Mystery In Chemistry

Haloalkanes & Haloarenes-Intext Questions #10.2 Expert educator Dr Anupa Medhekar explains why is Sulphuric acid not used? The question is from NCERT Chemistry /Class-12/ Chapter-10

Haloalkanes & Haloarenes-Intext Questions #10.1 Expert educator Dr Anupa Medhekar explains how to write structures of different compounds, if name is given. The question is from NCERT Chemistry /Class-12/ Chapter-10

Hello Students. Here is 15th Tip to help you score 100/100 in chemistry. Check Your Answer-sheet before submitting. After finishing the paper, check your answers completely, before submitting it to the invigilator. By this you can rectify your mistakes. In case you spot any mistake, correct it, even if that makes your answer sheet- a bit untidy. In fact, you should keep last 20 minutes, before the final bell, to check your answers. OK. What else to do in final check? 1. Check Your Name / Roll No. on the Answer sheet. There are times when failing to put your name on the answer sheet will result in a failing grade. An answer sheet that doesn’t have a name attached to it will be tossed out. 2. Check all the Question numbers before the answer. Make it a habit of writing the question number clearly first before writing the answer. 3. Check all the questions attempted and leave no blank space for any answer. There is no negative marking for wrong answers in board exams. If ti...

Hello Students. Here 14th tip to help you score 100/100 in chemistry. Always make your answers clear and presentable. Along with writing the correct answers, presentation matters a lot. Your answers should be so visually appealing to the examiner so that he/she need not put any extra effort to go through your answer script. Moreover, best answers are the ones which assure the examiner even without reading that whatever you have written is correct and you deserve full marks. Now how to Make your answers clear and presentable. Most of the points we have already discussed in previous videos. Let us recall all the points 1. Write the answers in a legible writing and to the point. 2. Don’t decorate the Answer sheet. Few students have this habit of attempting questions in a colorful manner by using red, green and black markers. It is simply waste of time and not going to help in gaining any extra mark. Use only two pens; a blue pen for writing the text and black for headings....

Here is the 13th tip. Assertion & Reason! An easy way to solve! Part 2: How to solve Assertion/ Reason questions? Most of the Assertion & Reason questions are very simple. But just reading tips and answering may not be that effective. Tips are great to make your own strategies to tackle the exam questions Let us have a closer look. Go stepwise to solve them. Here is Example-1 Keep the option shortcut ready. Here options are ABCD, A&R are Assertion and Reason & T, F representing True and False. So the First step is read assertion statement carefully and think whether it is true or false? 1. Assertion: Molarity of a solution in liquid state changes with temperature. It is True. As we know molarity is moles/litre and litre is indicating volume of solution, which changes with temperature so molarity also changes with temperature. So assertion is True Now read the Reason. And think independently -it is True or False? Reason: The volume of a solution changes with a ch...

Here is the 13th tip- Assertion & Reason! An easy way to solve! Part 1: Preparation Assertion and Reason questions are a recent addition to the CBSE paper, but it is a very important part of almost all entrance examinations. These questions are a bit tricky. First, what is assertion/ reason type question? In Assertion – Reason type of question, students are provided with two statements named “Assertion” and “Reason”. Assertion- means a simple statement. Reason- is explanation for the assertion. Read the statements carefully and choose the correct option. Options will be A. Both the Assertion and the Reason are true and the Reason is the correct explanation of the Assertion. B. Assertion and the Reason are both true but the Reason is not the correct explanation of the Assertion. C. Assertion is true but the Reason is false. D. Both the statements are False. Best way is - Write at the corner of the page, in abbreviation, a clear picture of options available for A/R questions, i...

Hello Students ! Welcome to Mystery In Chemistry’s Tips & Tricks series. Understanding chemistry and scoring high in exams are two different things and hence require different set of skills. Let us learn the 12th tip to help you score 100/100 in chemistry. So, here is the 12th tip. How to solve Multiple Choice Questions? Multiple choice questions or MCQs are most scoring questions. However, getting the correct answer is quite difficult thing. Let us discuss some tricks to crack MCQs. But remember, these tricks are only needed, when you have no clue about the correct answer. First point. Analyze question carefully, before choosing the right answer. Next If there is no negative marking, attempt all MCQs. Read the complete question. Like Ex 1…..d. all of the above So here just after reading '"a" you may decide, it is the correct choice. But on further reading you may discover "b" and "c" are also right, so "d" all of the above is the c...

