| [ |
| { |
| "question_id": "8fd3321094e14983b971b9656e6e03ab", |
| "filename": "c_016.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the person in the picture performing?", |
| "options": [ |
| "Pouring reagent directly from a brown light-protective bottle into a round glass bottle placed in a metal pan", |
| "Using a glass pipette to filter the solution through a conical funnel in a beaker into a container", |
| "Using a stirring rod to stir and heat the solution on a water bath", |
| "Using a rubber-bulb dropper to add a colorless, transparent liquid dropwise into the conical flask on the water bath" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "ba1d4a18f38b49ac8b2ad92c8f91263d", |
| "filename": "c_025.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Looking at the round flask in the picture, how can you tell the liquid is being stirred by a magnetic stirrer?", |
| "options": [ |
| "The solution is uniformly colored but shows no obvious flow or vortex", |
| "The liquid surface in the flask forms a distinct vortex", |
| "The liquid surface in the flask is calm, with no visible rotational movement", |
| "A large number of bubbles are continuously rising from the liquid in the flask" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "85105fd7897b4cc9b9d3aadc82e76977", |
| "filename": "c_036.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the person in the picture performing?", |
| "options": [ |
| "Discharging brown liquid through a separatory funnel into the 25 mL round-bottom flask below", |
| "Using a wash bottle to rinse a test tube to remove residual reagents", |
| "Filtering a solid–liquid mixture through a funnel into a small flask", |
| "Pouring the brown liquid into the ordinary funnel connected to the top of the pear-shaped separatory funnel" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "01eb3876204546799ed5d2cac2b07e0b", |
| "filename": "c_041.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is the person in the picture performing?", |
| "options": [ |
| "Placing the flask on a heating device to heat the reactants", |
| "Shaking the round-bottom flask to mix the solid powder evenly with the liquid reagent", |
| "Using a glass rod to stir the mixture in the flask to promote the reaction", |
| "Slowly adding reagent into the flask dropwise with a blue rubber-bulb dropper" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "eafe6fbc6d0e4f02a4a2497b3d8684c3", |
| "filename": "c_049.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is the person in the picture performing?", |
| "options": [ |
| "Adjusting the position of the Erlenmeyer flask below to receive the outflowing liquid", |
| "Stirring the sample in the small glass vial with a glass rod", |
| "Securing the separatory funnel on the metal ring of the retort stand", |
| "Using a rubber-bulb dropper to take liquid from the brown reagent bottle" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "0d48d1c1b40b4c7e9480a30b6de6b28e", |
| "filename": "c_053.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is the person in the picture performing with the rubber-bulb dropper?", |
| "options": [ |
| "Adding reagent dropwise into the test tube", |
| "Mixing solutions in the Erlenmeyer flask with a dropper", |
| "Transferring the solution with a dropper into a small glass vial for sampling", |
| "Drawing a small amount of solution from the reagent bottle" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "30ad5043ddba44c6ae4e4caa68220ebb", |
| "filename": "c_056.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the liquid in the round-bottom flask being stirred?", |
| "options": [ |
| "Yes, the liquid is being stirred by a magnetic stirrer.", |
| "No, the liquid is stationary with no visible stirring.", |
| "No, only the stir bar is observed resting on the bottom with no stirring.", |
| "Cannot determine from the image whether the liquid is being stirred." |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "fc6cef28276b42a9bb4cf77826e22327", |
| "filename": "c_598.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What type of chemical operation is this apparatus most likely used for?", |
| "options": [ |
| "Distillation separation", |
| "Recrystallization purification", |
| "Column chromatography separation", |
| "Liquid-liquid extraction" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "e17707f6cc244c808e9fd46d6bf88091", |
| "filename": "c_074.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Based on the image, which action is the person most likely to perform next?", |
| "options": [ |
| "Stir the blue solution in a 200 mL Erlenmeyer flask with a glass rod.", |
| "Add yellow liquid to a two-neck flask using a rubber-tipped dropper.", |
| "Close and put away the large brown reagent bottle marked with red tape.", |
| "Use a rubber-tipped dropper to add a clear liquid into a 200 mL Erlenmeyer flask containing a deep-blue solution." |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "eec4faf8d3f342d78fbf86c05330b147", |
| "filename": "c_080.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the beaker shown in the image require additional support or clamps to secure it?", |
| "options": [ |
| "No, it can be placed directly.", |
| "Only a non-slip mat under the base is needed for stability.", |
| "Use a test-tube rack or tray or similar auxiliary holder to secure it.", |
| "Requires using a stand or clamp to secure it to prevent tipping." |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "2f01d6335fe3444185e53d259f2fd373", |
