Surface Chemistry · Chemistry · AP EAPCET

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MCQ (Single Correct Answer)

1
Which of the following general reaction is an example for heterogeneous catalysis?
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2
Match List I with List II.
List I List II
A. Aerosol I. Milk
B. Foam II. Soap lather
C. Emulsion III. Cheese
D. Gel IV. Smoke
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3

' $X$ ' is a protecting colloid. The following data is obtained for preventing the coagulation of 10 mL of gold sol to which 1 mL of $10 \% \mathrm{NaCl}$ is added. What is the gold number of ' $X$ '?

$$ \begin{array}{ccl} \hline \text { Expt No. } & \begin{array}{c} \text { Weight of } X \text { (in mg) } \\ \text { added to gold sol } \end{array} & \text { Coagulation } \\ \hline 1 & 24 & \text { Not prevented } \\ \hline 2 & 23 & \text { Not prevented } \\ \hline 3 & 26 & \text { Prevented } \\ \hline 4 & 27 & \text { Prevented } \\ \hline 5 & 25 & \text { Prevented } \\ \hline \end{array} $$

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4
Which sol is used as intramuscular injection?
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5
Which of the following has maximum coagulating power in the coagulation of positively charged sol?
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6

Given below are two statements.

Statements I Easily liqueflable gases are readily adsorbed.

Statements II Adsorption enthalpy for physisorption is less compared to adsorption enthalpy for chemisorption.

The correct answer is

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7
The validity of Freundlich isotherm can be verified by plotting
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8

The correct order of coagulating power of the following ions to coagulate the positive sol is

$$\mathrm{\mathop {{{[Fe{{(CN)}_6}]}^{4 - }}}\limits_I ,\mathop {C{l^ - }}\limits_{II} ,\mathop {SO_4^{2 - }}\limits_{III}}$$

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9

The macromolecular colloids of the following are

I. Starch solution

II. Sulphur sol

III. Synthetic detergent

IV. Synthetic rubber

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10

Assertion (A) Animal skins are colloidal in nature.

Reason (R) Animal skin has positively charged particles.

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11

The diameters range of colloidal particles is approximately.

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12

In an adsorption experiment, a graph between $$\log (x / m)$$ versus $$\log p$$ was found to be linear with a slope of $$45^{\circ}$$. The intercept on $$\log (x / m)$$ axis was found to be 0.3010. The amount of gas adsorbed per gram of charcoal under a pressure of $$0.5 \mathrm{~atm}$$ is

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13

Among the following, in which type of chromatography, both stationary and mobile phases are in liquid state?

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14

The protective power of a lyophilic colloidal sol is expressed in terms of

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15

A plot of $$\log (x / m)$$ versus $$\log (p)$$ for adsorption of a gas on a solid gives a straight line with a slope of

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