Ib chemistry past paper questions - Buy Now.

 
Study Guide and Notes; IB Style Question Banks. . Ib chemistry past paper questions

The Particulate Nature of Matter. These questions are similar to regular past paper questions, but instead of covering all topics, they focus on a specific topic or theme. Do not open this examination paper until instructed to do so. Simply enter the group and subject, then mark the fields for each tag. You are not permitted to use a calculator or the data book for Paper 1, but you should use a periodic table. Download Mathematics analysis and approaches IB past paper SL and use it for your revision. 1 The Periodic Table & Periodic Trends 3. Higher Level (HL) Paper 2. What is the formula for the compound formed by calcium and nitrogen A. Permanent dipole-dipole forces. Unparalleled videos, notes, flashcards and IB questionbank. Paper 2. IB Higher Level Past Papers PAPER 1 By Topics 817 Marks 4Students Formatted 305Pgs. In the Past Papers section, you will find full worked solutions to the questions asked on previous IB Chemistry HL Exams. Paper 2 contains short-answer and extended-response questions on the core (and Additional Higher Level (AHL) material at HL). net you can find loads of questions to do here Paper 1 Exam Questions Paper 2 Exam Questions. exam-mate prepares students for exams, assists teachers to build exam. The International Baccalaureate, formerly known as the International Baccalaureate Organization, is a nonprofit foundation headquartered in Geneva, Switzerland, and founded in 1968. Chemistry HL Paper 2 (May 2018) Download Now. Chemical bonding and structure 5. i know that its not that hard to find another site full of papers but can anyone recommend me a good one, or a one that has questions most . Cross through any work you do not want to be marked. emanuelechemistrytutor) on Instagram "Hi, guys My name is Emanuele I am 34. Jan 1, 2018. 2 mol of H 2 O 2. Acids and bases 9. it has all pat papers arranged by topic from 199 to 2013. Join now Revision Notes Concise & detailed revision notes for every topic Downloadable PDFs Designed for the DP IB Chemistry syllabus See our team of creators here GET STARTED Topic Questions. Paper 1. 3 7. IB DP Biology 40 Hrs UK Office 1 Locke Close, Harlow CM20 2GW, United Kingdom. January mocks on the horizon Kick-start your revision with our 2-day online Mock Preparation courses for Chemistry AQA and OCR (A) - 2-3rd January. Atomic Structure. IBDP Question Papers. Tutorial videos, Internal Assessment (IAs and EEs) advice for topics and questions. 3 Use the following bond enthalpies to calculate H for the following reactions. Topic 9 Oxidation & Reduction. If the reaction involves gas, equilibrium can only be reached in a closed system. IB Higher Level Past Papers PAPER 1 By Topics 817 Marks 4Students Formatted 305Pgs. (1) (ii). Data booklet provided. The attached are effectively mock Paper 1 exams in quiz format which can be used as review (US)revision (UK) at the end of the course. Exclusive IB Chemistry SL & HL question bank filtered by topic, sub-topic & difficulty supported by short video solution and explanations for each question. Avogadros constant has the same value as the number of. Redox processes 10. Do not open this examination paper until instructed to do so. Jan 14, 2018. It covers Cambridge IGCSE Past Papers, Edexcel International GCSE, Cambridge and Edexcel A Level and IAL along with their mark schemes. Atomic Structure 2. The IB Chemistry SL Questionbank is a comprehensive set of IB Chemistry exam style questions, categorised into syllabus topic and concept, and sorted by difficulty of question. Ca 2 N C. Stoichiometric Relationships 1. Download Chemistry Notes-2 PDF. Ca 2 N C. pdf Download File IB ALL Higher Level EQ Paper 3 16s, w & SpcmP 4Students 133marks 43Pgs. 20 weight. Chemistry 0620; English Second Language 0510; Coordinated Science 0654;. What is the formula for the compound formed by calcium and nitrogen A. Philosophy IB Past papers 2020 PDF. 3 7. woocommerce-product-gallery opacity 1 important; <style>. The IB Chemistry HL Questionbank is a comprehensive set of IB Chemistry exam style questions, categorised into syllabus topic and concept, and sorted by difficulty of question. 842 g of lithium using a current of 3. C 2 H 4. 5 Metallic bonding. Nov TZ0. Within each video, an experienced IB teacher will guide you through the solution, step-by-step. Availability of past papers. Affordable with multiple subscription options. 3 Use the following bond enthalpies to calculate H for the following reactions. 4 Past Paper Questions. The maximum mark for this examination paper is 35 marks. Nov TZ0. The IB Chemistry HL Questionbank is a comprehensive set of IB Chemistry exam style questions, categorised into syllabus topic and concept, and sorted by difficulty of question. Do you want to practice your stoichiometry skills for the IB chemistry exam Check out this webpage for some challenging paper 1 questions on stoichiometry core topics for both SL and HL students. Designed by the teachers at SAVE MY EXAMS for the IB Chemistry HL. Atomic Structure. N 2 H 4 (g) O 2 (g) N 2 (g) 2 H 2 O (g) Calculate the N-N bond enthalpy in Hydrazine given the bond enthalpies. Jan 14, 2018. Practice Exams, Questionbank, Past Papers Solutions, Key Concepts Summary Videos. DP IB Maths AI SL. Past Exam Questions by Topic T1SL Stoichiometric Relationships STANDARD LEVEL IB 1 SL EQ Click Here T1HL Stoichiometric Relationships HIGHER LEVEL IB 1 HL EQ Click Here T2SL Atomic Structure STANDARD LEVEL IB 2 SL EQ Click Here T2HL Atomic Structure HIGHER LEVEL IB 2 HL EQ Click Here T3SL Periodicity STANDARD LEVEL IB 3 SL EQ Click Here. IB DP Physics IB DP Maths IB DP Chemistry IB DP Biology. The questions are organized by topic and arranged by difficulty, making it the. Paper 1. 1 Ib Chemistry Past Papers 2014 Pdf Yeah, reviewing a book Ib Chemistry Past Papers 2014 Pdf could build up your near links listings. Notes on both the legacy syllabus and the new (first examination 2025) syllabus. If the reaction involves gas, equilibrium can only be reached in a closed system. Topic Questions. Download IB Past papers for Chemistry for the year. Ca 3 N 2 (Total 1 mark) 2. Activate licence . The external assessment of chemistry consists of three written papers. Here are a few ways that you can use past papers to help you prepare Familiarize yourself with the exam format The IB Chemistry HL exam has a specific format that you should become familiar with before you take the test. 06 ccd 94 K 74888 m seconds. Taking the IB Chemistry exam will be a nerve-wracking experience, but having seen a real IB past paper before taking the actual test will be a huge advantage since you&39;ll have experience with the test format, the length, and style of the test. It has some similarities to Option B in that it deals with some. Detailed Past Paper Video Solutions In-depth reviews of past paper questions with analysis of IB MCQ and structured question-answering strategies. What amount of Oxygen, O 2, (in moles) contains 1. RevisionDojo is your all-in-one platform for studying the IB. That marks the end of our review for paper 3. Within each video, an experienced IB teacher will guide you through the solution, step-by-step. Nov TZ0. Periodicity 4. it has all pat papers arranged by topic from 199 to 2013. Practice Papers. A closed system is one in which none of the reactants or products escape from the reaction mixture. For past papers before May 2022, as well as. 1 mol of CH 3 COOH. Revision Notes Topic Questions Practice Paper Questions. Elevate your preparation and ace your exams . 64 g of. All subjects including Mathematics, Chemistry, Biology and Physics Past Papers. Question 14. The reaction between KHP and NaOH is given below. 1 Introduction to the particulate nature of matter and chemical change. The plum pudding model of the atom was then developed. The external assessment of chemistry consists of three written papers. 2017-2022 QuestionsMarkSchemes MayJune OctNov All time zones PDF file Printable. A calculator is required for this paper. 