| "filename": "c_082.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the person in the image most likely performing?", |
| "options": [ |
| "Observing or recording a color change of the liquid in the flask.", |
| "Securing the round-bottom flask to a retort stand.", |
| "Adding or removing reagents from the round-bottom flask.", |
| "Connecting the round-bottom flask to a reflux or condenser apparatus." |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "ceb1fac795004398906bfb16112e1b57", |
| "filename": "c_085.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the person in the picture most likely performing?", |
| "options": [ |
| "Assembling apparatus on a ring stand and heating the reaction system", |
| "Performing an acid–base titration in an Erlenmeyer flask to determine solution concentration", |
| "Shaking an Erlenmeyer flask containing a dark brown liquid with the right hand to mix it", |
| "Using a separatory funnel to allow liquid–liquid phase separation and isolate the yellow liquid" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "4304d797acb0432bb9ecad7af24ba82a", |
| "filename": "c_086.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the person in the picture more likely performing with a glass rod inside the funnel?", |
| "options": [ |
| "Stirring inside the funnel with a glass rod to mix the liquids", |
| "Scraping solid residue inside the funnel with a glass rod", |
| "Using a glass rod to clear the funnel opening to prevent clogging", |
| "Using a glass rod inside the funnel to assist liquid flow" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "5b9f9acab0ec47b3a1ca49d426931620", |
| "filename": "c_089.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which liquid-addition operation is the person performing with the round-bottom flask in the image?", |
| "options": [ |
| "Using a Pasteur pipette to add a small amount of reagent to the round-bottom flask", |
| "Using a pipette to accurately measure and transfer liquid into the round-bottom flask", |
| "Using a burette to perform titration with a standard solution", |
| "Using a wash bottle to add solvent or rinse into the round-bottom flask" |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "e0111090aaec4ea6b25cbf0f5a09d0f0", |
| "filename": "c_090.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the person in the picture performing?", |
| "options": [ |
| "Heating the round-bottom flask and carrying out reflux", |
| "Using a Pasteur pipette to add liquid to the round-bottom flask", |
| "Using a pipette to withdraw liquid from the round-bottom flask", |
| "Using a burette to titrate the solution in the flask" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "00130b77f91648a58effb0f712525f18", |
| "filename": "c_095.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which of the following operations is the person in the picture more likely performing?", |
| "options": [ |
| "Shaking a separatory funnel to mix two liquid phases", |
| "Removing the separatory funnel from the ring stand for transfer or weighing", |
| "Adding reagents to a separatory funnel fixed on the ring stand", |
| "Releasing the lower yellow phase from the separatory funnel" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "24cd909e773142dc9f434a8aff005d81", |
| "filename": "c_096.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is the round-bottom flask undergoing in the picture?", |
| "options": [ |
| "Cooling", |
| "Shaking", |
| "Standing", |
| "Heating" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "162eb1c0efc4423192d98e49f62219fb", |
| "filename": "c_100.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the experimenter performing in the picture?", |
| "options": [ |
| "Pouring a clear liquid into an Erlenmeyer flask using a graduated cylinder", |
| "Using a graduated cylinder to remove a turbid liquid from a round-bottom flask", |
| "Slowly adding reagent into an Erlenmeyer flask using a burette", |
| "Washing and drying the graduated cylinder inside the fume hood" |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "7f45f1b64f1f4b87b09f057f31038d40", |
| "filename": "c_101.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the experimenter performing in the picture?", |
| "options": [ |
| "Using a spatula to transfer a solid sample from an Erlenmeyer flask to a weighing boat", |
| "Using a spatula to transfer a solid sample from a weighing boat to an Erlenmeyer flask", |
| "Adding a liquid sample into an Erlenmeyer flask with a dropper", |
| "Using a graduated cylinder to measure liquid from an Erlenmeyer flask" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "f52c8a44f6e74574b5b473f1acce4035", |
| "filename": "c_106.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which of the following operations is the experimenter performing in the picture?", |
| "options": [ |
| "Using a graduated cylinder to remove liquid from an Erlenmeyer flask", |
| "Adding the liquid from the separatory funnel dropwise into the Erlenmeyer flask below", |
| "Pouring liquid into a separatory funnel", |
| "Adding reagent into a funnel for filtration" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "bd2362a2349443159e81a04293cf50e8", |
| "filename": "c_563.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the 50 mL pear-shaped reaction flask on the right still require additional securing?", |
| "options": [ |
| "Yes, additional clamps on the body should be added to improve stability", |
| "No, the existing metal clamp and support stand already securely suspend the flask", |
