| [ |
| { |
| "question_id": "c02a04fa295b46ccb3f6dbdcb0323db7", |
| "filename": "s_101.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is being carried out in the round-bottom flask shown?", |
| "options": [ |
| "Cooling", |
| "Heating", |
| "Magnetic stirring", |
| "At rest" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "852285120bd242edb24429e48a50c878", |
| "filename": "s_109.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the glass beaker (containing a yellow liquid) shown require additional support or clamping?", |
| "options": [ |
| "Yes—secure it with a clamp or support to prevent tipping or spillage.", |
| "Place it in a tray with raised edges to contain any leaks.", |
| "It needs to be clamped on a retort stand and used with heating/stirring equipment.", |
| "No additional support is needed; it can be used directly on the bench." |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "d9b012f3ae0d456cace839538b140559", |
| "filename": "s_084.jpg", |
| "question_type": "Experimental Operations", |
| "question": "In the top-view image, the glass funnel contains an orange-red mixed phase. Which chemical operation is most likely taking place?", |
| "options": [ |
| "Let stand (waiting for precipitation or phase separation)", |
| "Dissolving (solid dissolving in a solvent)", |
| "Liquid–liquid separation (phase separation)", |
| "Liquid–liquid extraction (extracting a solute with a solvent)" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "a755bfe645db452fbc781f5306517f47", |
| "filename": "s_090.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Based on the apparatus shown, which experimental operation is it best suited for?", |
| "options": [ |
| "Liquid–liquid separation", |
| "Filtration", |
| "Extraction", |
| "Distillation" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "3e4a79a9499b433096d02e16e217058a", |
| "filename": "s_128.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Which operation is the three-neck round-bottom flask in the figure most likely performing?", |
| "options": [ |
| "Stirring the solution", |
| "Heating the solution", |
| "Cooling the solution (low-temperature conditions)", |
| "Purging the flask with an inert gas" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "2325b8e78de340d1917ca64da9185326", |
| "filename": "s_129.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Based on the operating situation of the chromatography column shown, the most reasonable next experimental step is:", |
| "options": [ |
| "Close the stopcock, stop the outflow, and wait for the column to fully stabilize before proceeding", |
| "Continue to add elution solvent to the column dropwise but do not collect the effluent yet", |
| "Replace the receiving vessel below with a new test tube before starting to collect the effluent", |
| "Open the column stopcock to allow the eluted liquid to continue flowing into the test tube below" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "754562b63ca34be6b7aefeb10cfbbc76", |
| "filename": "s_137.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What experimental operation is being performed with the apparatus and the tilted single-neck round-bottom flask shown?", |
| "options": [ |
| "Simple distillation/fractional distillation", |
| "Rotary evaporation (concentrating solvent)", |
| "Reflux (condensing) reaction", |
| "Vacuum drying of a solid" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "bde8db710f4b45478e47a5aac0768e2f", |
| "filename": "s_082.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the round-bottom flask in the picture secured by any device other than the green plastic clamp?", |
| "options": [ |
| "Only held by the green plastic clamp, not connected to other supports", |
| "Connected and fixed via a ground glass joint to the upper tubing/apparatus", |
| "Secured to the heating unit by an external support clamp", |
| "Not clamped; placed directly in the heating bath and supported by its own weight" |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "50e97531604f4cb69b2a109d2825b0bd", |
| "filename": "s_010.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the Erlenmeyer flask in the image secured by any other device?", |
| "options": [ |
| "Secured to the benchtop with tape or rope.", |
| "Placed directly on the benchtop; no securing devices are visible.", |
| "Secured on a hotplate or other heating device.", |
| "Fixed to a stand using laboratory supports and clamps." |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "6ec576ceb4dc4431b9da7908daa6533b", |
| "filename": "s_261.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is the yellow solution in the Erlenmeyer flask undergoing in the image?", |
| "options": [ |
| "At rest", |
| "Cooling", |
| "Stirring", |
| "Heating" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "937f9be3dcc44bd185d7ecc62a1e1af5", |
| "filename": "s_213.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the test tube at the upper right secured by a device?", |
| "options": [ |
| "Yes, the test tube is secured in the upper-right test tube rack", |
| "No, the test tube is suspended on a holder and does not contact the rack", |
| "No, the test tube is lying on the benchtop without any securing device", |
| "No, the test tube is clamped to the ring stand" |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "dc86fddf18ed4190a86203a4595344ff", |
