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
  done clear
  B)
       dissociate          
  done clear
  C)
  associate
  done clear
  D)
  become completely soluble
  done clear
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• question_answer2) The   method   usually   employed   for   the precipitation of a colloidal solution is: [AIPMT 2000]
  A)
  dialysis
  done clear
  B)
                                           addition of electrolytes
  done clear
  C)
  diffusion through animal membrane
  done clear
  D)
  condensation
  done clear
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• question_answer3) Which of the following is correct? [AIPMT 2001]
  A)
  Cycloheptane is an aromatic compound
  done clear
  B)
  Diastase is an enzyme
  done clear
  C)
  Acetophenone is an ether
  done clear
  D)
  All of the above
  done clear
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• 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
  done clear
  B)
  Enthalpy and entropy change is -ve
  done clear
  C)
  Adsorption is more for some specific substance
  done clear
  D)
  Reversible
  done clear
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• question_answer5) Position of non-polar and polar parts in Micelles: [AIPMT 2002]
  A)
  polar at outer surface but non-polar at inner surface
  done clear
  B)
  polar at inner surface non-polar at outer surface
  done clear
  C)
  distributed over all the surface      
  done clear
  D)
  are present in the surface only
  done clear
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• 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
  done clear
  B)
  adsorption lowers the activation energy of the reaction
  done clear
  C)
  the concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption
  done clear
  D)
  in the process of adsorption, the activation energy of the molecules becomes large
  done clear
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• 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)
  \[_{28}^{59}\text{Ni}\]
  done clear
  B)
  \[_{27}^{59}\text{Co}\]
  done clear
  C)
  \[_{28}^{60}\text{Ni}\]
  done clear
  D)
  \[_{27}^{60}\text{Co}\]
  done clear
  View Answer play_arrow

• question_answer8) Which of the following forms cationic micelles above certain concentration? [AIPMT (S) 2004]
  A)
  Sodium ethyl sulphate
  done clear
  B)
  Sodium acetate
  done clear
  C)
  Urea
  done clear
  D)
  Cetyltrimethylammonium bromide
  done clear
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• 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
  done clear
  B)
  Group 16
  done clear
  C)
  Group 4
  done clear
  D)
  Group 6
  done clear
  View Answer play_arrow

• question_answer10) Which one of the following forms micelles in aqueous solution above certain concentration? [AIPMT (S) 2005]
  A)
  Urea     
  done clear
  B)
                               Dodecyl trimethyl ammonium chloride
  done clear
  C)
  Pyridinium chloride
  done clear
  D)
  Glucose
  done clear
  View Answer play_arrow

• 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
  done clear
  B)
  n         
  done clear
  C)
  \[\frac{1}{n}\]
  done clear
  D)
  log k
  done clear
  View Answer play_arrow

• question_answer12) The Langmuir adsorption isotherm is deduced using the assumption:       [AIPMT (S) 2007]
  A)
  The adsorption takes place in multilayers
  done clear
  B)
  The adsorption sites are equivalent in their ability to adsorb the particles
  done clear
  C)
  The heat of adsorption varies with coverage
  done clear
  D)
  The adsorbed molecules interact with each other
  done clear
  View Answer play_arrow

• 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?
  done clear
  B)
  \[p=f(T)\] at constant \[\left( \frac{x}{m} \right)\]
  done clear
  C)
  \[\frac{x}{m}=p\times T\]
  done clear
  D)
  \[\frac{x}{m}=f\](p) at constant T
  done clear
  View Answer play_arrow

• question_answer14) In Freundlich adsorption isotherm, the value of 1/n is                                        [AIPMT (S) 2012]
  A)
  between 0 and 1 in all cases
  done clear
  B)
  between 2 and 4 in all cases
  done clear
  C)
  1 in case of physical adsorption
  done clear
  D)
  1 in case of chemisorption
  done clear
  View Answer play_arrow

• question_answer15) The protecting power of lyophilic colloidal sol is expressed in terms of      [AIPMT (S) 2012]
  A)
  coagulation value
  done clear
  B)
  gold number
  done clear
  C)
  critical micelle concentration
  done clear
  D)
  oxidation number
  done clear
  View Answer play_arrow

• question_answer16) Which property of colloids is not dependent on the charge on colloidal particles?  [AIPMT 2014]
  A)
  Coagulation
  done clear
  B)
  Electrophoresis
  done clear
  C)
  Electro-osmosis
  done clear
  D)
  TyndalI effect
  done clear
  View Answer play_arrow

• question_answer17) Which property of colloidal solution is independent of charge on the colloidal particles? [NEET 2015]
  A)
  Coagulation
  done clear
  B)
  Electrophoresis
  done clear
  C)
  Electroosmosis
  done clear
  D)
  Tyndall effect
  done clear
  View Answer play_arrow

• 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
  done clear
  B)
  \[\Delta G,\Delta H\]and \[\Delta S\]all are negative
  done clear
  C)
  \[\Delta G\]and\[\Delta H\]are negative but\[\Delta S\] is positive
  done clear
  D)
  \[\Delta G\]and \[\Delta S\] are negative but \[\Delta H\]is positive
  done clear
  View Answer play_arrow

• question_answer19) The addition of a catalyst during a chemical reaction alters which of the following quantities? [NEET - 2016]
  A)
  Entropy
  done clear
  B)
  Internal energy
  done clear
  C)
  Enthalpy
  done clear
  D)
  Activation energy
  done clear
  View Answer play_arrow

• question_answer20) Fog is colloidal solution of:-       [NEET - 2016]
  A)
  Liquid in gas
  done clear
  B)
  Gas in liquid
  done clear
  C)
  Solid in gas
  done clear
  D)
  Gas in gas
  done clear
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• question_answer21) Which one of the following statements is not correct?                                               [NEET-2017]
  A)
  Coenzymes increase the catalytic activity of enzyme
  done clear
  B)
  Catalyst does not initiate any reaction
  done clear
  C)
  The value of equilibrium constant is changed in the presence of a catalyst in the reaction at equilibrium
  done clear
  D)
  Enzymes catalyse mainly bio-chemical reactions
  done clear
  View Answer play_arrow

• 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
  done clear
  B)
  Size of the ion alone
  done clear
  C)
  The magnitude of the charge on the ion alone
  done clear
  D)
  The sign of charge on the ion alone
  done clear
  View Answer play_arrow

• question_answer23) Which mixture of the solution will lead to the formation of negatively charged colloidal \[[AgI]{{I}^{}}\] [NEET 2019]
  A)
  \[50mL\text{ }of\text{ }2M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }1.5M\text{ }KI\]
  done clear
  B)
  \[50mL\text{ }of\text{ }0.1M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }0.1M\text{ }KI\]
  done clear
  C)
   \[50mL\text{ }of\text{ }1M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }1.5M\text{ }KI\]
  done clear
  D)
  \[50mL\text{ }of\text{ }M\text{ }AgN{{O}_{3}}+50mL\text{ }of\text{ }2M\text{ }KI\]
  done clear
  View Answer play_arrow

• question_answer24) Measuring Zeta potential is useful in determining which property of colloidal solution? [NEET 2020]
  A)
  Solubility
  done clear
  B)
  Stability of the colloidal particles
  done clear
  C)
  Size of the colloidal particles
  done clear
  D)
  Viscosity
  done clear
  View Answer play_arrow