Surface Chemistry

Which of the following curves is in accordance with Freundlich adsorption isotherm?

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Contributor-Level 10

Kindly consider the following figure

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a month ago

How many electrons per mole of Pt are transferred when aqua regia oxidized platinum?

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a month ago

6.84gm Al₂(SO₄)₃ is needed to coagulate 2.5 L of As₂S₃ sol completely in 2.0 hrs. The coagulation value of Al₂(SO₄)₃ in terms of millimoles per litre is:

[Atomic Mass : Al = 27, S = 32].

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Contributor-Level 10

Kindly go through the solution

Ans. (8.00)

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a month ago

The correct statement is:

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Contributor-Level 10

Factual
(A) Magnalium contain Al and Mg
(B) Bell metal ⇒ Cu and Sn
(C) Gun metal ⇒ Cu, Sn and Zn
(D) Chrome steel ⇒ Fe and Cr.

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a month ago

Which one is false in the following statements?

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Surface Chemistry Class 11th

Contributor-Level 10

Fe acts a catalyst and Mo acts as promoter in Haber's process.

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For a photochemical reaction A → B, 1.0*10^-5 mole of B were formed on absorbing 1.2 * 10¹⁹ photons, quantum efficiency is : (NA = 6 * 10²³)

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Contributor-Level 10

Number of mol of A reacted = 1*10? = 10?
Number of molecule of A = 10? * 6 *10²³
Quantum efficiency = (6 *10¹? ) / (1.2 *10¹? ) = 0.50

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a month ago

Using very little soap while washing clothes, does not serve the purpose of cleaning of clothes, because:

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Raj Pandey

Contributor-Level 9

Micelles are not formed because it formed above CMC.

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a month ago

In Freundlich adsorption isotherm, slope of AB line is:

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Contributor-Level 10

Freundlich adsorption isotherm

$\frac{x}{m} = k p^{1 / n}$

$l o g \frac{x}{m} = \frac{1}{n} l o g p + l o g k$

Comparing with y = mx + C

so, slope of given graph is $\frac{1}{n}$ whose value varies from 0 to 1.

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a month ago

Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A: SO₂(g) is adsorbed to a larger extent than H₂(g) on activated charcoal.
Reason R: SO₂(g) has a higher critical temperature than H₂(g).
In the light of the above statements, choose the most appropriate answer from the option given below.

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Contributor-Level 10

SO? is adsorbed more than H? on activated charcoal as critical temperature of SO? is higher than H? As higher the critical temperature, easier is liquifaction of gas and more is adsorption of gas on charcoal.

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a month ago

The equilibrium concentrations of the species in the reaction A + B ? C + D are 2, 3, 10 and 6 mol L^-1 respectively at 300 K. ΔG° for the reaction is (R = 2cal/molK)

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