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31 Year NEET Previous Year Questions: Surface Chemistry


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16 Questions MCQ Test Chemistry 31 Years NEET Chapterwise Solved Papers | 31 Year NEET Previous Year Questions: Surface Chemistry

31 Year NEET Previous Year Questions: Surface Chemistry for NEET 2023 is part of Chemistry 31 Years NEET Chapterwise Solved Papers preparation. The 31 Year NEET Previous Year Questions: Surface Chemistry questions and answers have been prepared according to the NEET exam syllabus.The 31 Year NEET Previous Year Questions: Surface Chemistry MCQs are made for NEET 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for 31 Year NEET Previous Year Questions: Surface Chemistry below.
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31 Year NEET Previous Year Questions: Surface Chemistry - Question 1

For adsorption of a gas on a solid, the plot of log x/m vs log P is linear with slope equal to (n being whole number) [1994,2006]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 1

According to Freundlich adsorption isotherm.
At intermediate pressure, extent of adsorption

is linear with slope

31 Year NEET Previous Year Questions: Surface Chemistry - Question 2

During dialysis [1996]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 2

The use of membrane for separating colloidal particles is termed as dialysis. Hence it is clear that colloidal particle cannot pass through animal membrane. Hence only solvent molecules and ions (in case of electrodialysis) can diffuse.

31 Year NEET Previous Year Questions: Surface Chemistry - Question 3

The ability of an ion to bring about coagulation of a given colloid depends upon [1997]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 3

According to the Hardyschulze rule the coagulating effect of an ion on dispersed phase of opposite charge increases with the valency of the ion. Therefore more the charge on oppositely charged ion higher is the coagulation value

31 Year NEET Previous Year Questions: Surface Chemistry - Question 4

At the critical micelle concentration (CMC) the surfactant molecules [1998]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 4

The critical micelle con centration is the lowest concentration at which micelle formation appears when surfectants are present above that CMC, they can act as emulsifiers that will solubilise a compound which is normally insoluble in the solvent being used.

31 Year NEET Previous Year Questions: Surface Chemistry - Question 5

Hardy- Schulzerule explains the effect of electrolytes on the coagulation of colloidal solution. According to this rule, coagulation power of cations follow the order [1999]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 5

According to this law the  coagulating effect of an ion on dispersed phase of opposite charge increases with the valency of the ion.
The precipitating power of Al3+ , Ba++, Na+ ions is in order Al3+ > Ba2+ > Na+.

31 Year NEET Previous Year Questions: Surface Chemistry - Question 6

Which is used for ending charge on colloidal solution? [2000]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 6

Electrolyte is used forending charge on colloidal particles.

31 Year NEET Previous Year Questions: Surface Chemistry - Question 7

Pure water can be obtained from sea water by[2001]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 7

Pure water can be obtained from seawater by reverse osmosis. The osmotic pressure of   sea water is 25 atm at 15°C. When pressure greater than 26 atm is applied on sea water separated by a rigid semipermeable membrane, pure water is obtained.

31 Year NEET Previous Year Questions: Surface Chemistry - Question 8

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

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 8

Adsorption is the ability of a substance to concentrate or hold gases, liquids or dissolved substances upon its surface. Solids adsorb greater amounts of substances at lower temperature. In general, adsorption decreases with increase in temperature. Read more on Sarthaks.com - https://www.sarthaks.com/229289/which-correct-regarding-the-adsorption-surface-solid-increasing-temperature-adsorption

31 Year NEET Previous Year Questions: Surface Chemistry - Question 9

Position of non-polar and polar part in micelle is[2002]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 9

31 Year NEET Previous Year Questions: Surface Chemistry - Question 10

According to the adsorption theory of catalysis, the speed of the reaction increases because- [2003]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 10

According to the adsor ption theory of catalysis, the activity of catalysis is due to the presence of free valencies on its surface due to which surface of catalyst has chemical force of altraction. When a gas comes in contact with this surface molecules get attached attached through these valencies.
Further the rate of reaction is always increases by decreases in activation energy When any of the reactants is strongly adsorbed on the surface of catalyst, the rate becomes inversely proportional to the concentration of that reaction. The reaction is then said to be inhibited by such reactant.
The lowering of activation energy always leads to the increase in speed of reaction.

31 Year NEET Previous Year Questions: Surface Chemistry - Question 11

Which of the following forms cationic micelles above certain concentration [2004]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 11

Cetyl trimethyl ammonium bromide,  is a cationic micelle

31 Year NEET Previous Year Questions: Surface Chemistry - Question 12

Which one of the following forms micelles in aqueous solution above certain concentration?  [2005]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 12

Micelle formation is sh own by surfactants detergents (Dodecyl trimethyl ammonium chloride) in their aqueous solutions

31 Year NEET Previous Year Questions: Surface Chemistry - Question 13

The Langmuir adsorption isotherm is deduced using the assumption [2007]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 13

Langmuir adsorption isotherm is based on the assumption that every adsorption site is  equivalent and the ability of a particle to bind there is independent of whether or not nearby sites are occupied.

31 Year NEET Previous Year Questions: Surface Chemistry - Question 14

If x is amount of adsorbate and m is amount of adsorbent, which of the following relations is not related to adsorption process ? [2011]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 14

The variation in the amount of gas adsorbed by the adsorbent with pressure at constant temperature can be expressed by means of a curve termed as adsorption isotherm. It is represented as 

Among all the given options, incorrect option is  

31 Year NEET Previous Year Questions: Surface Chemistry - Question 15

In Freundlich Adsorption isotherm, the value of 1/n is:[2012]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 15

According to Freundlich Adsorption isotherm

at low pressure  

at high pressure  

 i.e. the value of n varies between 0 to 1

31 Year NEET Previous Year Questions: Surface Chemistry - Question 16

The protecting power of lyophilic colloidal sol is expressed in terms of : [2012]

Detailed Solution for 31 Year NEET Previous Year Questions: Surface Chemistry - Question 16

The lyophobic sols are less stable th an lyophilic sols. The lyophilic sols are thus used to protect the lyophobic sols. This property of lyophilic sols is known as protective action of lyophilic sols.
Which can be represented by gold number.

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