| "Yes, replace it with a larger metal clamp to fully tighten around the neck", |
| "No, using only the yellow plastic joint clip is sufficient to secure it" |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "18f611ddf6ad456ead822d12753af3e3", |
| "filename": "c_501.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which type of experimental operation is this setup most likely used for?", |
| "options": [ |
| "Gas collection or scrubbing", |
| "Vacuum filtration", |
| "Gravity filtration (at atmospheric pressure)", |
| "Recrystallization to prepare crystals" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "578f6e24dcae4a4e82e30d1ee3175e07", |
| "filename": "c_558.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the Erlenmeyer flask receiving liquid in the picture need additional securing?", |
| "options": [ |
| "Only when the flow is rapid or there is a vigorous reaction does the Erlenmeyer flask need to be secured.", |
| "It should be clamped to a stand with a clamp to prevent tipping.", |
| "No additional securing is needed; the Erlenmeyer flask can be placed directly at the receiving position.", |
| "It should be secured to the funnel neck with a rubber stopper or tubing to prevent leaks." |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "35956826050846dfa040168bfb1d475c", |
| "filename": "c_557.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is the reaction flask containing a deep purple/near-black liquid undergoing in the picture?", |
| "options": [ |
| "Under magnetic stirring", |
| "Being heated", |
| "Connected to vacuum or an inert gas supply", |
| "Standing (not stirred)" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "110a448636a94efdb03ae780ac3e6f2e", |
| "filename": "c_549.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the pear-shaped reaction flask on the left in the picture still require additional securing?", |
| "options": [ |
| "Yes; a support or clamp should be used to secure the neck or body to prevent tipping.", |
| "No; the yellow plastic joint clip and pink tape already sufficiently secure it.", |
| "No; simply wrap the stopper with more tape.", |
| "Yes, but replacing it with a tighter metal spring clamp at the neck is sufficient." |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "5ee4122cfa084636b90b752aa95e5ac8", |
| "filename": "c_177.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which experimental operation is the apparatus shown most likely used for?", |
| "options": [ |
| "Distillation (heating and collecting volatile components)", |
| "Liquid–liquid separation (using a separatory funnel to transfer layers)", |
| "Filtration (separating a solid–liquid mixture through filter paper)", |
| "Titration (quantitatively adding reagent from a burette to the endpoint)" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "273c1215dae546a0a6b1b39e187ac274", |
| "filename": "c_539.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the round-bottom flask in the picture require additional clamping or securing?", |
| "options": [ |
| "Only the condenser needs to be secured; the flask body does not need to be clamped.", |
| "Use a flat-bottomed vessel instead, so the flask won't require clamping.", |
| "Yes; clamp the flask neck and secure it to a stand.", |
| "No; it is safe to use placed on a tripod with a heat-resistant pad." |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "f6c5107ab5ca4c4eabe5bd565d926403", |
| "filename": "c_524.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What type of chemical operation is the entire setup shown most likely used for?", |
| "options": [ |
| "Reflux heating for an organic synthesis reaction", |
| "Vacuum filtration to separate solids from the filtrate", |
| "Liquid–liquid extraction for solute partitioning and separation", |
| "Column chromatography to separate components of a mixture" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "761e31b34d3a4b7c988038d3590f5308", |
| "filename": "c_532.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the two-neck round-bottom flask shown require additional clamping or securing?", |
| "options": [ |
| "Yes; it can be temporarily secured with tape or cord.", |
| "No; the flask is already secured to the stand by the blue plastic connector.", |
| "Yes; the neck should be further secured with a clamp.", |
| "Yes; the bottom should be supported with a tripod or support." |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "1a06e3fcd6714e68b1d739cb27b3ef8f", |
| "filename": "c_511.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the three-neck round-bottom flask in the figure require additional clamping or securing?", |
| "options": [ |
| "Use a three-prong clamp to hold the bottom and secure it to the stand.", |
| "Tie the flask to the stand with cable ties or rope to prevent movement.", |
| "No extra clamping is needed; placing it on a magnetic stirrer/hotplate with a cork heating ring provides stability.", |
| "Clamp one neck with a utility clamp to prevent tipping." |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "7300bbbeb79f4e48886682135a5d002b", |
| "filename": "c_497.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Do these test tubes shown require additional clamping or securing to ensure safety?", |
| "options": [ |
| "Additional clamps should be attached to all three test tubes.", |
| "Only the test tube containing the pale yellow liquid needs reinforcement; the others do not.", |
| "No; the existing test tube rack can stably hold all the test tubes.", |
