Domain: Chemistry / apparatus_usage

turn: 1
modality: image
input: Generate a concise chemical laboratory bench scene: A <correct and appropriate laboratory container type> contains a substance. This substance must exhibit the following observable appearance: <color + physical state (solid/liquid/gas) + form (powder/lump/crystal/solution, etc.) + optional luster/transparency>. Do not include the substance name, chemical formula, or element symbols. The background should be a <laboratory environment: bench surface, outlines of basic equipment, avoid clutter and text labels>.
output: evaluation_points: 1. The container generated in the image is correct and is indeed a <glass reagent bottle with a ground glass stopper>.

2. The color and appearance (powder/crystals/lump/solution, etc.) of the target substance match the description in the turn 1 input text: 'dark purple, solid, needle-like or prismatic crystals'.

3. The substance is stored correctly in the container (sealed to prevent decomposition by light and moisture), and the quantity is appropriate.

4. The background is a simple laboratory bench scene.

turn: 2
modality: text
input: Based on the appearance of the substance in the input image, and given that this substance is known to have the following properties: 1) It is a strong oxidizing agent. 2) It decomposes upon heating to release oxygen gas. 3) Its aqueous solution has a characteristic purple color. Which of the following substances is it most likely to be?

Options:
A. Potassium dichromate (K2Cr2O7)
B. Sodium chloride (NaCl)
C. Copper(II) sulfate pentahydrate (CuSO4·5H2O)
D. Potassium permanganate (KMnO4)
E. None of the above
output: answer: D

turn: 3
modality: image
input: We will subsequently refer to the substance you identified earlier as the 'target substance'. When <preparing a standard solution of the target substance by dissolving a precisely weighed mass in deionized water within a volumetric flask>, the laboratory instrument <analytical balance> is used. Please generate an image depicting the correct use of this instrument in this scenario. The background is a simple laboratory bench.
output: evaluation_points: 1. The image correctly depicts the instrument <analytical balance>, and its placement on the bench is stable and level.

2. The operation shown (weighing a solid sample on a weighing boat or paper) aligns with the described reaction/scenario of '<preparing a standard solution by mass>'. The substance being weighed should appear as dark purple crystals.

The substance being weighed should appear as dark purple crystals, consistent with the description of the target substance from turn 1.

4. The background is a simple laboratory bench scene.

turn: 4
modality: text
input: Based on the instrument and operational scene in the input image, determine which of the following statements about this instrument and its usage protocols are correct.

Options:
A. It is used for approximate measurements of mass, typically to the nearest gram.
B. It must be calibrated regularly using standard calibration masses.
C. The sample to be weighed should always be placed directly on the balance pan.
D. It is highly sensitive to air currents and vibrations, so its doors should be closed during measurement.
E. It is suitable for weighing hygroscopic substances without any special precautions.
F. The reading should be taken only after the display has stabilized.
G. None of the above are correct.
output: answer: B, D, F