0 cm3 solutions of a weak acid and a strong acid of the same concentration are titrated with NaOH solution. What is the Kb value for its conjugate base A. Browse 67 exam-like sub-questions inspired by past IB papers Topic 1 Stoichiometric Relationships Quiz 100 Free 8 sub-questions Topic 2 Atomic Structure Quiz 6 sub-questions. Paper 2. You can also find the answers and explanations at the end of the page. 1 Introduction to the particulate nature of matter and chemical change. Topic 2 Questions. Paper 1. Full worked solutions to all past paper questions, taught by experienced IB instructors. Paper 2. international baccalaureate ib hl chemistry higher level exam past or previous papers questions & answer, syllabus, data booklet for high school students. IB Chemistry (Ellesmere College) Home. These pages contain questions written directly in the style of examination questions. Acids and bases 9. IB DP Physics IB DP Maths IB DP Chemistry IB DP Biology. International Baccalaureate IB Chemistry Past Papers Standard Level (SL) International baccalaureate (IB) is an International Non-profit Organization, which offers Four high-quality International education Programmes (Primary Years, Middle Years, Diploma, & Career-related) to students from age of 3 to 19 in more than 146 countries. IB Biologa NS IB Chemistry HL > > > > Other resources for students. X and Y B. IB Chemistry - Topic 5 - 5. Formula is Q (Charge) I (Current) x T (Time) Answer. In paper 1 there are 30 (at SL) or 40 (at HL) multiple-choice questions. 4 Past Paper Questions 1. Stoichiometric relationships. box 0 1. ASC file) If you want to know about what resources exist check the IB Documents Team Resources Guide. (ii) State the conditions under which, if at all, each Chloride conducts electricity. Here are a few ways that you can use past papers to help you prepare Familiarize yourself with the exam format The IB Chemistry HL exam has a specific format that you should become familiar with before you take the test. Paper 1. FREE Chemistry revision notes on Elements, Compounds & Mixtures. Paper 2 Higher broken down by topics in individual zipped files. 1 Fundamentals of organic chemistry SL Paper 1. I have been using InThinking IBDP Chemistry for many years and I am a great admirer of this brilliant resource for us, teachers, and, our students It is undoubtedly the best site for planning, teaching and learning "IB Chemistry" as it is. In the Past Papers section, you will find full worked solutions to the questions asked on previous IB Chemistry HL Exams. CIE Edexcel. Download IB Past papers for Chemistry for the year 2021 standard level plus marking schemes free download in PDF format and use them for your revision. 1 Describe and give examples of random uncertainties and systematic errors SL IB Chemistry Watch on. IBDP Physics SL &HL. After 2016 all questions became compulsory on Paper 2 Chem 1 Chem 2 Chem 3 Chem 4 Chem 5 Chem 6 Chem 7 Chem 8 Chem 9 Chem 10 Chem 11 P1 2016 12. Here are a few ways that you can use past papers to help you prepare Familiarize yourself with the exam format The IB Chemistry HL exam has a specific format that you should become familiar with before you take the test. IB Chemistry - Topic 5 - 5. Write your session number in the boxes above. It covers Cambridge IGCSE Past Papers, Edexcel International GCSE, Cambridge and Edexcel A Level and IAL along with their mark schemes. Introduction to D. X and Y - B. You can hone your skills on important concepts using the Chemistry SL - 2024 Popular Quizzes, or ascend the Chemistry SL - 2024 Revision Ladder to reach the hardest questions in the IB Finally, full length RV-exclusive Chemistry. Paper 2. 3 7. igcse ib past papers download mathematics solutions. box 0 1. 1 Measuring Energy Changes Subject Chemistry Age range 16 Resource type Lesson (complete) 0 reviews File previews pptx, 5. Using past papers is an excellent way to prepare for any exam, including the IB Chemistry HL exam. The IB Chemistry HL (Higher Level) 2024 Practice exams are the perfect resource to customize your revision plan. Stoichiometric relationships. Browse 67 exam-like sub-questions inspired by past IB papers Topic 1 Stoichiometric Relationships Quiz 100 Free 8 sub-questions Topic 2 Atomic Structure Quiz 6 sub-questions. i know that its not that hard to find another site full of papers but can anyone recommend me a good one, or a one that has questions most . Mar 1, 2023 These questions are organised according to the topics in the Core (SL & HL) and AHL (HL only) content. Electrons are lost from zinc atoms. y Answer all questions. Detailed Past. Students can use it to access questions related to topics, while teachers can use the software during. Materials; Topic 3 SL Past Papers Questions & Answers Download; Topic 3 HL Past Papers Questions & Answers Download. IBDP Chemistry HL Past Year Papers 1. Psychology IB Past papers 2020 PDF. The forward reaction is endothermic. 