| "Only the two test tubes containing black precipitate require additional clamping." |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "54792c58ee64451b85d22df9ffff2d42", |
| "filename": "c_496.jpg", |
| "question_type": "Experimental Operations", |
| "question": "According to the figure, do the test tubes require additional clamping or securing devices?", |
| "options": [ |
| "Yes; test tubes containing solids or precipitate should be additionally clamped to prevent tipping or spillage.", |
| "No; all test tubes are in a rack and are stable enough without extra fastening.", |
| "Additional clamping is only required during heating or shaking operations; it is unnecessary when stationary.", |
| "Only individual test tubes with visible precipitate or solids need to be secured; the others can remain in the rack." |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "67549e8600664b919001317b6de46d58", |
| "filename": "c_484.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the graduated cylinder shown require additional fixtures for securing?", |
| "options": [ |
| "It should be secured with a clamp or a three-prong clamp.", |
| "No; the graduated cylinder is already placed on a stable support.", |
| "Only during special operations such as heating or shaking does it need additional securing.", |
| "Only needs temporary securing when pouring or transferring liquids." |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "fcf2cc912f964a9896a4799a924fbea8", |
| "filename": "c_483.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the conical flask on the left in the figure require additional clamping or securing?", |
| "options": [ |
| "Yes; secure the neck with a rubber stopper or sealing cap.", |
| "Yes; fasten the flask to the stand with a metal clamp and support rod.", |
| "No; the conical flask on the left can be placed directly for use.", |
| "Yes; reinforce it against tipping with a clamping holder or universal clamp." |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "45e1b593a3204cbd9b7a3629d6aac1c7", |
| "filename": "c_477.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Do the two two-neck round-bottom flasks placed on cork rings in the figure require additional clamping or securing?", |
| "options": [ |
| "No; resting on cork rings is sufficiently stable.", |
| "Only necessary during prolonged heating or when connected to tubing; for short procedures it need not be secured.", |
| "Use a sealing sleeve or tape to secure the flask neck rather than clamping the body.", |
| "Yes; clamp them to a stand to prevent tipping and slipping during heating." |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "00786803116a4473bd65347137dabb11", |
| "filename": "c_476.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the frontmost round-bottom flask (on the white magnetic stirrer) require additional clamping or securing?", |
| "options": [ |
| "Yes; it should be further secured with a clamp or support stand.", |
| "Yes; but placing a non-slip pad under the base is sufficient to prevent tipping.", |
| "No; placing it on the magnetic stirrer provides sufficient stability.", |
| "No; because all the flasks in the figure are already secured to stands." |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "e06e32ad823d4115ad58bd68cf4a6e1c", |
| "filename": "c_470.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Do the test tubes in the figure require additional devices for clamping or securing?", |
| "options": [ |
| "Yes; but they can be hand-held or temporarily supported instead of using permanent clamps.", |
| "Yes; use a test-tube clamp to secure the tubes to the stand.", |
| "No; they can be placed upright directly on the bench or a tray.", |
| "No; placing them in a test-tube rack is sufficient—no clamps required." |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "97e2a991c7ce46718a41b1a059f89c77", |
| "filename": "c_446.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the glass funnel on the left in the figure secured to the stand by an additional device (such as a clamp)?", |
| "options": [ |
| "No; the funnel is simply placed on the bench or a vessel and not clamped.", |
| "Yes; but it is secured by simple means such as a rubber ring or stopper rather than a metal clamp.", |
| "No; the funnel is inserted into or rests on the column and is supported by it.", |
| "Yes; secured to the stand with a clamp." |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "c7bff2b86ab1409eaa1ea0bfbe55997d", |
| "filename": "c_386.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the pear-shaped flask in the picture clamped or otherwise secured by an additional device?", |
| "options": [ |
| "No — no clamping or securing; placed directly.", |
| "No — held by hand or temporary support; no fixed device used.", |
| "Yes — clamped to a ring stand and fixed on the hot plate.", |
| "Yes — only supported by a black flask cradle, not clamped." |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "a5cdd8fade054726abd533ad02d8a18e", |
| "filename": "c_347.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the pear-shaped separatory funnel in the image secured by an additional device? If so, which method best matches what is shown?", |
| "options": [ |
| "Fixed using a magnetic base.", |
| "Clamped to the stand with a clamp on a ring stand.", |
| "Not externally secured; only placed on the bench.", |
| "Temporarily tied and secured with rope or rubber bands." |
| ], |
| "answer": "B" |
| } |
| ] |
|
|
