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NEET Surface Chemistry PYQs with Solutions

538 previous year questions from Surface Chemistry (NEET UG Chemistry) with answers and solutions. Numbered list, year tags, and one-tap solutions — built for serious JEE / NEET practice.

538 questionsChemistry2001–2023Answers + solutions

About Surface Chemistry PYQs

Surface Chemistry has 538 previous year questions in the Quantrex Academy NEET UG Chemistry bank. The 220 questions in this list come from NEET (169), AIIMS (32) and JIPMER (19), spanning 2001 to 2023. Each question opens on its own page with the options, the correct answer and the worked solution where available.

NEET Surface Chemistry PYQs with Solutions

About Surface Chemistry PYQs

Questions by year (this list)

Surface Chemistry questions with solutions

Which of the following is a positively charged sol?

Pumice stone is an example of

Which one is an example of heterogenous catalysis?

Shown below are adsorption isotherms for a gas ' X ' at temperatures T_1, ~T_2 and T_3 : p and (x)/(m) represent pressure and extent of adsorption, respectively. The correct order

Given below are two statements : Statement I : In the coagulation of a negative sol, the flocculating power of the three given ions is in the order - Al ^ 3 + > Ba ^ 2 + > Na ^ +

The right option for the statement &quot;Tyndall effect is exhibited by&quot;, is:

Measuring Zeta potential is useful in determining which property of colloidal solution?

In which of the sols, the colloidal particles are with negative charge?

Which of the following statements is incorrect about colloidal solution?

Assertion : Lyophilic colloid protects lyophobic colloid. Reason : Lyophilic colloid particles cover up the particles of the lyophobic colloid.

Butter is a colloidal solution of

Which mixture of the solutions will lead to the formation of negatively charged colloidal [AgI] I ^ - sol?

The correct option representing a Freundlich adsorption isotherm is

Which of the following statements is incorrect?

Assertion : Fe(OH)_3 and As_2 ~S_3 colloidal sols on mixing precipitate. Reason : Fe(OH)_3 and As_2 ~S_3 combine and form precipitate of new composition.

Assertion : On passing electric current in colloidal solution they do not move towards anode or cathode. Reason : They do not contain any charge.

Assertion : Soap is mixed to form O/W emulsion. Reason : Soap reduces surface tension.

Red blood cells are placed in a solution and neither haemolysis nor crenation occurs. Therefore, the solution is

Which of the following is not a surfactant?

Bleeding due to a cut can be stopped by applying ferric chloride solution in the laboratory. This is due to

On which of the following properties, does the coagulating power of an ion depend?

The coagulation of 200 ~mL of a positive colloid took place when 0.73 ~g HCl was added to it without changing the volume much. The flocculation value of HCl for the colloid is

Assertion : Activity of an enzyme is pH -dependent. Reason : Change in pH affects the solubility of the enzyme in water.

Which of the following is not applicable to the phenomenon of adsorption?

Paints and hair creams are respectively

On the basis of Langmuir adsorption isotherm the amount of gas adsorbed at very high pressure.

Which one of the following characteristics is associated with adsorption?

The coagulation values in millimoles per litre of the electrolytes used for the coagulation of A s _ 2 S _ 3 are given below, I . (NaCl) = 52 II . (BaC l _ 2 ) = 0.69 III . (MgS O

Fog is a colloidal solution of:

A colloidal solution is kept in dark and is illuminated by a beam of light then, brightness appears at the right angle of direction of light. This effect is called

Assertion: Fe^ 3+ can be used for coagulation of As_2 ~S_3 sol. Reason: Fe^ 3+ reacts with As_2 ~S_3 to give Fe_2 ~S_3 .

Which of the following represents physical adsorption?

In an experiment, addition of 4.0 mL of 0.005 M BaCl_2 to 16.0 mL of arsenious sulphide sol just causes complete coagulation in 2 h . The flocculating value of the effective ion is

Which property of colloidal solution is independent of charge on the colloidal particles?

Purification of colloids is done by

Which one of the following is an example for homogeneous catalysis?

Assertion : Coagulation power of Al^ 3+ is more than Na^ + . Reason: Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy-Schulze

If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process?

Which of the following is an example for heterogeneous catalysis reaction?

Which property of colloids is not dependent on the charge on colloidal particles?

Which of the following statements is correct for the spontaneous adsorption of a gas?

According to Hardy schulze law, the flocculating power of an ion increases with

Assertion : Catalyst changes Gibbs free energy of system. Reason : Catalyst changes pre-exponential factor of a chemical reaction.

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

In the presence of a catalyst, the heat evolved or absorbed during the reacton

A colloidal solution is kept in dark and is illuminated by a beam of light then brightness appears at the right angle of direction of light. This effect is called

Cow milk, an example of natural emulsion, is stabilised by

Which one of the following statements is incorrect about enzyme catalysis?

The ease of adsorption of the hydrated alkali metal ions on an ion-exchange resins follows the order

In Freundlich adsorption isotherm, the value of 1 / n is

The protecting power of lyophilic colloidal sol is expressed in terms of

Which of the following is incorrect for physisorption?

If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process?

Butter is an example of which type of colloid?

The number of phase in a colloidal system is

Which of the following is correct?

Correct equation of Freundlich isotherm is

Gold number is associated with

Which one of the following forms micelles in aqueous solution above certain concentration?

The Langmuir adsorption isotherm is deduced using the assumption:

Assertion : Fe^ 3+ can be used for coagulation of As_2 ~S_3 sol. Reason : Fe^ 3+ reacts with As_2 ~S_3 to give Fe_2 ~S_3 .

A plot of (x / m) versus p for the adsorption of a gas on a solid gives a straight line with slope equal to:

Which of the following forms micelles in aqueous solution above certain concentration?

Assertion : Aqueous gold colloidal solution is red in colour. Reason : The colour arises due to scattering of light by colloidal gold particles.

Assertion : Alcohols are dehydrated to hydrocarbons in the presence of acidic zeolites. Reason : Zeolites are porous catalysts.

Which of the following statement is not correct?

Solvent loving colloids are known as

Which of the following forms cationic micelles above certain concentration?

Assertion : Activity of an enzyme is pH dependent. Reason : Change in pH affects the solubility of the enzyme in water.

Assertion : Haemoglobin is an oxygen carrier. Reason : Oxygen binds as O_2^ - to Fe of haemoglobin.

Assertion : The micelle formed by sodium stearate in water has -COO^ - groups at the surface. Reason : Surface tension of water is reduced by the addition of stearate.

According to the adsorption theory of catalysis, the speed of the reaction increases because

Enzymes with two sites are called

The size of colloidal particle is

Assertion : Physical absorption of molecules takes place on surface only. Reason : In this process, the bonds of the absorbed molecules are broken.

Assertion : An increase in surface area increases the rate of evaporation. Reason : Stronger the inter-molecular attractive forces, fast is the rate of evaporation at a given

The right option for the statement "Tyndall effect is exhibited by", is: