Board Exams

Board Exams

Chemistry BOARD MASTER STROKE 2019

PUBLISH DATE 24th February 2019

STRESS FREE EXAM BOARD MASTER STROKE (HSC 2019)

Subject : Chemistry

Authors : Mrs. Chitra Samudra, M.Sc. B.Ed.

                  Mrs.  Kalpana Desai, M.Sc. B. Ed.

Hello,

This is the time when students would have completed most of their preparation for the upcoming board examination.

Board examinations are very stressful in the career of a student. Take your study seriously but do not get this seriousness overcome your confidence. Always think positive about your examination. Positive attitude towards examination is the main important fact which you should have in yourself to crack your examination successfully.

First of all ensure that you are well versed with each concept and topic in your text book. Do not ignore diagrams, tables, graphs in the text book as question can be asked from text book only.

By this time students might have solved the papers from ”Shikshan Sankraman” published by board. If not solved, at least solve it orally without option.

Go through the other papers that you have solved and checked by your teachers. Take a self feed back and try to improve your accuracy in all questions.

All of you are aware that questions are distributed in four sections. Let us take a review of each section.

Section A contains multiple choice questions and very short type questions.

Preparation for this section requires thorough and detailed reading of textbook. Focus more on the words which are specific and rare. For example holmes signal, miner’s cap, Freron etc. Mostly these words are observed in chapter 7, p block elements.

While solving theory part of MCQ,----1) Read the questions carefully. Sometimes words like NO, NOT or INCORRECT are given in questions. See it and then answer correspondingly. 2) Use shortcut method to solve such questions 3) No need to write complete equation. 4) only option and answer is expected.

For MCQ numerical ---- Use short cut method to get correct answer. For example; for the formula of maximum work for 1 mole,

Wmax  = - 2.303 nRT logV2/V1

Wmax = -19 T  logV2/V1

For very short answer type questions, your answer should be either in one word or in one line.

Section B is of 2 marks. This section includes short answer questions like define, draw diagram, distinguish, statement of laws, uses/applications, mechanism, chemical equations etc.

For definitions & statement of laws always use book language, technical words given in the book. While reminding statement of laws see that it should be accompanied with mathematical expression. One important tip here is that do not get confused with Henry’s law and Hess’s law.

Diagram – practice proper diagram with proper labeling. For cell diagram like dry cell, fuel cell etc anode and cathode marking is important. Without that it has no meaning.

Chemical equations – It should be balanced. Conditions such as temperature, pressure, catalyst are important. If the side product is in gaseous state then show it with arrow in upward direction.

Structures – Draw the structures with pen and not with pencil. Show proper bonding and valency. This is applicable for any organic compound. Structures of monomer, polymer, saccharides, aspirin, saccharine, nucleotide, nucleoside, BHT, BHH are frequently asked.

Section C and D are long answer questions either of 3 marks or 5 marks.

These questions are descriptive like short note, derivations, mechanism etc. For preparation of such questions revise their answer point wise. For example, description of cell – points are principle, diagram, construction, working, representation and voltage. Like this prepare the answer for amphoteric

Oxide, abnormal masses, manufacture of H2SO4, HNO3 etc.

Remember in these questions 2 or 3 questions are clubbed together. There may be the possibility of forgetting next sub question. So take care of it. Please check whether the answer is related to question or not.

Derivations – Start with proper formula. Write each and every step. Draw diagram if applicable.  Particularly for derivation of work done.

Mechanism – Always show arrow from electron rich to electron deficient site. Ensure that charges from both sides must be balanced. Mention whether it is reversible or irreversible reaction.

Numerical part : There are about 20% numericals in each paper.

To prepare for this part – memorize certain formulae, make list of all the formulae chapter wise. Always keep these formulae in front of you. Simultaneously memorize conversions of simple units. Also learn by heart logs of some constant value like 8.314, 2.303, 0.693, 0.059 etc.

While solving the numericals use the proper formulae. Substitute the values with correct units. Show log calculation. Write the exact answer with proper units.

Last but not the least – stay relaxed and stress free. Be self confident about your preparation for the examination.

Wishing you all the best.