Chemistry Quizzes, Questions & Answers
Recent Quizzes
Questions: 21 | Attempts: 183 | Last updated: Mar 21, 2023
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Questions: 22 | Attempts: 1664 | Last updated: Mar 22, 2023
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Sample QuestionIn 1928, Sir Alexander Fleming was studying Staphylococcus bacteria growing in culture dishes. He noticed that a mold called Penicillium was also growing in some of the dishes. As shown in the illustration below, Petri dish A represents a dish containing only Staphylococcus bacteria. In dishes containing thePenicillium mold, represented by Petri dish B below, Fleming noticed that a clear area existed around the mold because all the bacteria in this area had died. In the culture dishes without the mold, no clear areas were present. Fleming suggested that the mold was producing a chemical that killed the bacteria. He decided to isolate this substance and test it to see if it would kill bacteria. Fleming grew some Penicillium mold in a nutrient broth. After the mold grew in the broth, he removed all the mold from the broth and added the broth to a culture of bacteria. All the bacteria died.Which of the following statements is a reasonable expression of Fleming's hypothesis?
While studying Chemistry, the chemical compounds and elements are some of the hardest concepts to understand. However, with a lot of exercises, it can be pretty easy. The Chemical quiz below tests on different reactions.
Questions: 10 | Attempts: 349 | Last updated: Mar 17, 2023
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Sample QuestionThe atomic mass of copper is 63.55. Given that there are only two naturally occurring isotopes of copper. and , the naturally abundance of the isotope must be approximately
Questions: 7 | Attempts: 358 | Last updated: Mar 17, 2023
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Sample QuestionWhy is chemistry awesome?
Questions: 30 | Attempts: 362 | Last updated: Mar 21, 2023
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Sample QuestionA.) Which of the following single replacement reactions will result in no reaction?
Get ready for this amazing Chemistry Heat and Temperature Quiz. It takes into consideration the resultant heat and temperatures of different reactions and elements. How good are you with the topic? Take the quiz and find out....
Questions: 10 | Attempts: 4428 | Last updated: Mar 22, 2023
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Sample QuestionHow many joules of heat is required to heat 68.00 grams of aluminum foil from 55.00 °C to 93.00 °C in case aluminum has a specific heat of 0.90 J/g °C?
Questions: 6 | Attempts: 209 | Last updated: Mar 20, 2023
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Sample QuestionDuring an endothermic reaction, heat content in the surroundings decreases because —
This is the review quiz for the Chemistry B CFA 1. Please take and review answers at the end. You may take this quiz unlimited amount of times until a passing score is achieved. You will be given a test grade for this quiz;...
Questions: 24 | Attempts: 640 | Last updated: Mar 20, 2023
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Sample QuestionMolar Mass of glucose (CO2) in grams per mole? (Hint: Use periodic table and add molecular weights of the atoms)
Do you like Chemistry? Do you have a keen interest in this Science subject? The quiz below is just a guide toward a decision to major in Chemistry. If you like the subject, choose the option according to that. Otherwise, pick the...
Questions: 38 | Attempts: 7070 | Last updated: Oct 21, 2022
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Sample QuestionHave you decided on Chemistry as your major?
Do you know composites? Take this composite materials quiz with these uniquely designed questions and answers to help you learn more about composite materials! Composite materials are generally made of more than at least one...
Questions: 10 | Attempts: 7186 | Last updated: Mar 25, 2023
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Sample QuestionA composite is a material system made of ___ or more material components:
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