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. Bus Rapid Transit
Explanation
Bus Rapid Transit is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Vitamins
Explanation
Vitamins is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
A. aluminium
Explanation
aluminium is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Cosmic rays
Explanation
Cosmic rays is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Regulate body temperature
Explanation
Regulate body temperature is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. 10 -9 meter
Explanation
10 -9 meter is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. Graphite
Explanation
Graphite is best suited for lubrication in air. It is a mineral made of loosely bonded sheets of carbon atoms, giving it a slippery texture that makes it a very effective lubricant.
Correct answer
B. 2019 LD2
Explanation
2019 LD2 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. Mineral
Explanation
Mineral is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. 73%
Explanation
According to H.H. Mitchell, Journal of Biological Chemistry 158, the brain and heart are composed of 73% water, and the lungs are about 83% water. The skin contains 64% water, muscles and kidneys are 79%, and even the bones are watery: 31%.