Download App

Adsorption and Colloids — Chemistry STD 11 Science — Question

Maharashtra BoardEnglish MediumSTD 11 ScienceChemistryAdsorption and Colloids3 Marks
Question
Why does adsorption occur?
✓

Answer

  • The adsorption phenomenon is caused by dispersion forces (also known as London dispersion forces or van der Waals forces) which are short range and additive. Adsorption force is the sum of all interactions between all the atoms.
  • The pulling interactions cause the surface of a liquid to tighten like an elastic film.
  • A measure of the elastic force at the surface of a liquid is called surface tension.
  • There is a tendency to have minimum surface tension, i.e., decrease of free energy, which leads to adsorption.

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 "Answer the following in brief." from Adsorption and Colloids→Adsorption and Colloids — all question types→Chemistry STD 11 Science question papers→Maharashtra Board STD 11 Science question papers→Maharashtra Board question paper generator→

Similar questions

Explain the importance of electronegativity.
→
Give reasons: Noble gases possess relatively large atomic size.
→
Give reason: Benzene has zero dipole moment and has no dipole$-$dipole forces yet it exists in liquid state.
→
Give reason: Helium which is the first element of group $18$ is placed in the $p-$block even though its last electron enters in $s$ subshell.
→
Identify from the following the isoelectronic species:
Ne, $O^{2-}, Na^+ OR Ar, Cl^{2-}, K^+$
→
Write the statement for :
(a) Boyle’s law
(b) Charles’ law
→
Which of the following redox couple is stronger oxidizing agent?
a. $Cl _2\left( E ^0=1.36 V \right)$ and $Br _2\left( E ^0=1.09 V \right)$
b. $MnO _4^{\Theta}( E 0=1.51 V )$ and $Cr _2 O _7^{2 \Theta}\left( E ^0=1.33 V \right)$
→
A certain mass of a gas occupies a volume of $0.2 \ dm^3$ at the temperature, $x K.$ Calculate the volume of the gas if its absolute temperature is doubled at same pressure.
→
What are synthetic antioxidants? Give an example.
→
Draw structures of following analgesics and write their molecular formula,
i. Aspirin
ii. Paracetamol
→