# Solved papers for NEET Chemistry NEET PYQ-Surface Chemistry

### done NEET PYQ-Surface Chemistry Total Questions - 24

• question_answer1) At the critical micelle concentration (cmc) the surfactant molecules:              [AIPMT 1998]

A)
decompose

B)
dissociate

C)
associate

D)
become completely soluble

• question_answer2) The   method   usually   employed   for   the precipitation of a colloidal solution is: [AIPMT 2000]

A)
dialysis

B)

C)
diffusion through animal membrane

D)
condensation

• question_answer3) Which of the following is correct? [AIPMT 2001]

A)
Cycloheptane is an aromatic compound

B)
Diastase is an enzyme

C)
Acetophenone is an ether

D)
All of the above

• question_answer4) Which is not correct regarding the adsorption of a gas on surface of solid?                 [AIPMT 2001]

A)
On increasing temperature adsorption increases continuously

B)
Enthalpy and entropy change is -ve

C)
Adsorption is more for some specific substance

D)
Reversible

• question_answer5) Position of non-polar and polar parts in Micelles: [AIPMT 2002]

A)
polar at outer surface but non-polar at inner surface

B)
polar at inner surface non-polar at outer surface

C)
distributed over all the surface

D)
are present in the surface only

• question_answer6) According to the adsorption theory of catalysis, the speed of the reaction increase because: [AIPMT 2003]

A)
absorption produces heat which increases the speed of the reaction

B)
adsorption lowers the activation energy of the reaction

C)
the concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption

D)
in the process of adsorption, the activation energy of the molecules becomes large

• question_answer7) The radioactive isotope$_{27}^{60}Co$ which is used in the treatment of cancer can be made by (n, p)reaction. For this reaction the target nucleus is: [AIPMT (S) 2004]

A)
$_{28}^{59}\text{Ni}$

B)
$_{27}^{59}\text{Co}$

C)
$_{28}^{60}\text{Ni}$

D)
$_{27}^{60}\text{Co}$

• question_answer8) Which of the following forms cationic micelles above certain concentration? [AIPMT (S) 2004]

A)
Sodium ethyl sulphate

B)
Sodium acetate

C)
Urea

D)
Cetyltrimethylammonium bromide

• question_answer9) A nuclide of an alkaline earth metal undergoes radioactive decay by emission of three $\alpha$-particles in succession. The group of the periodic table to which the resulting daughter element would belong is:                   [AIPMT (S) 2005]

A)
Group 14

B)
Group 16

C)
Group 4

D)
Group 6

• question_answer10) Which one of the following forms micelles in aqueous solution above certain concentration? [AIPMT (S) 2005]

A)
Urea

B)
Dodecyl trimethyl ammonium chloride

C)
Pyridinium chloride

D)
Glucose

• question_answer11) A plot of $\log \,m/x$ versus $\log \,\,p$ for the adsorption of a gas on a solid gives a straight line with slope equal to:         [AIPMT (S) 2006]

A)
- log k

B)
n

C)
$\frac{1}{n}$

D)
log k

• question_answer12) The Langmuir adsorption isotherm is deduced using the assumption:       [AIPMT (S) 2007]

A)
The adsorption takes place in multilayers

B)
The adsorption sites are equivalent in their ability to adsorb the particles

C)
The heat of adsorption varies with coverage

D)
The adsorbed molecules interact with each other

• question_answer13) If x is amount of adsorb ate and m is amount of adsorbent, which of the following relations is not related to adsorption process? [AIPMT (S) 2011]

A)
$\frac{x}{m}=f(T)$ at constant?

B)
$p=f(T)$ at constant $\left( \frac{x}{m} \right)$

C)
$\frac{x}{m}=p\times T$

D)
$\frac{x}{m}=f$(p) at constant T

• question_answer14) In Freundlich adsorption isotherm, the value of 1/n is                                        [AIPMT (S) 2012]

A)
between 0 and 1 in all cases

B)
between 2 and 4 in all cases

C)
1 in case of physical adsorption

D)
1 in case of chemisorption

• question_answer15) The protecting power of lyophilic colloidal sol is expressed in terms of      [AIPMT (S) 2012]

A)
coagulation value

B)
gold number

C)
critical micelle concentration

D)
oxidation number

• question_answer16) Which property of colloids is not dependent on the charge on colloidal particles?  [AIPMT 2014]

A)
Coagulation

B)
Electrophoresis

C)
Electro-osmosis

D)
TyndalI effect

• question_answer17) Which property of colloidal solution is independent of charge on the colloidal particles? [NEET 2015]

A)
Coagulation

B)
Electrophoresis

C)
Electroosmosis

D)
Tyndall effect

• question_answer18) Which one of the following characteristics is associated with adsorption?        [NEET - 2016]

A)
$\Delta G$is negative but $\Delta H$and $\Delta S$are positive

B)
$\Delta G,\Delta H$and $\Delta S$all are negative

C)
$\Delta G$and$\Delta H$are negative but$\Delta S$ is positive

D)
$\Delta G$and $\Delta S$ are negative but $\Delta H$is positive

• question_answer19) The addition of a catalyst during a chemical reaction alters which of the following quantities? [NEET - 2016]

A)
Entropy

B)
Internal energy

C)
Enthalpy

D)
Activation energy

• question_answer20) Fog is colloidal solution of:-       [NEET - 2016]

A)
Liquid in gas

B)
Gas in liquid

C)
Solid in gas

D)
Gas in gas

• question_answer21) Which one of the following statements is not correct?                                               [NEET-2017]

A)
Coenzymes increase the catalytic activity of enzyme

B)
Catalyst does not initiate any reaction

C)
The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium

D)
Enzymes catalyse mainly bio-chemical reactions

• question_answer22) On which of the following properties does the coagulating power of an ion depend? [NEET - 2018]

A)
Both magnitude and sign of the charge on the ion

B)
Size of the ion alone

C)
The magnitude of the charge on the ion alone

D)
The sign of charge on the ion alone

• question_answer23) Which mixture of the solution will lead to the formation of negatively charged colloidal $[AgI]{{I}^{}}$ [NEET 2019]

A)
$50mL\text{ }of\text{ }2M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }1.5M\text{ }KI$

B)
$50mL\text{ }of\text{ }0.1M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }0.1M\text{ }KI$

C)
$50mL\text{ }of\text{ }1M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }1.5M\text{ }KI$

D)
$50mL\text{ }of\text{ }M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }2M\text{ }KI$

• question_answer24) Measuring Zeta potential is useful in determining which property of colloidal solution? [NEET 2020]

A)
Solubility

B)
Stability of the colloidal particles

C)
Size of the colloidal particles

D)
Viscosity