chemistry : class12 Oxygen isotope distribution : Occurrence of Group 16 elements : p-Block Elements MCQ Questions and Answers
Practice important
Oxygen isotope distribution
MCQ questions and answers.
Page 1
of
1
|
10
MCQ Questions
1. Which isotope of oxygen is the most abundant in nature?
A.
Oxygen-16
B.
Oxygen-17
C.
Oxygen-18
D.
Oxygen-19
Correct Answer:
Oxygen-16
Explanation:
Oxygen-16 is the most abundant naturally occurring isotope of oxygen, making up about 99.76% of natural oxygen.
2. Approximately what percentage of natural oxygen is oxygen-16?
A.
0.04%
B.
0.20%
C.
99.76%
D.
50.00%
Correct Answer:
99.76%
Explanation:
Oxygen-16 constitutes approximately 99.76% of the isotopic composition of naturally occurring oxygen.
3. Which naturally occurring oxygen isotope has the smallest abundance?
A.
Oxygen-16
B.
Oxygen-17
C.
Oxygen-18
D.
Oxygen-20
Correct Answer:
Oxygen-17
Explanation:
Oxygen-17 is the least abundant of the three naturally occurring oxygen isotopes, with an abundance of about 0.04%.
4. What is the approximate natural abundance of oxygen-18?
A.
0.04%
B.
0.20%
C.
1.00%
D.
99.76%
Correct Answer:
0.20%
Explanation:
Oxygen-18 occurs naturally in an abundance of approximately 0.20%.
5. How many naturally occurring isotopes of oxygen are commonly recognized?
A.
One
B.
Two
C.
Three
D.
Four
Correct Answer:
Three
Explanation:
The three commonly recognized naturally occurring isotopes of oxygen are oxygen-16, oxygen-17, and oxygen-18.
6. Which sequence correctly arranges the naturally occurring oxygen isotopes in decreasing order of abundance?
A.
Oxygen-16, oxygen-18, oxygen-17
B.
Oxygen-17, oxygen-16, oxygen-18
C.
Oxygen-18, oxygen-17, oxygen-16
D.
Oxygen-17, oxygen-18, oxygen-16
Correct Answer:
Oxygen-16, oxygen-18, oxygen-17
Explanation:
The natural abundances decrease in the order oxygen-16, approximately 99.76%; oxygen-18, approximately 0.20%; and oxygen-17, approximately 0.04%.
7. Which oxygen isotope has a natural abundance of about 0.04%?
A.
Oxygen-16
B.
Oxygen-17
C.
Oxygen-18
D.
Oxygen-15
Correct Answer:
Oxygen-17
Explanation:
Oxygen-17 has a natural abundance of approximately 0.04%.
8. Which oxygen isotope has a mass number of 18 and occurs naturally in about 0.20% abundance?
A.
Oxygen-16
B.
Oxygen-17
C.
Oxygen-18
D.
Oxygen-19
Correct Answer:
Oxygen-18
Explanation:
Oxygen-18 is the oxygen isotope with mass number 18, and its natural abundance is about 0.20%.
9. The isotopic distribution of natural oxygen is mainly due to the high abundance of which isotope?
A.
Oxygen-15
B.
Oxygen-16
C.
Oxygen-17
D.
Oxygen-18
Correct Answer:
Oxygen-16
Explanation:
Natural oxygen is mainly composed of oxygen-16, which accounts for about 99.76% of its isotopic distribution.
10. Which statement about the isotopes of naturally occurring oxygen is correct?
A.
Oxygen-17 is the most abundant isotope.
B.
Oxygen-18 is more abundant than oxygen-16.
C.
Oxygen-16 is the most abundant isotope.
D.
Oxygen has no naturally occurring isotopes.
Correct Answer:
Oxygen-16 is the most abundant isotope.
Explanation:
Oxygen-16 is the most abundant naturally occurring oxygen isotope, while oxygen-17 and oxygen-18 occur in much smaller amounts.
Short Questions and Answers
Practice short questions and answers related to
Oxygen isotope distribution
.
Short questions are currently unavailable for this page.