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1
JEE Main 2023 (Online) 13th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : The diameter of colloidal particles in solution should not be much smaller than wavelength of light to show Tyndall effect.

Reason R : The light scatters in all directions when the size of particles is large enough.

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

A
Both A and R are correct and R is the correct explanation of A
B
A is true but R is false
C
Both A and R are correct but R is NOT the correct explanation of A
D
A is false but R is true
2
JEE Main 2023 (Online) 13th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
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What happens when a lyophilic sol is added to a lyophobic sol?

A
Film of lyophobic sol is formed over lyophilic sol.
B
Lyophilic sol is dispersed in lyophobic sol.
C
Film of lyophilic sol is formed over lyophobic sol.
D
Lyophobic sol is coagulated
3
JEE Main 2023 (Online) 12th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
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Four gases A, B, C and D have critical temperatures $$5.3,33.2,126.0$$ and $$154.3 \mathrm{~K}$$ respectively. For their adsorption on a fixed amount of charcoal, the correct order is:

A
D > C > B > A
B
C > B > D > A
C
D > C > A > B
D
C > D > B > A
4
JEE Main 2023 (Online) 10th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
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Ferric chloride is applied to stop bleeding because -

A
$$\mathrm{FeCl}_{3}$$ reacts with the constituents of blood which is a positively charged sol.
B
Blood absorbs $$\mathrm{FeCl}_{3}$$ and forms a complex.
C
$$\mathrm{Cl}^{-}$$ ions cause coagulation of blood.
D
$$\mathrm{Fe}^{3+}$$ ions coagulate blood which is a negatively charged sol.
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