Hello Students. Welcome to Mystery In Chemistry’s Tips & Tricks series. Understanding chemistry and scoring high in exams are two different things and hence require different set of skills. Let us learn some tips and tricks to help you score 100/100 in chemistry. So the 11th tip is simply, Focus & Concentrate on what you know during the examination. You will invariably come across a question that completely stumps you out and can easily derail your time management. It can be a Multiple Choice Question, a numerical problem, a short or long answer question, anything - that you just can not deal with right now. The only way is to move on … So Focus on what you know during the examination. But How? Students have all kinds of doubts and uncertainties on the exam day. Almost everyone feels some kind of tension, or nervousness that day. But it is important to leave all that outside the exam room. Here are some tips to focus and concentrate while writing your exam: Walk in wit...

Hello Students. Welcome to Mystery In Chemistry’s Tips & Tricks series. Understanding chemistry and scoring high in exams are two different things and hence require different set of skills. Let us learn the 10th tip to help you score 100/100 in chemistry. So here is the 10th tip. Make the most of reading time before Examination starts. Most Board examinations provide reading time before writing begins. During reading time, students are permitted to read the exam paper but not use pen or pencils, nor mark the paper in any way. Some students find reading time frustrating. They just want to start writing at the earliest. But a planned and systematic approach to reading time will help you tackle the exam paper more efficiently and effectively – giving you a significant advantage provided - you use it properly. What to do during reading time! Let's go through the first moments of the exam. You need a strategy! First, calm your nerves and settle into the groove of the thi...

Hello Students. Welcome to Mystery In Chemistry’s Tips & Tricks series. Understanding chemistry and scoring high in exams are two different things and hence require different set of skills . Let us learn some tips to help you score 100/100 in chemistry. So here is the 9th tip - A picture is worth a thousand words. So Start With A Diagram While Answering Descriptive Questions. The best way to answer a descriptive question is clearly draw the diagram related to the question first. It can be a graph, an equation or even a free hand sketch. Then start writing looking at the diagram. Your thoughts will be precise and the answer will require less time to be composed. Moreover, it will be easy for the examiner to understand that whatever you have written is correct, because the diagram is correct. Suppose the question is - Account for the following : Although Fluorine has less negative electron gain enthalpy yet F2 is strong oxidizing agent. Why? (3 Marks) Now for this question...

  Hello Students. Welcome to Mystery In Chemistry’s Tips & Tricks series. Understanding chemistry and scoring high in exams are two different things and hence require different set of skills. Let us learn the next tip to help you score 100/100 in chemistry. Here is the 8th tip - Use Chemical Equations To Solve Organic Questions - Concisely. Questions on organic chemistry range from conversion, complete the reaction, what happens when, write the mechanism, explain the given Name reaction or reasoning. The common trick across these different type of questions is essentially use the chemical equation in your answer. Now, let us take an example. Suppose the question is - How do you convert the following : (i) Phenol to Anisole (ii) Ethanal to Propan-2-ol For all organic chemistry questions you need to be very clear about structural formula, name of the compound and chemical equations. It is because 90% of the answer in organic chemistry can be expressed in equations. Even the exam...

Hello Students. Welcome to Mystery In Chemistry’s Tips & Tricks series. Understanding chemistry and scoring high in exams are two different things and hence require different set of skills. Let us learn some tips and tricks to help you score 100/100 in chemistry. So here is the 7th tip - Use tabular format to answer questions where necessary. Many questions warrant an answer in tabular format. For example, questions around listing out differences or asking you to compare two things, can be answered briefly and clearly in a tabular format. Here, is one such question - Write two differences between an ideal solution and a non-ideal solution. It is 2 marks question. So you have 5 minutes to answer it. You should be able to recall the following points - raoult’s law, mole fraction, ideal solution, non ideal solution, negative and positive deviation, ΔHmix, ΔVmix and partial pressure. However, you must realize that answering the question in descriptive manner is not going to wo...