Use Coupon: CART20 and get 20% off on all online Study Material

Total Price: R

There are no items in this cart.
Continue Shopping
Get instant 20% OFF on Online Material.
coupon code: MOB20 | View Course list

Get extra R 650 off


6 years ago


Answers : (3)


Dear rahul,

Every measurement has a degree of uncertainty associated with it. The uncertainty derives from the measuring device and from the skill of the person doing the measuring. Let's use volume measurement as an example. Say you are in a chemistry lab and need 7 mL of water. You could take an unmarked coffee cup and add water until you think you have about 7 milliliters. In this case, the majority of the measurement error is associated with the skill of the person doing the measuring. You could use a beaker, marked in 5 mL increments. With the beaker, you could easily obtain a volume between 5 and 10 mL, probably close to 7 mL, give or take 1 mL. If you used a pipette marked to with 0.1 mL, you could get a volume between 6.99 and 7.01 mL pretty reliably. It would be untrue to report that you measured 7.000 mL using any of these devices, because you didn't measure the volume to the nearest microliter. You would report your measurement using significant figures. These include all of the digits you know for certain plus the last digit, which contains some uncertainty.


We are all IITians and here to help you in your IIT JEE preparation.

All the best.

 If you like this answer please approve it....

win exciting gifts by answering the questions on Discussion Forum

Sagar Singh

B.Tech IIT Delhi

6 years ago

To be very general u can say them approximation.They are used to figure out a single whole number nearest to it such that the error in counting is least.

6 years ago

significant figures are the number of meaningful digits in a number

for example

2.308 has four significant figures.

while doing any experiment,there is some uncertainity in the experiment.

this uncertainity is expressed by writing the number of significant figures of the value obtained.

6 years ago

Post Your Answer

Other Related Questions on Physical Chemistry

The mass ofa nonvolatile solute of malar mass 40g/mol that should be dissolved in114g of octane to lower its vapour 20% is.........
For immiscible mixtures, the relation in pre partial pressures and mole fractioon is: Pa’/Pb’ = na/nb 0.2P/P = na/(114/114) na = 0.2 moles of solute. Mass of the solute = 0.2 * 40 => 8...
2017 years ago
How can we compare the dipole moment of CCl4 and CH2Cl2
@ apoorv in the case of ccl4 , they have tetrahedral shape and they are symmetric , so, they have dipole moment as 0 . in ch2cl2 the polarity vectors of two H atoms add up to cl atoms but...
Umakant biswal 29 days ago
The IP1 IP2 IP3 IP4 and Ip5 values of an element are 7.1 ,14.3 ,103.4 ,66.8 and 162.2 ev respectively the element belong to ________ Group !!
At 66.8 energy value the element becomes inert i think so, as the next IP is very much large. that is 162.2 ev. Therfore after loosing 4 elctrons it is becoming inert the elemnt should be...
Vikas TU 25 days ago
CO2 has the same geometry as: 1. HgCl2 2.NO2 3. SnCl4 4. C2H2
@ amisha option no 4 will turns out to be the correct option . so, C2H2 will be the answer here . in co2 the structure is linear and in c2h2 also the structure are linear , in co2 the bond...
Umakant biswal one month ago
C2H2 Because both the compounds have linear geometry due to SP hybridization.In NO2 due to 1 electron it has neither bent nor linear geometry.
Himanshu one month ago
how to memorize the qualitative analysis reactions. Need specifically in ENGLISH!
@ ashwin i am sorry , there is no shortcut for remembering the reactions in chemistry . so, what u have to do is make a chart and just remember the oxidising and reducing agent , then u can ...
Umakant biswal 16 days ago
List of compound and their uses of all chapter class11 chemistry
Hi, There are so many compounds, I suggest you to refer to NCERT everything is given there Thanks
Nishant Vora 3 months ago
@ rafi there are more than 100 of compounds are avaliable if u will refer to the whole class 11 th chemistry . so, kindly tell of which chapter u required , so, that i can give u of that...
Umakant biswal 3 months ago
View all Questions »

  • Complete JEE Main/Advanced Course and Test Series
  • OFFERED PRICE: R 15,000
  • View Details
Get extra R 3,750 off

Get extra R 650 off

More Questions On Physical Chemistry

Ask Experts

Have any Question? Ask Experts

Post Question

Answer ‘n’ Earn
Attractive Gift
To Win!!!
Click Here for details