1681Every Day ScienceMedium
Which one of the following is true?
AThe moon has magnetic field but no atmosphere
MCQs
Read every question, see the correct answer, and understand the explanation at your own pace. Study mode has no timer and no negative marking.
Correct answer
B. The moon has no atmosphere or magnetic field
Explanation
The moon has no atmosphere or magnetic field is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
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D. Insulin
Explanation
Insulin is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
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B. Ethanol
Explanation
Ethanol is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
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A. Japan being the Eastern most country in the world, it has the earliest sunrise
Explanation
Japan being the Eastern most country in the world, it has the earliest sunrise is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
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B. Heart
Explanation
The heart is the first organ to form during development of the body. When an embryo is made up of only a very few cells, each cell can get the nutrients it needs directly from its surroundings.
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D. Nicotine
Explanation
Nicotine is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
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B. 3
Explanation
Octopuses have three hearts; a systemic heart that circulates blood round the body and two branchial hearts that pump it through each of the two gills.
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C. Fermi
Explanation
Fermi is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
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C. 8.23%
Explanation
8.23% is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. 4
Explanation
The valency of carbon is 4. As the atomic number of carbon is 6, it has a total of 6 electrons in one atom arranged in the following configuration. it needs to add 4 more electrons to the 2p sub-shell, or lose 4 electrons from the 2s and 2p sub-shells.