Odisha BSE HSC General Science exam-day guide
Odisha BSE HSC General Science · Prepare for the day ahead.
Your checklist
Admit card / hall ticket (original)
Keep the original, printed hall ticket issued for the HSC examination in a clear plastic sleeve so it does not crease or get wet. Some centres also ask for a photocopy; confirm with your school exactly which documents the centre will collect or verify. If your admit card is lost or damaged, tell your school head immediately rather than arriving without it.
School uniform or dress code as prescribed
Wear the uniform your school has told you to wear for practical examinations, with closed shoes rather than sandals or slippers, since you will be standing at a laboratory bench and handling glassware, flames and chemicals. Tie back long hair and avoid loose sleeves, flowing dupattas or dangling jewellery near burners and reagent bottles.
Completed and signed practical record book
Bring your practical record book (practical file / laboratory manual) with every experiment written up, diagrams drawn in pencil, observations filled in, and teacher's signature and date on each experiment. Many centres collect it for internal assessment at the start of the examination; confirm with your school whether it is collected on the practical day or earlier in the term.
Pen, pencil, eraser, sharpener and a small ruler
Carry two blue or black ballpoint pens, one sharpened HB pencil for diagrams, an eraser, a sharpener and a 15 cm ruler. Use pencil only for drawings and pen for written answers; a diagram drawn in pen can lose marks. Carry these in a transparent pouch if your centre requires transparent stationery.
Simple calculator - only if your centre allows it
Calculations such as resistance from V and I, or magnification from object and image distances, may need a calculator. Many centres allow only a non-programmable simple calculator and some allow none, so confirm with the provider before depending on one, and practise doing the arithmetic by hand as a fallback. Never carry a programmable or graphing calculator, a smart watch or a phone into the laboratory.
Know your reporting time, centre and bench instructions
Confirm the exact reporting time, the laboratory block and the batch or roll-number grouping for your practical from your school at least a week before, because practical batches are usually split into small groups with staggered timings. Reach the centre well before the reporting time - arriving late can mean you lose your turn in a batch that has already been seated.
Revise the full list of experiments your school taught
For each experiment, be able to write the aim, apparatus required, theory or formula, procedure in numbered steps, observation table with column headings and units, calculation, result and two or three precautions. Typical Class X General Science practicals include verifying laws of reflection and refraction through a glass slab, finding the focal length of a concave mirror or convex lens, verifying Ohm's law, studying series and parallel combinations of resistors, testing pH with litmus and universal indicator, reactions of acids and bases, food tests for starch, protein and fat, preparing a temporary mount of onion peel or leaf epidermis, and demonstrating osmosis or transpiration.
Practise labelled diagrams on plain paper
Redraw the standard diagrams - ray diagrams for mirror and lens, the refraction slab setup, the circuit diagram, the slide mount - at least twice from memory. Label with a pencil, keep the labels horizontal, and use dotted lines for normals and construction lines. Neat, correctly labelled diagrams usually carry dedicated marks in the practical answer sheet.
Prepare for the viva voce
Expect short oral questions on why a precaution matters, what a control is, units, and sources of error - for example why the parallax error must be avoided, why the glass slab is placed on paper, why the leaf must be boiled in alcohol before the starch test, or why resistances are connected in series in one circuit and parallel in another. Be able to state the principle behind every experiment in one sentence.
A transparent water bottle, if your centre permits
A clear, unlabelled water bottle is usually acceptable in the laboratory, but confirm with the provider; opaque bottles, tiffin boxes and bags are often kept outside the laboratory. Eat a proper meal before leaving home, since practical batches can run long and you will be standing and handling apparatus.
Read the safety instructions for the laboratory
Know before you enter: never taste a chemical, never smell a reagent by putting your nose directly over the mouth of the bottle (waft the vapour towards you), never point a test tube being heated towards yourself or a neighbour, and report any breakage, spill or burn to the invigilator at once instead of cleaning it yourself.
Plan the day
Make a one-page summary sheet for every experiment in your syllabus with only aim, formula, observation table headings, result and precautions. Write it by hand, because the act of writing is what you will recall at the bench. Then, for each experiment, say the procedure aloud in four or five steps without looking at the book - this is exactly the level of detail the practical answer sheet asks for.