1 - Matter & Chemical Change Elements, Compounds, Mixtures, Balancing Chemical Equations, States of Matter at a Particle Level, Changes of State 1. Study Guide and Notes; IB Style Question Banks. ago getting kicked out dp2 312 46 rIBO. What amount of Oxygen, O 2, (in moles) contains 1. Using past papers is an excellent way to prepare for any exam, including the IB Chemistry HL exam. 2 mol of NH 3. IGCSE Past Question Papers. 0030 B. Complete the table below by calculating the missing variables of the ideal gas equation. These questions are organised according to the topics in the Core (SL & HL) and AHL (HL only) content. Students can download the IB sample question papers for the below-mentioned subjects Chemistry English French History Informational Technology Mathematics Spanish Importance of IB Sample Papers Kindly go through the following guidelines to find out the importance of IB past papers. Paper 1 style questions are multiple choice. Using past papers is an excellent way to prepare for any exam, including the IB Chemistry HL exam. 1 Measuring Energy Changes presentation with links to videos, and past paper questions. ITGS IB Past papers 2020 PDF. CIE IGCSE Chemistry. They are provided for information only. The reverse reaction is favoured by high temperatures. Mr Wengs IB Chemistry. Energy is released when bonds are formed and when they are broken. CHEMISTRY HIGHER LEVEL PAPER 1 INSTRUCTIONS TO CANDIDATES Do not open this examination paper until instructed to do so. Computer generated questions for students and teachers on all topics; Video explanations of concepts and content. You should use a calculator and the data book for these questions. Easy, Medium and Hard challenge yourself. (ii) State the conditions under which, if at all, each Chloride conducts electricity. Topic Questions; Revision Notes; Past Papers; OCR. Data Questions. Write your session number in the boxes above. CaN B. 2 - The Mole Concept Moles, Molar Mass, Mass, Molecular Formula, Empirical Formula. Download All Biology International Baccalaureate (IB) HL Past Question papers 2021 Group. pdf Download File IB ALL Higher Level EQ Paper 3 16s, w & SpcmP 4Students 133marks 43Pgs. IB Higher Level Past Papers PAPER 1 By Topics 817 Marks 4Students Formatted 305Pgs. IB Math AA SL AA HL AI SL AI HL IB Biology Biology SL Biology HL IB Chemistry Chemistry SL Chemistry HL. In the Past Papers section, you will find full worked solutions to the questions asked on previous IB Chemistry HL (Higher Level) 2024 Exams. Nov TZ0. Best tool to prepare for exams. Live Class - AS Chemistry - Hess Law, Drawing Hess CyclesFor more Video Lectures for O Levels, A Levels, IB Diploma, AP Courses & EdexcelHesss law, also ca. The periodic table is provided for reference on page 2 of this. Sail through the IB with Tiber Tutor. Our revision material is all divided by the international baccalaureate sub-topics, covering topics 1 to 21. Download Chemistry Notes-3 PDF. low melting point and reacts vigorously with water. What decreases the value of the rate constant a decrease in the reaction temperature. What are the units of a the rate constant for a zero-order reaction mol dm (-3) s (-1) What factors affect the rate constant, k, of a reaction catalyst. Paper 2. Topic 1 Stoichiometric Relationships Quiz 100 Free. Tailored questions for specific GCSE, IGCSE, IB and A Level exams. 1 Matter, Chemical Change & the Mole Concept 1. 9MB Group 4 Experimental sciences. Detailed Past Paper Video Solutions In-depth reviews of past paper questions with analysis of IB MCQ and structured question-answering strategies. < IB Chemistry SL & HL Question Banks PDF STANDARD LEVEL Multiple Choice Question Short Answer Extended Theory HIGHER. DP IB Chemistry SL Topic Questions Past paper and exam-style questions organised by topic, with student-friendly answers written by teachers and examiners. Tutorial videos, Internal Assessment (IAs and EEs) advice for topics and questions. Paper 1; Paper 2; IA; On-Screen MCQs; Topicwise MCQs. A clean copy of the. Feb 1, 2022 Chemistry IB Past papers 2021 HL Group 4 Chemistry International Baccalaureate past questions. Chemistry higher level paper 3 374KB Group 5 Mathematics and computer science. CHEMISTRY HIGHER LEVEL PAPER 1 INSTRUCTIONS TO CANDIDATES Do not open this examination paper until instructed to do so. Find out when we publish question papers and mark schemes on our website. com WhatsApp Chat Join WhatsApp Group. Topic 1. 2 Reacting Masses & Volumes. law of assumption success sp reddit, craigslist las cruce

