Q.

Measurement means the comparison of an unknown quantity with some known quantity. This known fixed quantity is called:

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a

Estimate

b

Chemical quantity

c

Unit

d

Physical quantity

answer is C.

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Detailed Solution

  • Measurement means the comparison of an unknown quantity with some known quantity. This known fixed quantity is called a unit.
  • For example, when we measure the length of a box using a ruler, we compare the length of the box with the centimetre unit given on a ruler.
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Therefore, 'Unit' is the correct response.

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