 1 2.09k | improved_question_solution stringlengths 24 7.76k | qa_validation_outputs bool 1
class | classifier_reasoning stringlengths 162 2.73k |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
https://www.ttcho.com/_files/ugd/988b76_01ceeff230b24cbbb0125b2bfa3f3475.pdf | 988b76_01ceeff230b24cbbb0125b2bfa3f3475.pdf | true | 37 | 1 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "<bold>Fe2+/Fe3+</bold>\n<bold>TTCO</bold>\n<bold>Trinidad and Tobago Chemistry Olympiad</bold>\n<bo(...TRUNCATED) | 4 | "QUESTION: What is the identity of X in the reaction 14N + 1n → 14C + X? \nANSWER CHOICES: \"A. e(...TRUNCATED) | What is the identity of X in the reaction 14N + 1n → 14C + X? | [
"\"A. e\"",
"\"B. H\"",
"\"C. 13 C\"",
"\"D. 12C\""
] | B is the correct answer. | "Carbon-14 is the radioisotope of carbon with the longest half-life. It may be formed by the followi(...TRUNCATED) | true | "The question provides a nuclear reaction involving carbon-14 and asks for the identity of the produ(...TRUNCATED) |
http://chemistryrace.com/wp-content/uploads/2025/02/ChR_2025_answer_booklet.pdf | ChR_2025_answer_booklet.pdf | true | 72 | 19 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "Here is the extracted text from the provided PDF pages, including the formatting:\n\n**Page 1**\n\n(...TRUNCATED) | 43 | "QUESTION: \"Calculate how long (in hours) the electrolysis using 10 A current must run to produce e(...TRUNCATED) | "\"Calculate how long (in hours) the electrolysis using 10 A current must run to produce enough cesi(...TRUNCATED) | [
"\"free response\""
] | "57.37 h" | "Caesium metal has been obtained historically by the electrolysis of caesium cyanide: \n2 CsCN + 2e(...TRUNCATED) | true | "The question is answerable as it involves applying principles of electrolysis and stoichiometry to (...TRUNCATED) |
http://chemistryrace.com/wp-content/uploads/2025/02/ChR_2025_answer_booklet.pdf | ChR_2025_answer_booklet.pdf | true | 72 | 7 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "Here is the extracted text:\n\n<bold>Chemistry Race 2025: Questions and Solutions</bold>\n<bold>Sol(...TRUNCATED) | 39 | "QUESTION: Write the balanced equation for the disproportionation of potassium chlorate.\nANSWER CHO(...TRUNCATED) | "What is the molar concentration of air in an ordinary auditorium where Chemistry Race is held, in m(...TRUNCATED) | [
"NO CHOICES AVAILABLE"
] | 0.04103 mol dm³ | "What is the molar concentration of air in an ordinary auditorium where Chemistry Race is held, in m(...TRUNCATED) | true | "The question asks for the molar concentration of air in an auditorium, which involves applying the (...TRUNCATED) |
https://www.mit.edu/~anugrah/files/MockIChOSolutions.pdf | MockIChOSolutions.pdf | true | 39 | 3 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "Here is the extracted text with formatting:\n\n==Page 1==\n<bold>Mock International Chemistry Olymp(...TRUNCATED) | 21 | "QUESTION: Calculate the standard change in internal energy and change in enthalpy for the vaporizat(...TRUNCATED) | Calculate the boiling point of NKT-19 at Pext = 1 bar (provide the value for Tboil). | [
"NO CHOICES AVAILABLE"
] | Tboil = 276.1 K | "Calculate the boiling point of NKT-19 at Pext = 1 bar. Tboil = 276.1 K. \n\nCalculate the boiling p(...TRUNCATED) | true | "The question is answerable as it explicitly states a value for the boiling point of NKT-19 at a spe(...TRUNCATED) |
http://chemistryrace.com/wp-content/uploads/2025/02/ChR_2025_answer_booklet.pdf | ChR_2025_answer_booklet.pdf | true | 72 | 16 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "Here is the text extraction from the provided PDF pages, with formatting indicated where possible:\(...TRUNCATED) | 24 | "QUESTION: What is the concentration of Ca2+ in g ℓ−1 if 42.50 ml of EDTA solution of concentrat(...TRUNCATED) | "What is the concentration of Ca2+ in g ℓ−1 if 42.50 ml of EDTA solution of concentration 0.10 m(...TRUNCATED) | [
"NO CHOICES AVAILABLE"
] | 6.81 g ℓ−1 | "It is known that the complexation reaction between Ca2+ and EDTA proceeds in a 1:1 mole ratio. Calc(...TRUNCATED) | true | "The question involves a calculation based on a titration between Ca2+ ions and EDTA, which requires(...TRUNCATED) |
