الرئيسية » الكيمياء العامة المبسطة » أسئلة اختيار من متعدد باللغة الإنجليزية للوحدة الأولى Introduction: Matter and Measurement من كتاب CHEMISTRY THE CENTRAL SCIENCE

# أسئلة اختيار من متعدد باللغة الإنجليزية للوحدة الأولى Introduction: Matter and Measurement من كتاب CHEMISTRY THE CENTRAL SCIENCE

أسئلة اختيار من متعدد باللغة الإنجليزية للوحدة الأولى Introduction: Matter and Measurement من كتاب CHEMISTRY THE CENTRAL SCIENCE

هذه الأسئلة أيضا تغطي :

(باللون الأحمر هي الإجابة الصحيحة)

1. The SI unit for mass is
a) kilogram
b) gram
c) pound
d) troy ounce
e) none of these

2. Which one of the following is the smallest mass?
a) 25 kg
b) 2.5 x 10-2 Mg
c) 2.5 x 1015 pg
d) 2.5 x 109 fg
e) 2.5 x 1010 ng

3. Which one of the following is the highest temperature?
a) 38 °C
b) 96 °F
c) 302 K
d) none of the above

4. On which temperature scale is one degree the smallest?
a) Kelvin
b) Centigrade
c) Fahrenheit

5. Which one of the following is true about the liter?
a) it is the SI base unit for volume
b) it is equivalent to a cubic decimeter
c) it is slightly smaller than a quart
d) it contains 106 cubic centimeters

6. Which one of the following objects is the most dense?
a) an object with a volume of 2.5 L and a mass of 12.5 kg
b) an object with a volume of 139 mL and a mass of 93 g
c) an object with a volume of 0.00212 m3 and a mass of 4.22 x 104 mg
d) an object with a volume of 3.91 x 10-24 nm3 and a mass of 7.93 x 10-14 ng
e) an object with a volume of 13 dm3 and a mass of 1.29 x 103 μg

7. Express the temperature, 422.35 K, in degrees centigrade and in degrees Fahrenheit.
a) 792.23 °C, 519.08 °F
b) 149.20 °C, 300.56 °F
c) 695.50 °C, 354.39 °F
d) 50.89 °C, 324.04 °F
e) 22.78 °C, 98.60 °F

8. A common English set of units for expressing velocity is miles/hour. What is the set of basic SI units for velocity?
a) km/hr
b) km/s
c) m/hr
d) m/s

9. What fraction of a meter is a nanometer?
a) 10-2
b) 10-12
c) 10-6
d) 10-3
e) 10-9

10. Convert 400 K to °F.
a) 261
b) 286
c) 88
d) 103

11. A laboratory analyzed a standard known to contain 135 ppm lead. The following results were obtained. Which one of the following is true concerning this data set?
Trial       ppm Lead
1              169
2              114
3              142
4              115

a) the data set is both precise and accurate
b) the data set is neither precise nor accurate
c) the data set is accurate but not precise
d) the data set is precise but not accurate

12. In which one of the following numbers are all of the zeros significant?
a) 100.090090
b) 143.29
c) 0.05843
d) 0.1000
e) 00.0030020

13. Round the number 0.007225 to three significant figures.
a) 0.007
b) 0.00722
c) 0.0072
d) 0.00723

14. In which one of the following is the number correctly rounded to 3 significant figures?
a) 3.2550 ⇒ 3.25
b) 0.01832 ⇒ 0.018
c) 100 ⇒ 100
d) 1.325 ⇒1.33

15. How many significant figures should there be in the answer to the following problem? (10.07 + 7.395)/2.5
a) 1
b) 2
c) 3
d) 4

16. A flow reactor has an output of 8709 L/min. What is the output of this reactor in gallons per
hour?
a) 1.380 x 105 gal/hr
b) 5.524 x 105 gal/hr
c) 9206 gal/hr
d) 2302 gal/hr

17. 20.0 cubic yards is how many cubic meters?
a) 6.02 m3
b) 2.37 m3
c) 15.3 m3
d) 0.425 m3
e) 98.6 m3

18. Which of the following is the same as 0.001 cm?
a) 0.01 mm
b) 0.01 dm
c) 0.01 m
d) 100 mm

19. There are ___________ ng in a pg.
a) 0.001
b) 1000
c) 0.01
d) 100

20. An acceleration of 320 ft/min‚ is _______ m/s‚.
a) 3.51 X 107
b) 5.85 X 105
c) 1.63
d) 0.0271

21. Zinc has a density of 446 lb/ft3. What is the density of zinc in g/cm3?
a) 7.14 g/cm3
b) 0.0323 g/cm3
c) 6.64 X 103 g/cm3
d) 3.65 g/cm3

22. The density of magnesium is 1.74 g/cm3. What is the mass of a magnesium block that measures 2.5 cm X 3.5 cm X 1.5 cm?
a) 48 g
b) 23 g
c) 12 g
d) 7.5 g

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### عن Akram Amir El Ali استاذ الكيمياء التحليلية ومصمم غرافيك

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