JEE Main · 2023 · 13 Apr 2023 · Shift 1 · Surface Chemistry

What happens when a lyophilic sol is added to a lyophobic sol?

(A)Lyophilic sol is dispersed in lyophobic sol.
(B)Film of lyophobic sol is formed over lyophilic sol.
(C)Lyophobic sol is coagulated
(D)Film of lyophilic sol is formed over lyophobic sol.✓ Correct

Answer: (D)

Solution

A lyophilic sol has a strong affinity for the dispersion medium and is highly stable, whereas a lyophobic sol is easily coagulated. When a lyophilic sol is added to a lyophobic sol, its particles gather around the lyophobic particles and coat them. This protective layer shields the lyophobic particles and prevents their coagulation. Thus a film of the lyophilic sol is formed over the lyophobic sol.

JEE Main · 2023 · 13 Apr 2023 · Shift 1 · Single correct option

Practise more: all JEE Main PYQs on Surface Chemistry →

More JEE Main questions on Surface Chemistry

The adsorbent used in adsorption chromatography is/are
A. silica gel
B. alumina
C. quick lime
D. magnesia

Choose the most appropriate answer from the options given below :
JEE Main 2024View solution →
Identity the incorrect pair from the following:
JEE Main 2024View solution →
For the adsorption of hydrogen on platinum, the activation energy is $30 kJ mol^{- 1}$ and for the adsorption of hydrogen on nickel, the activation energy is $41.4 kJ mol^{- 1}$ . The logarithm of the ratio of the rates of chemisorption on equ …
JEE Main 2023View solution →
The number of colloidal systems from the following, which will have 'liquid' as the dispersion medium, is ____

Gem stones, paints, smoke, cheese, milk, hair cream, insecticide sprays, froth, soap lather.
JEE Main 2023View solution →
Coagulating value of electrolytes $AlCl_{3}$ and NaCl for $As_{2} S_{3}$ are 0.09 and 50.04 respectively. The coagulating power of $AlCl_{3}$ is $x$ times the coagulating power of NaCl . The value of $x$ is
____ :
JEE Main 2023View solution →
Ferric chloride is applied to stop bleeding because:
JEE Main 2023View solution →