Question
What is significant figures? Explain.
✓
Answer
The number of significant figures in purely obtained result of measurement is called significant figures. Therefore, in any measurement the significant digit is number of digits which are known with certainity and there is an uncertain digit along with them.
Ex. In 11.2 ml the digit 11 is certain and digit 2 is uncertain and last digit has uncertainity of $\pm 1$. Hence 11.2 ml has 3 significant figures.
Ex. In 11.2 ml the digit 11 is certain and digit 2 is uncertain and last digit has uncertainity of $\pm 1$. Hence 11.2 ml has 3 significant figures.
Need a full question paper?
Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
Explore more
Similar questions
Find energy of each of the photons which
(i) correspond to light of frequency $3 \times 10^{15} Hz$
(ii) have wavelength of $0.50 Å$
→(i) correspond to light of frequency $3 \times 10^{15} Hz$
(ii) have wavelength of $0.50 Å$
What will be the molarity of a solution. Which contains 5.58g of NaCl(s) per 500mL?
Mention the conditions of temperature and pressure when gas will dissolve in liquid to maximum extent with decrease in volume and absorption of heat.
The enthalpy of atomisation of CH4 is 1665kJ mol-1. What is bond enthalpy of C-H bond.
The enthalpy of vapourisation of CCl4 is 30.5kJ mol–1. Calculate the heat required for the vapourisation of 284g of CCl4 at constant pressure. (Molar mass of CCl4 = 154g mol–1).
What is Huckel's rule of aromaticity?
H3 PO3 can be represented by structures 1 and 2 shown below. Can these two structures be taken as the canonical forms of the resonance hybrid representing H3 PO3? If not, give reasons for the same.
A 1.25g sample of octane (C8H18) is burnt in excess of oxygen in a bomb calorimeter. The temperature of calorimeter rises from 294.05 to 300.78K. If heat capacity of the calorimeter is 8.93kJ K-1. Find heat transferred to calorimeter.
Use the following data to calculate the Ksp value for Agl(s)
→$\text{H}_{2}\text{(g)} + \text{Cl}_{2} \text{(g)} \rightleftharpoons\text{2HCl(g)}$
$\Delta\text{H}^{\circ} = -92\text{kJ}, \ \Delta\text{S}^{\circ} = -95\text{JK}^{-1}$
Among the elements Li, K, Ca, S and Kr, which one is expected to have the lowest first ionisation enthalpy and which one has the highest first ionisation enthalpy?