JEE Main 2022 · 24 Jun · Shift 1 · Chemistry Q65

← JEE Main 2022 · 24 Jun · Shift 1

ChemistrySingle correct+4 / -1Question 65 of 90

Given below are two statements :

Statement I : Emulsions of oil in water are unstable and sometimes they separate into two layers on standing.

Statement II : For stabilisation of an emulsion, excess of electrolyte is added.

In the light of the above statements, choose the most appropriate answer from the options given below :

Both Statement I and Statement II are correct.

Both Statement I and Statement II are incorrect.

Statement I is correct but Statement II is incorrect.

Statement I is incorrect but Statement II is correct.

Answer and worked solution

Official answer: C

Statement I is correct: oil-in-water emulsions are unstable and can separate on standing.

Statement II is incorrect: emulsions are stabilised by an emulsifying agent (soap, gum, protein). Adding excess electrolyte destroys the charge on the droplets and breaks the emulsion.

(C)

Topics:Emulsions

← Previous question Next question →

JEE Main 2022 · 24 Jun · Shift 1, Chemistry question 65