Other Problem Types
Along with auto-grading calculations, essays, images, structures, equations, and graph-derived values, Chem21Labs reports can also include multiple choice, multiple select, and fill-in-the-blank questions.
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Multiple Choice Multiple choice questions can include text and/or images as answers, and images may also be part of the question. For text-only items, instructors often use a dropdown instead. Incorrect choices are greyed out to prevent reselection. Which of the following pairs have a van't Hoff i factor of 2? ○ Sodium sulfate and potassium chloride |
Multiple Select The multiple select problem type allows more than one correct answer. Choices can include text and/or images, and incorrect selections are greyed out to prevent reselection. Which of the reactions can be classified as precipitation reactions? Please select 2 correct answers from the following choices.
☐ Pb(NO3)2 + K2CrO4 →
☐ Mg + HCl → ☐ NaHCO3 + HC2H3O2 → ☐ H2O + NH4Cl → ☐ Pb(NO3)2 + Na2SO4 →
☐ H2O2 + KMnO4 → ☐ NaOH + HCl → |
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Text (Fill-in-the-Blank) Fill-in-the-blank questions are used when exact spelling is required (e.g., naming compounds). When an incorrect answer is entered, the system provides detailed feedback by checking the response from both left-to-right and right-to-left. |
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Provide a name for SO3. Sulfur Your answer, Sulfur dioxide, is correct in the places shown: Sulfur ioxide |
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