IB Chemistry Exam Questions Sorted by Topic & Difficulty. . Ib chemistry past paper questions

Designed by the teachers at SAVE MY EXAMS for the IB Chemistry SL. . Ib chemistry past paper questions flinn pavo

IB DP Chemistry SL- IB Style Practice. 2 Reacting Masses & Volumes 2. IB Past Papers This site has all the past papers, textbooks and Question Banks. Access to all exemplars. Here we have a collection of Chemistry Group 4 IB past question papers to help you prepare well for your examination. (1) (ii) Draw an enthalpy level diagram for this reaction, including labels for H, Ea and the activation energy when a catalyst is used, Ecat. Element present in the compound formed when X is in group 2, and element Y in group 7, of the periodic table. All subjects including Mathematics, Chemistry, Biology and Physics Past Papers questions have been categorised in same topics IGCSE CAMBRIDGE Topical past papers. The IB Chemistry HL (Higher Level) 2024 Practice exams are the perfect resource to customize your revision plan. 2K views 1 year ago IB IGCSE IBDP In this video I have solved all the. Maths standard level paper 2 447KB. IB Chemistry HL - Past Papers. Ca 2 N 3 D. Do all rough work in this book. Data booklet provided. IB Chemistry Solutions Keys 2000. However, the number of questions set on each topic relates to the recommended time to be spent teaching each topic. 7 to D. Ca 2 N C. The reaction between KHP and NaOH is given below. Past papers. Jan 14, 2018. Negative ions flow through salt bridge from the zinc half-cell to copper half-cell. Topic 1. Topic 2 Questions. You can hone your skills on important concepts using the Chemistry HL - 2024 Popular Quizzes, or ascend the Chemistry HL - 2024 Revision Ladder to reach the hardest questions in the IB Finally, full length RV-exclusive Chemistry HL. Full worked solutions to all past paper questions, taught by experienced IB instructors. Past Papers by Subject. Practice more 360 important questions on Chemistry. The IB Chemistry SL Questionbank is a comprehensive set of IB Chemistry exam style questions, categorised into syllabus topic and concept, and sorted by difficulty of question. The IB Chemistry SL Paper 3 Question Bank is a great resource for students studying for the IB Chemistry SL exam. Within each video, an experienced IB teacher will guide you through the solution, step-by-step. Do the same as above with the melting points of chloromethane, chloroethane, 1-chloropropane, 1-chlorobutane and 1-chloropentane, H-bonding. Tip 2 Past Papers When it comes to multiple choice questions doing past papers to review is the best possible practice. Mar 1, 2023 Paper 1 Exam Questions Stoichiometry core (SL & HL) paper 1 questions Atomic Structure core (SL and HL) paper 1 questions Atomic Structure AHL (HL only) paper 1 questions Periodicity core (SL and HL) paper 1 questions Periodicity AHL (HL only) paper 1 questions Bonding and Structure core (SL and HL) paper 1 questions. IB Chemistry Solutions Keys 2000. With 11 lectures, spanning over 3 hours of elite video content, 39 chapter-divided notes crafted to alleviate the struggles. Does anyone have chemistry p1 or p2 questions specific for a certain topic in chemistry I mostly have past papers but as I have not yet . It covers Cambridge IGCSE Past Papers, Edexcel International GCSE, Cambridge and Edexcel A Level and IAL along with their mark schemes. Organic chemistry core (SL & HL) paper 2 questions. Chemistry HL Paper 1 (May 2019) Download. Topic 01 - Stoichiometric Relationships. X 2 and Y. Mar 19, 2023 Past IB exam papers are a good source for students to practice but they do not explain the answers. In paper 1 there are 30 (at SL) or 40 (at HL) multiple-choice questions. Acids and bases 9. Click on the menu options below to go to the relevant section Stoichiometry (quantitative chemistry) Atomic theory Structure and bonding Periodicity Energetics and thermodynamics Kinetics Equilibrium systems Acids and bases Oxidation and reduction Organic chemistry Data analysis General resources Allow cookies. c) Speeds up chemical reaction. Y D. Which species is an anion A. For each question, choose the answer you consider to be the best and indicate your choice on the answer sheet provided. X and Y - B. Paper 1. It covers Cambridge IGCSE