ضروري

[كثرين]

السلام عليكم ورحمة الله وبركاته اش اخباركم كيف الا ستعداد للاختبارات الله يعينا بدي مساعدة في الكيمياء التحولات اللي في شبتر 1 ودسي والمتر ما اعرف مي الاصغر والاكبر مي مفهمومة ماني قادرة تدخل طفشت بدي شاطرتكم وانشاء الكل يستفيد بس ابغى الحل صح والشرح

Questions on
Chapter 1
(Choose and mark the correct answer)
1- Which of the following is not an SI base unit?
a- kilometer b- kilogram c- second d- Kelvin
2- Which of the following SI base units is not commonly used in chemistry?
a- mole b- kilogram c- candela d- Kelvin
3- Which of the following is a SI base unit?
a- kilometer b- gram c- second d- Celsius
4- The unit of force Newton (N) is:

a- m s

-2 b- kg m2 s-2 c- m s-1 d- kg m s-2

5- The unit of energy Joule (J) is:
a- m s

-2 b- kg m2 s-2 c- m s-1 d- kg m s-2

6- What is 22.6 m when converted to decimeters?
a- 0.226 dm b- 2.26 dm c- 226 dm d- 2.26 x 10

–3 dm

7- What is 25.4 mg when converted to kilograms?
a- 2540 kg b- 2.54 x10

–5 kg c- 2.54 kg d- 2.54 x 104 kg

8- Which of the following prefixes means 1/1000?
a- kilo b- deci c- centi d- milli
9- The SI prefixes milli and mega represent, respectively:

a- 106 and 10-6. b- 10-3 and 106. c- 103 and 10-6. d- 10-3 and 109



سوري والله ماني عارفة كيف انزله سامحوني

[كثرين]

10-The diameter of an atom is approximately 1 ´ 10-8 cm. What is this diameter when
expressed in nanometers?
a- 1 ´ 10-19 nm b- 1 ´ 10-15 nm c- 1 ´ 10-1 nm d- 1 ´ 10-10 nm
11-6.0 km is how many micrometers?
a- 6.0 ´ 106 μm b- 1.7 ´ 10-7 μm c- 6.0 ´ 109 μm d- 6.0 ´ 103 μm
12-2.4 km is how many millimeters?
a- 2,400 mm b- 2.4 ´ 104 mm c- 2.4 ´ 105 mm d- 2.4 ´ 106 mm
13-How many milliliters is 0.005 L?
a- 0.5 mL b- 5 mL c- 50 mL d- 0.000005 mL
14-Express 7,500 nm as picometers
a- 7.50 pm b- 75.0 pm c- 7.5 ´ 106 pm d- 7.5 ´ 1012 pm
15-Express 7500 nm as micrometer
a- 7.50 μm b- 75.0 μm c- 7.5 ´ 106 μm d- 7.5 ´ 1012 μm
16-Which of these quantities represents the largest mass?
a- 2.0 ´ 102 mg b- 0.0010 kg c- 1.0 ´ 105 mg d- 2.0 ´ 102 cg\
17-The smallest value of the following is?
a- 0.03 mm b- 3 μm c- 0.3 nm d- 3000 pm
18-The largest value of the following is?
a- 0.03 mm b- 3 μm c- 0.3 nm d- 3000 pm
19-1.27 μm is equal to:
a- 1.27 x 10-10 m b- 1.27 x 10-3 mm c- 1.27 x 10+3 pm d- 1.27 x 10-2 m
20-1.27 Å is equal to:
a- 1.27 x 10-10 m b- 1.27 x 10-3 mm c- 1.27 x 10+3 pm d- 1.27 x 10-2 m
21-1.27 nm is equal to:
a- 1.27 x 10-10 m b- 1.27 x 10-3 mm c- 1.27 x 10+3 pm d- 1.27 x 10-2 m
22-1.27 cm is equal to:
a- 1.27 x 10-10 m b- 1.27 x 10-3 mm c- 1.27 x 10+3 pm d- 1.27 x 10-2 m

[* تركي *]

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- إن شآء الله هـَ الشرح يوضح لك مسألة التحويل



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