Finish the practical record book. Check that every experiment has a date, a teacher's signature, a completed observation table and a pencil diagram. A record book with blank observation columns or unsigned pages can cost internal marks, and there is no time to fix it on the morning of the examination.
Run through the arithmetic you are likely to need - converting milliampere to ampere, calculating mean values, using the lens formula, computing magnification, computing percentage error. Do a couple of sample calculations by hand so that you are not dependent on a calculator being allowed.
Confirm your batch, reporting time and centre with your school, and check the route and travel time to the centre. Lay out the uniform, admit card, record book, stationery pouch, calculator (if allowed) and water bottle together in one place so nothing is hunted for in the morning.
Do a final light revision of only the summary sheet and diagrams - no new experiments, no late-night cramming. Sleep at your normal time. Practical marks come from steady hands and clear write-ups, and both suffer badly from a short night.
Eat breakfast, dress in the prescribed uniform with closed shoes and hair tied back, and leave early enough to reach the centre before the reporting time with a margin for traffic. Carry only what the centre permits; leave the phone and any smart device at home or with a guardian, since a device found in the laboratory can be treated as unfair means.
Find the notice board listing your batch, roll number and laboratory room, and be seated when asked. Keep the admit card and record book ready for verification, listen to the instructions given at the start, and note whether you must use the answer sheet provided by the centre or your own ruled sheets.
Read the whole question paper before writing. Choose the experiment you can write up completely and correctly rather than the one that looks shortest, and start with the aim, apparatus and theory so that the initial marks are banked even if the observation time runs short.
Set up the apparatus yourself, check with the invigilator that the circuit, mirror or slide is correctly placed before taking readings, and record every reading straight into the observation table in ink with units in the column headings. Never invent a reading - a consistent set of honest values with a sensible result scores better than perfect-looking numbers that contradict your own procedure, and examiners often check whether your result follows from your readings.
Complete the calculation, state the result with units, and write two or three specific precautions that actually relate to your experiment rather than generic ones. Check that every diagram is in pencil and labelled, that the pages are numbered, and that your roll number is written where the invigilator instructed before you hand in.
Answer briefly and honestly. If you do not know, say so and offer what you do know about the principle involved - examiners mark understanding, not confidence. Speak clearly, keep the answer to one or two sentences, and do not argue about marks at the bench.
Rules to check
Carry your original admit card and any identity document your school has asked for, and keep them with you until the examination is over. If the centre asks for documents you were not told about, ask your school head to intervene rather than leaving the centre; the exact list can differ between centres, so confirm with the provider beforehand.
Mobile phones, smart watches, Bluetooth earbuds, programmable calculators, books, notes and loose paper are not allowed inside the laboratory. Keep your record book closed unless the invigilator asks you to submit it or open it, and do not borrow stationery, reagents or apparatus from another candidate - ask the invigilator instead.
Follow the safety instructions of the laboratory at all times: wear closed shoes, tie back long hair, do not eat, drink or taste anything at the bench, waft rather than sniff vapours, keep flames away from your face and clothing, and report breakage, spills or burns immediately. Deliberately damaging apparatus or disregarding a safety instruction can lead to your work being cancelled.
Record readings honestly and independently. Do not copy observations, calculations or viva answers from a neighbour, and do not alter the readings a teacher has already checked and signed in your record book. Unfair means of any kind, including copying inside the laboratory, is dealt with under the board's malpractice rules.
Breaks, water and washroom visits are only with the invigilator's permission, and normally only one candidate leaves the laboratory at a time. Do not leave the bench while a burner is lit or a circuit is connected; switch off, disconnect and ask first.
Marks for the practical usually come from several components - the written practical answer sheet, the experiment performed at the bench, the viva voce, and the internal assessment of your record book and project work. Because the weighting between these components is fixed by the board and can change between sessions, confirm the current split with your school rather than relying on what a senior told you.
Write your roll number, batch and experiment number exactly as instructed on every sheet you hand in, and hand in all sheets, rough work and the record book if it is asked for. Take back nothing but your own belongings - carrying out any answer sheet or observation table is treated as a serious irregularity.
If you feel unwell, faint, cut yourself or spill a chemical, stop and tell the invigilator at once. Medical situations are usually handled leniently, but only if they are reported at the time; ask the centre what provision, if any, exists for a candidate who cannot complete the practical, since the rules for a re-test differ by centre.