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1
JEE Main 2023 (Online) 25th January Evening Shift
Numerical
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The number of incorrect statement/s from the following is/are ___________

A. Water vapours are adsorbed by anhydrous calcium chloride.

B. There is a decrease in surface energy during adsorption.

C. As the adsorption proceeds, $$\Delta$$H becomes more and more negative.

D. Adsorption is accompanied by decrease in entropy of the system.

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2
JEE Main 2023 (Online) 24th January Evening Shift
Numerical
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The number of statement/s which are the characteristics of physisorption is __________

A. It is highly specific in nature

B. Enthalpy of adsorption is high

C. It decreases with increase in temperature

D. It results into unimolecular layer

E. No activation energy is needed

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3
JEE Main 2022 (Online) 28th July Evening Shift
Numerical
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-1
Out of Syllabus
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Among the following the number of curves not in accordance with Freundlich adsorption isotherm is ________.

(a) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 30 English 1

(b) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 30 English 2

(c) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 30 English 3

(d) JEE Main 2022 (Online) 28th July Evening Shift Chemistry - Surface Chemistry Question 30 English 4

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4
JEE Main 2022 (Online) 30th June Morning Shift
Numerical
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100 mL of 0.3 M acetic acid is shaken with 0.8 g of wood charcoal. The final concentration of acetic acid in the solution after adsorption is 0.125 M. The mass of acetic acid adsorbed per gram of carbon is _____________ $$\times$$ 10$$-$$4 g.

(Given : Molar mass of acetic acid = 60 g mol$$-$$1)

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