| "filename": "s_269.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the round-bottom flask in the picture fixed by an additional device?", |
| "options": [ |
| "Connected and secured to other apparatus using a rubber stopper or tubing", |
| "Clamped to the support with a clamp", |
| "Placed directly on the workbench without additional securing", |
| "Suspended and secured in the air with fine string or wire" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "d3f40429c5b2447f94a3224f29e13911", |
| "filename": "s_191.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Based on the figure, which of the following is the most reasonable assessment about whether the graduated cylinder needs additional securing?", |
| "options": [ |
| "Yes — secure the graduated cylinder clamp to the retort stand to ensure it cannot fall", |
| "Yes — tape the base of the graduated cylinder to the lab bench to prevent slipping", |
| "Yes — place the graduated cylinder in a tray or container to contain any spills", |
| "No — the lower part of the graduated cylinder is already held by a plastic clamp and is secure" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "db79577ec9dd4c0b8aa08cdf970cfbea", |
| "filename": "s_189.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the round-bottom flask shown require additional securing in its current state?", |
| "options": [ |
| "No additional securing is needed; it can be placed directly on a flat surface and remain stable", |
| "Only fit a rubber ring around the neck so it contacts the support for simple securing", |
| "It should be placed in a heating mantle or a round-bottom flask clamp for securing", |
| "It needs to be secured with a clamp and stand to prevent tipping and breakage" |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "0db6b47fd1b44cc19e18cd0f9f016e5c", |
| "filename": "s_184.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the beaker containing about 500 mL of pale green solution shown require additional securing?", |
| "options": [ |
| "It should be covered and secured with a clamp to prevent evaporation or contamination", |
| "No additional securing is required; it can be placed directly on the lab bench", |
| "It should be clamped to prevent tipping or spillage", |
| "It should be placed on a tripod and secured with a clamp" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "35266f5d12b345739cf036e06e2ce929", |
| "filename": "s_181.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Is the round-bottom flask shown secured with any additional apparatus?", |
| "options": [ |
| "No — the flask is simply placed on the magnetic stirrer and is not secured", |
| "Yes — the flask is held by a clamp attached to the magnetic stirrer", |
| "No — the flask is held stable by friction with the stirrer", |
| "Yes — the flask is secured by the blue clamp on the retort stand" |
| ], |
| "answer": "D" |
| }, |
| { |
| "question_id": "ff5428b478694bc489f389e1e9c58de2", |
| "filename": "s_178.jpg", |
| "question_type": "Experimental Operations", |
| "question": "What operation is being performed on the liquid in the beaker?", |
| "options": [ |
| "Stirring the solution", |
| "Heating the solution", |
| "Cooling the solution", |
| "Filtering the solution" |
| ], |
| "answer": "A" |
| }, |
| { |
| "question_id": "d1cadf31ecc44f47add41fb04a0409e8", |
| "filename": "s_167.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Are the three round-bottom flasks in the picture secured by external devices (such as clamps or stands)?", |
| "options": [ |
| "Yes, all three flasks are secured to a support structure with external clamps or stands", |
| "Yes, but they are only sealed with white rubber flanged stoppers; no external clamps or stands are visible", |
| "No, the flasks are only placed on the bench without any securing or sealing devices", |
| "Cannot determine; the image does not clearly show whether any securing devices are present" |
| ], |
| "answer": "B" |
| }, |
| { |
| "question_id": "a5ff02e6a75f4d1694a05e2cf229bcd2", |
| "filename": "s_165.jpg", |
| "question_type": "Experimental Operations", |
| "question": "When the round-bottom flasks shown are heated in a heating mantle, do they require additional securing devices?", |
| "options": [ |
| "Yes, but you should switch to flat-bottom flasks and heat them on a hot plate to avoid using clamps", |
| "No, not necessary; reducing the heating intensity will avoid danger", |
| "Yes, additional support clamps or stands should be added at the lower body or midsection of the flask to prevent dislodgement", |
| "No, not necessary; the gray three-prong clamp on the lab stand is sufficient to secure the flasks" |
| ], |
| "answer": "C" |
| }, |
| { |
| "question_id": "ef22a3f8c38f4331ba987c6a08fb7fa3", |
| "filename": "s_159.jpg", |
| "question_type": "Experimental Operations", |
| "question": "Does the Erlenmeyer flask in the picture require additional securing devices in this experimental state?", |
| "options": [ |
| "Yes, secure it with a clamp or lab stand to prevent tipping", |
| "Yes, seal and secure it with a rubber stopper or other sealing device", |
| "Yes, place it on a magnetic stirrer or heating device and secure it", |
| "No, no additional securing is necessary; it can be placed directly on the workbench" |
| ], |
| "answer": "D" |
| } |
| ] |
|
|
