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How many significant figures are present in the 208?

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प्रश्न

How many significant figures are present in the 208?

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उत्तर

208 - There are 3 significant figures.

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पाठ 1: Some Basic Concepts of Chemistry - EXERCISES [पृष्ठ २६]

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एनसीईआरटी Chemistry Part 1 and 2 [English] Class 11
पाठ 1 Some Basic Concepts of Chemistry
EXERCISES | Q 1.19 - (ii) | पृष्ठ २६

व्हिडिओ ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्‍न

Round up the following upto three significant figures:

34.216


A screw gauge has a pitch of 1.0 mm and 200 divisions on the circular scale. Do you think it is possible to increase the accuracy of the screw gauge arbitrarily by increasing the number of divisions on the circular scale?


The mean diameter of a thin brass rod is to be measured by vernier callipers. Why is a set of 100 measurements of the diameter expected to yield a more reliable estimate than a set of 5 measurements only?


The length, breadth, and thickness of a rectangular sheet of metal are 4.234 m, 1.005 m, and 2.01 cm respectively. Give the area and volume of the sheet to correct significant figures.


The mass of a box measured by a grocer’s balance is 2.300 kg. Two gold pieces of masses 20.15 g and 20.17 g are added to the box. What is

  1. What is the total mass of the box?
  2. What is the difference in the masses of the pieces to correct significant figures?

State the number of significant figures in the following:

2.64 × 1024 kg


State the number of significant figures in the following:

0.2370 g cm–3


State the number of significant figures in the following: 

6.032 N m–2


Describe what is meant by significant figures.


Solve the numerical example.

Nuclear radius R has a dependence on the mass number (A) as R =1.3 × 10-16 A1/3 m. For a nucleus of mass number A = 125, obtain the order of magnitude of R expressed in the meter.


Solve the numerical example.

Write down the number of significant figures in the following: 0.003 m2, 0.1250 gm cm-2, 6.4 x 106 m, 1.6 x 10-19 C, 9.1 x 10-31 kg.


Solve the numerical example.

The diameter of a sphere is 2.14 cm. Calculate the volume of the sphere to the correct number of significant figures.


Write a short note on the following.

Rounding - off


Taking into account of the significant figures, what is the value of 9.99 m – 0.0099 m?


The sum of the numbers 436.32, 227.2 and 0.301 in appropriate significant figures is ______.


The mass and volume of a body are 4.237 g and 2.5 cm3, respectively. The density of the material of the body in correct significant figures is ______.


The length and breadth of a rectangular sheet are 16.2 cm and 10.1cm, respectively. The area of the sheet in appropriate significant figures and error is ______.


The radius of Earth is written as 0.64 × 10⁷ m in scientific notation. What is its order of magnitude?


The radius of Earth is expressed as 0.64 × 10⁷ m in scientific notation. What is its order of magnitude and number of significant figures?


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