Download www.ck12.org Significant Figures Practice True False Questions

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Significant Figures Practice
True False Questions
Indicate True or False for the following Statements.
1.
2.
3.
4.
There is always a degree of uncertainty involved with every measurement. ( True/False )
Multiplication of 36,000 and 52.00 give the significant value 1872.000. ( True/False )
There are four significant numbers in 70.03. ( True/False )
While adding or subtracting a quantity, the answer contain no more decimal places than the least accurate
measurement. ( True/False )
5. The significant figures in a number include all of the certain digits plus one doubtful digit. ( True/False )
6. In the following expression 0.01208
0.0236 , the answer should be reported up to four decimal places. ( True/False )
7. It is desirable for the sides of a graduated cylinder to be perfectly vertical. ( True/False )
Multiple Choice Questions
For each question, four alternative choices are given, of which only one is correct. You have to select the correct
alternative and mark it in the appropriate option.
8. Calculate the following using proper number of significant figures: 20.0345 × 0.03120/4.0 × .333.
a.
b.
c.
d.
0.47
0.40
0.469
0.4692
9. A sample of nickel weighs 7.5425 g and has a density of 8.8 g/cm3 . What is the volume with the correct
number of significant figures?
a.
1.33 cm3
b.
9.2 cm3
c.
0.86 cm3
d.
None o f the above
10. A pan balance can only measure to _____.
a.
b.
±0.1 g
±0.01 g
c.
±0.001 g
d. None of the above
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11. When applying the idea of significant digits to measurements, one must differentiate between which of the
following?
a.
b.
c.
d.
Analog and digital measuring devices
Mass and volume measuring devices
Temperature and pressure measuring devices
None of the above
12. The mass of copper is 0.063546 kg and the density is 8.940 g/cm3 . Calculate the volume using scientific
figures.
a.
7.108 cm3
b.
7.10 cm3
c.
7.1080 cm3
d.
7.1 cm3
13. Which of the following statements are correct for a burette?
a.
b.
c.
d.
The burette is designed to accurately deliver a volume of liquid
The burette is used for measuring the volume of liquid used from the burette
The burette volume can be measured to the hundredths place
All of the above
14. When expressed as 7.5 × 104 , only the significant figures of _____ are to be considered.
a.
b.
c.
d.
7.5
7.05
7.005
None of the above
15. The mass of an element is .007502 × 10−26 g. Find the number of significant figures when the mass is
converted to mg. (Both mass values have same order of magnitude)
a.
b.
c.
d.
4
5
3
2
16. A cube like crystal structure has length 6.000 cm, width 6.00 cm and height 0.0600 m. Calculate its volume
with correct significant figures.
a.
b.
c.
d.
216 cubic cm
21.600 cubic cm
18.00 cm
None of the above
17. What is the sum of 22.82 + 2.2457 with the correct number of significant figures.
a.
b.
c.
d.
2
25.065
25.09
25.06
25.0651
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18. The weights of sodium chloride salt in three petri dishes are 99.99 g, 100.13 g, and 100.23 g respectively.
Which of the following is the average mass of salt?
a.
b.
c.
d.
100.1166 g
100.116 g
100.11 g
100.1 g
19. Which of the following expresses the one millionth of one in 3 significant places?
a.
0.01 × 10−6
b.
0.10 × 106
c.
0.001 × 10−6
d.
1.00 × 10−6
20. Calculate the number of significant figures up to which
a.
b.
c.
d.
2.36×0.07251
2.103
will be expressed.
2
3
4
5
Answer Keys
1.
2.
3.
4.
5.
6.
7.
8.
TRUE
FALSE
TRUE
TRUE
TRUE
FALSE
TRUE
(a)
0.47
9. (c)
0.86 cm3
10. (a)
±0.1 g
11. (a) Analog and digital measuring devices
12. (a)
13.
14.
15.
16.
17.
7.108 cm3
(d) All of the above
(a) 7.5
(a) 4
(a) 216 cubic cm
(c) 25.06
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18. (c) 100.11 g
19. (d)
1.00 × 10−6
20. (b) 3
4
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Printed: October 11, 2013
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