1
TS EAMCET 2020 (Online) 14th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following is true for spontaneous adsorption?

A

$\Delta G>0, \Delta S>0, \Delta H<0$

B

$\Delta G>0, \Delta S>0, \Delta H>0$

C

$\Delta G<0, \Delta S<0, \Delta H<0$

D

$\Delta G<0, \Delta S>0, \Delta H<0$

2
TS EAMCET 2020 (Online) 14th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The charge of " $\mathrm{SnO}_2-\mathrm{sol}^{\prime}$ in alkaline and acidic medium are respectively

(Hint $\mathrm{SnO}_2$ is amphoteric oxide)

A

positive and positive

B

negative and negative

C

positive and negative

D

negative and positive

3
TS EAMCET 2020 (Online) 11th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

To resist the coagulation of 100 cc gold sol; 1 cc of $10 \% \mathrm{NaCl}$ is added to it in the presence of $10^{-4} \mathrm{~g}$ gelatin. The gold number of gelatin is

A

0.00001

B

0.0001

C

0.001

D

0.01

4
TS EAMCET 2020 (Online) 10th September Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following statements is correct for chemisorption?

A

Chemisorption is reversible.

B

Multilayer adsorption takes place.

C

Adsorption increases with temperature.

D

The heat of adsorption is generally less than $40 \mathrm{~kJ} \mathrm{~mol}^{-1}$.

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