Past Papers, Edexcel International GCSE, Cambridge and Edexcel A Level and IAL along with their mark schemes. IB Biolog&237;a NS IB Chemistry HL > > > > Other resources for students > > > > Topic 7 and 17 - Equilibrium. Youtube Channel. We need to check the number of atoms present one by one. Paper 2 contains short-answer and extended-response questions on the core (and Additional Higher Level (AHL) material at HL). Redox processes 10. A clean copy of the chemistry data booklet is required for this paper. Tip 2 Past Papers When it comes to multiple choice questions doing past papers to review is the best possible practice. C 3 H 6. Easy, Medium and Hard challenge yourself. After 2016 all questions became compulsory on Paper 2 Chem 1 Chem 2 Chem 3 Chem 4 Chem 5 Chem 6 Chem 7 Chem 8 Chem 9 Chem 10 Chem 11 P1 2016 12. Nov TZ0. All of these questions are written by topic, to mimic the style of IB questions that you&39;ll get on your papers. Energy is absorbed when bonds are formed and when they are broken. IBDP Chemistry HL Past Year Papers. Chemistry HL Paper 1 (Nov 2018) Download Now 4. Stoichiometric relationships 2. Here are a few ways that you can use past papers to help you prepare Familiarize yourself with the exam format The IB Chemistry HL exam has a specific format that you should become familiar with before you take the test. Paper 2. exam-mate is an exam preparation and exam builder tool, containing a bank of topical and yearly past papers. Availability of past papers. Using past papers is an excellent way to prepare for any exam, including the IB Chemistry HL exam. The maximum mark for this examination paper is 35 marks. IB Chemistry SL. 1 Introduction to the particulate nature of matter and chemical change. 1 Types of Organic Reactions. View PDF List. Mar 1, 2023 These pages contain questions written directly in the style of examination questions. Using past papers is an excellent way to prepare for any exam, including the IB Chemistry HL exam. 800g of a gaseous compound with an empirical formula of CHCl. Official IB Chemistry Past Papers - Video Solutions. of Questions 9 10. SL Paper 1. 3 Past Paper Questions 3. Electrons flow from the copper half-cell to the zinc half-cell. Economics IB Past papers 2020 PDF. Practice Exams, Questionbank, Past Papers, Videos. Download IB past papers Chemistry 2022 HL & SL (Tz1, Tz2 in French, German, Spanish & English). Organic chemistry AHL (HL only) paper 2 questions. Here we have a collection of Chemistry Group 4 IB past question papers to help you prepare well for your examination. 1 Spectroscopic Identification of Organic compounds. The external assessment of chemistry consists of three written papers. IB Math AA SL AA HL AI SL AI HL IB Biology Biology SL Biology HL IB Chemistry Chemistry SL Chemistry HL. IB SL Topic 1 EQ Paper 2 Section A & Section B 16w to 99s 145marks Before 2016 paper 2 was included 4 section B questions, of which you had to chose 2. Paper 2. Energetics Thermodynamics 6. Here are a few ways that you can use past papers to help you prepare Familiarize yourself with the exam format The IB Chemistry HL exam has a specific format that you should become familiar with before you take the test. Periodicity 4. IB chemistry past papers solutions chemistry paper 1 chemistry topic wise solution chemistry HL & SL Past papers solution Ib chemistry On Screen solution Skip to. Organic chemistry AHL (HL only) paper 2 questions; Measurement core (SL & HL) paper 2 questions; Measurement AHL (HL only) paper 2 questions; Periodic table. File Size 21 kb. File Size 273 kb. Paper 2. Topical past papers of IGCSE, A-Level and IB Diploma. Feb 6, 2022 Free download IB Past papers of Chemistry 2020 International Baccalaureate past questions PDF from here for free. 40 weight. The questions are organized by topic and arranged by difficulty, making it the. y Answer all questions. Chemistry HL Paper 2 (May . These pages contain questions written directly in the style of examination questions. 1 The Particulate Nature of Matter. The attached are effectively mock Paper 1 exams in quiz format which can be used as review (US)revision (UK) at the end of the course. Chemical bonding and structure 5. Answer all of the questions from one of the options. exam-mate is an exam preparation and exam builder tool, containing a bank of topical and yearly past papers. . 20 free tiktok likes