Class 9 Chemistry · Chapter 12 · Test 5
Data Analysis Review
25 MCQs covering SI units standardization base and derived units prefixes scientific notation measurement choices accuracy precision systematic errors random errors and reliable scientific communication.
25 questions · 20 min · 25 marks
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Sample questions
The first 5 of 25. Try each one, then tap to see the answer.
Question 1
What is the main purpose of using SI units in science?
- ATo provide a common standard for measurements
- BTo eliminate all measurement errors
- CTo replace experiments
- DTo avoid using numerical values
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Answer: A
SI units provide a common standard that allows scientists to communicate and compare measurements.
Question 2
How many SI base units are there?
- ASeven
- BFive
- CThree
- DTwenty two
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Answer: A
The chapter states that the SI system has seven base units.
Question 3
How many base physical quantities are generally used in Chemistry according to the chapter?
- AFive
- BSeven
- CThree
- DTen
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Answer: A
The five are length time amount of substance mass and temperature.
Question 4
Which of the following is an SI base unit?
- AMetre
- BNewton
- CJoule
- DPascal
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Answer: A
Metre is a base SI unit while newton joule and pascal are derived units.
Question 5
Which symbol represents the SI unit of mass?
- Akg
- BK
- CKg
- Dgm
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Answer: A
The SI symbol for kilogram is kg.
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