Download App

Some Basic Concepts of Chemistry — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistrySome Basic Concepts of Chemistry2 Marks
Question
What is the difference between 5.0g and 5.00g?
✓

Answer

Though the two values seem to be equivalent but scientifically they are different. 5.0g has two significant figures and hence, its precision is 0.1 part in 5, i.e. 20 ppt 5.00 has three significant figures and hence, its precision is 0.01 parts in 5, i.e. 2 ppt. Hence, 5.00g is more precise measurement than 5.0g.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Some Basic Concepts of Chemistry→Some Basic Concepts of Chemistry — all question types→Chemistry STD 11 Science question papers→Rajasthan Board STD 11 Science question papers→Rajasthan Board question paper generator→

Similar questions

A liquid is in equilibrium with its vapour in a sealed container at a fixed temperature. The volume of the container is suddenly increased.
What happens when equilibrium is restored finally and what will be the final vapour pressure?
→
In three moles of ethane $\left( C _2 H _6\right)$, calculate the following :
(i) Number of moles of carbon atoms.
(ii) Number of moles of hydrogen atoms.
(iii) Number of molecules of ethane.
→
  1. How many sigma and pi bonds are there in the following molecule.

$\text{CH}_2=\text{CH}-\text{CH}_2-\text{C}\equiv\text{CH}$

  1. Which type of hybrid orbitals are used by the second carbon atom in the following molecule.

$\text{CH}\equiv\text{C}-\text{CH}_2-\text{CH}=\text{CH}_2$

→
Give one point to differentiate the following thermodynamic terms:
  1. Extensive properties and intensive properties.
  2. Isothermal process and isobaric process.
→
IF SHE (Standard Hydrogen Electrode) acts as anode and given metal acts as cathode, what is the sign of the reduction potential of metal?
→
Calculate the bond enthalpy of Cl-Cl bond from the following data:
CH4(g) + Cl2(g) → CH3Cl(l) + HCl(l); $[\Delta\text{H}=-100.3\text{kJ mol}^{-1}]$
Given, bond enthalpies of C-H, C-Cl and H-Cl bonds are 413, 326 and 431kJ mol-1 respectively.
→
Bond angle in NH3 is more than in H2O. Justify.
→
What do you meant by spontaneity? Explain.
→
How many atoms are present in 16g of ozone?
→
Among the molecules, NO+, N2, SnCl2 and $\text{NO}^-_2,$ identify the species which is isoelectronic with CO.
→