1321ChemistryMedium
If speed of gas molecules increases by twice on heating. What will be their kinetic energy?
A
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Correct answer
A. increases by four times
Explanation
The kinetic energy of gas molecules is proportional to the square of their speed. If the speed of the gas molecules increases by a factor of two, the kinetic energy will increase by the square of two. Thus, the kinetic energy will increase by four times.
Correct answer
B. by replacing external circuit with external source of electricity
Explanation
by replacing external circuit with external source of electricity is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. nitration
Explanation
nitration is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. 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%.
Correct answer
D. 1s2 2s2 2p6 3s2 3p1
Explanation
1s2 2s2 2p6 3s2 3p1 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
Explanation
10 is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. HCHO
Explanation
HCHO is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
C. None of the above
Explanation
None of the above is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
D. Phthalic acid
Explanation
Phthalic acid is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.
Correct answer
B. primary alkyl halide
Explanation
primary alkyl halide is the correct answer. Review the question and compare it with the other choices to remember this fact for future exams.