Tag: measurement of properties

Questions Related to measurement of properties

The correctly reported answer of the addition of 4.523, 2.3 and 6.24 will have significant figures

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. 2

  2. 3

  3. 4

  4. 5

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Correct Option: A

314.000 has how many significant figures.

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. 6

  2. 3

  3. 5

  4. 4

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Correct Option: A

How many significant figures in 0.00025 ?

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. 6

  2. 3

  3. 4

  4. 2

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Correct Option: D

Number of significant figures in $ 2000\times 10^2$ is ____ .

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. 6

  2. 1

  3. 4

  4. Infinite

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Correct Option: A

The number of significant figure in $\pi$ are:

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. Three

  2. Infinite number

  3. Zero

  4. One

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Correct Option: B

Which of the following has two significant figures?

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. $0.070$

  2. $0.70$

  3. $7.0$

  4. $70$

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Correct Option: A,B,C
Explanation:


Leading Zeroes are not significant because these zeroes only serve as space holder. They are there to put decimal point in correct location. Trailing zeroes in a number containing decimal point are significant.

Leading zeroes in whole number are never significant so 70 has only 1 significant figure.

So, option A, B and C are correct.

Which of the following have same significant figures?

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. $6.02\times 10^{23}$

  2. $7.70\times 10^{-20}$

  3. $7.50$

  4. $0.75$

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Correct Option: A,B,C
Explanation:

The number of single digits that are important in the coefficient of an expression in scientific notation is termed as significant number.


$(A),(B)$ & $(C)$ have $3$ significant figures.

Wheras, $(D)$ has only $2$ significant figures.

Statement I: The number $5,007$ has three significant figures
Because
Statement II: Zeros between non-zero digits are significant

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. one is True, second is  True and currect expilanation

  2. one is true and second is true

  3. one is true  and second is False

  4. one is False and  second is True

  5. False False

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Correct Option: D
Explanation:

 Statement I: The number $5,007$ has four significant figures
Because
Statement II: Zeros between non-zero digits are significant
Hence, the statement I is false and statement II is true.

Which choice shows the answer to the following mathematical operation with the correct number of significant figures?
$14.5-3.46=$______

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. $11$

  2. $10$

  3. $11.04$

  4. $11.0$

  5. $11.4$

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Correct Option: D
Explanation:

      $14.5-3.46=11.04$

In subtraction, the final answer is written as the same number of decimal places as that of the term with the least number of decimal places.
  $\therefore$ The answer is $11.0$

Which choice shows the answer to the following mathematical operation with the correct number of significant figures?


$2.8\times 8.96 = ? $

chemistry measurement and data processing and analysis uncertainties and errors, graphical techniques uncertainty in measurement measurement of properties

  1. $25.09$

  2. $25.1$

  3. $25$

  4. $25.08$

  5. $25.088$

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Correct Option: B
Explanation:

In multiplication, the final answer is reported as the same number of decimal places as that of the term with the least number of decimal places.


$2.8\times 8.96=25.088=25.1$

Hence, the correct answer is option $B$.