Surface Chemistry

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Ans. (8.00)

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.

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

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

Micelles are not formed because it formed above CMC.

Freundlich adsorption isotherm

$\frac{x}{m}=k{p}^{1/n}$            

$log\frac{x}{m}=\frac{1}{n}logp+logk$           

Comparing with y = mx + C

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

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.

Keq. = ( [C] [D])/ ( [A] [B])

Keq = (10 * 6)/ (2 * 3) = 10

ΔG° = −2.303RTlog Keq. = −2.303 (2) (300) (log 10)

= −1381.8cal (? R = 2cal/molk)

When the reactants and the catalyst are in different phases, then the catalysis is known as heterogenous catalysis.

1. N? (g) + 3H? (g) - (Fe (s)-> 2NH? (g) (Heterogenous catalysis)

2. 2SO? (g) + O? (g) - (NO (g)-> 2SO? (g) (Homogenous catalysis)

3. C? H? O? (aq) + H? O (l) → C? H? O? (aq) + C? H? O? (aq) (Homogenous catalysis)

4. NO (g) + O? (g) → NO? (g) + O? (g)

Aspirin and paracetamol belongs to the class of non-narcotic analgesic.
Morphine and heroin are narcotic analgesics.