http://chemistryrace.com/wp-content/uploads/2025/02/ChR_2025_answer_booklet.pdf | ChR_2025_answer_booklet.pdf | true | 72 | 42 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "Here is the extraction of text from the provided PDF files:\n\n**Page 1:**\n\n* <bold>Chemistry R(...TRUNCATED) | 31 | "QUESTION: \"Your task is to determine how many electrons the starting materials have to lose during(...TRUNCATED) | "\"Your task is to determine how many electrons the starting materials have to lose during the forma(...TRUNCATED) | [
"\"free response\""
] | "free response answer" | "Your task is to determine how many electrons the starting materials have to lose during the formati(...TRUNCATED) | true | "The question is asking for a specific integer value related to the number of electrons involved in (...TRUNCATED) |
https://www.ttcho.com/_files/ugd/988b76_48944f6ace684143bfdc9080fca59862.pdf | 988b76_48944f6ace684143bfdc9080fca59862.pdf | true | 20 | 13 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "<bold>4.</bold> <highlighted>Pain relieving medications are an indispensable feature of modern soci(...TRUNCATED) | 59 | "QUESTION: What is the reason that preparations containing high concentrations of Aspirin, when left(...TRUNCATED) | "What is the reason that preparations containing high concentrations of Aspirin, when left exposed t(...TRUNCATED) | ["\"Vinegar is acetic acid\"","\"The aspirin must be undergoing hydrolysis in the presence of water (...TRUNCATED) | "\"The aspirin must be undergoing hydrolysis in the presence of water (from the air) to yield acetic(...TRUNCATED) | "Preparations that contain high concentrations of Aspirin, when left exposed to air, eventually begi(...TRUNCATED) | true | "The question pertains to a scientific concept regarding the chemical behavior of Aspirin when expos(...TRUNCATED) |
https://www.mit.edu/~anugrah/files/MockIChOSolutions.pdf | MockIChOSolutions.pdf | true | 39 | 13 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "==Start of OCR==\n<bold>Mock International Chemistry Olympiad / 2020</bold>\n<bold>USA-21</bold>\n\(...TRUNCATED) | 54 | "QUESTION: Calculate the voltage read by the indicator electrode in the beaker with 20 mmol added KI(...TRUNCATED) | Draw the Lewis structure of tungstate (WO₄²⁻). | [
"NO CHOICES AVAILABLE"
] | O=W=O with -0.5 for no lone pairs | "Problem 3. Wolfram, 钨, вольфрамma التنغست. Draw the Lewis structure of tungstate ((...TRUNCATED) | true | "The question is asking for the Lewis structure of tungstate (WO₄²⁻), which involves applying k(...TRUNCATED) |
http://chemistryrace.com/wp-content/uploads/2025/02/ChR_2025_answer_booklet.pdf | ChR_2025_answer_booklet.pdf | true | 72 | 24 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "Here is the text extracted from the images, with formatting as requested:\n\n==Start of Extracted T(...TRUNCATED) | 36 | "QUESTION: What is the maximum radius of the puddle at which the odour will not be detected? \nANSW(...TRUNCATED) | What is the maximum radius of the puddle at which the odour will not be detected? | [
"NO CHOICES AVAILABLE"
] | 0.2 cm | "The maximum radius of the puddle at which the odour will not be detected is calculated using the fo(...TRUNCATED) | true | "The question provides a formula and specific values that can be used to calculate the maximum radiu(...TRUNCATED) |
http://chemistryrace.com/wp-content/uploads/2025/02/ChR_2025_answer_booklet.pdf | ChR_2025_answer_booklet.pdf | true | 72 | 20 | "b'%PDF-1.7\\n%\\xc2\\xb5\\xc2\\xb6\\n\\n1 0 obj\\n<</Type/Catalog/Pages 2 0 R>>\\nendobj\\n\\n2 0 o(...TRUNCATED) | "Here is the extracted text with the requested formatting:\n\n**Page 1**\n\n<bold>Chemistry Race 202(...TRUNCATED) | 45 | "QUESTION: \"Calculate how long (in hours) the electrolysis using 10 A current must run to produce e(...TRUNCATED) | "Write the full equation of the decomposition of [Na(NH3)6]+e¯." | [
"NO CHOICES AVAILABLE"
] | 2 [Na(NH3)6]+e → 2NaNH2 + 10 NH3 + H2 | "Electrides are compounds where an electron acts as an anion, called a solvated electron. An example(...TRUNCATED) | true | "The question is based on the chemistry of electride compounds and their redox reactions. It require(...TRUNCATED) |
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