JEE Main & Advanced Chemistry Surface & Nuclear Chemistry / भूतल और नाभिकीय रसायन Question Bank

done Adsorption and adsorption isotherm Total Questions - 47

• question_answer1)
  Chemisorption
  A)
                  Involves the weak attractive interactions between adsorbent and adsorbate done clear
  B)
                  Is irreversible in nature done clear
  C)
                  Decreases with increase of temperature done clear
  D)
                  Involves multilayer formation of adsorbent on adsorbate done clear
  View Solution play_arrow

• question_answer2)
  Chemisorption
  A)
                  Increases with temperature done clear
  B)
                  Decreases with temperature done clear
  C)
                  Remains unaffected by change of temperature done clear
  D)
                  Either increases or decreases with temperature done clear
  View Solution play_arrow

• question_answer3)
  Which among the following statement is false [KCET (Med.) 2002]
  A)
                  The adsorption may be monolayered or multilayered     done clear
  B)
                  Particle size of adsorbent will not affect the amount of adsorption done clear
  C)
                  Increase of pressure increases amount of adsorption done clear
  D)
                  Increase of temperature may decrease the amount of adsorption done clear
  View Solution play_arrow

• question_answer4)
  Wood charcoal is used to decolourise sugar because it                                                                                                   [CPMT 2002]
  A)
                  Adsorbs coloured material done clear
  B)
                  Absorbs decolorised material done clear
  C)
                  Reduces coloured material done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer5)
  If the absorbate is held on a surface by weak Vander Waal's  forces, the absorption process is called [Kerala (Med.) 2002]
  A)
                  Physical adsorption         done clear
  B)
                  Chemical adsorption done clear
  C)
                  Heat of adsorption          done clear
  D)
                  Enthalpy of adsorption done clear
  View Solution play_arrow

• question_answer6)
  When the temperature is raised, the viscosity of liquid decreases, this is because             [Kerala (Med.) 2002]
  A)
                  Decreased volume of the solution done clear
  B)
                  Increase in temperature increases the average kinetic energy of molecules, which overcome the attractive force between them done clear
  C)
                  Decreased covalent and hydrogen bond forces done clear
  D)
                  Increased attraction between molecules done clear
  View Solution play_arrow

• question_answer7)
  A solid acts as an adsorbent because it has
  A)
                  A definite shape done clear
  B)
                  Small pores in it done clear
  C)
                  Unsaturated valencies done clear
  D)
                  A high lattice energy done clear
  View Solution play_arrow

• question_answer8)
  Point out the wrong statement :                 Physical adsorption is characterised by
  A)
                  Attraction due to weak Vander Waal's forces done clear
  B)
                  Irreversible nature of adsorption done clear
  C)
                  Multimolecular adsorption layers done clear
  D)
                  Decrease in adsorption with increase in temperature done clear
  View Solution play_arrow

• question_answer9)
  When the temperature is lowered and pressure is raised, the adsorption of a gas on a solid [MP PMT 1997]
  A)
                  Decreases done clear
  B)
                  Increases done clear
  C)
                  Remains unaffected done clear
  D)
                  Decreases first then increases done clear
  View Solution play_arrow

• question_answer10)
  In physical adsorption, the gas molecules are held on solid surface by     [MP PET 1996; AIIMS 1998]
  A)
                  Chemical forces                done clear
  B)
                  Electrostatic forces done clear
  C)
                  Gravitational forces        done clear
  D)
                  Vander Waal's forces done clear
  View Solution play_arrow

• question_answer11)
  Adsorption is multilayer in the case of    [MP PET 1999]
  A)
                  Physical adsorption         done clear
  B)
                  Chemisorption done clear
  C)
                  Both      done clear
  D)
                  None of both done clear
  View Solution play_arrow

• question_answer12)
  Physical adsorption
  A)
                  Involves the weak attractive interaction between the adsorbent and adsorbate done clear
  B)
                  Involves the chemical interactions between the adsorbent and adsorbate done clear
  C)
                  Is irreversible in nature done clear
  D)
                  Increases with increase of temperature done clear
  View Solution play_arrow

• question_answer13)
  The charge on \[A{{s}_{2}}{{S}_{3}}\] sol is due to the adsorbed [MP PMT 1985]
  A)
                  \[{{H}^{+}}\]      done clear
  B)
                  \[O{{H}^{-}}\] done clear
  C)
                  \[{{O}^{2-}}\]     done clear
  D)
                  \[{{S}^{2-}}\] done clear
  View Solution play_arrow

• question_answer14)
  In the adsorption of acetic acid on activated charcoal, the acetic acid is an             [MP PET 1994; MP PMT 2002]
  A)
                  Adsorber             done clear
  B)
                  Absorber done clear
  C)
                  Adsorbent          done clear
  D)
                  Adsorbate done clear
  View Solution play_arrow

• question_answer15)
  Sticking of one substance at the surface of another is called
  A)
                  Absorption         done clear
  B)
                  Chemisorption done clear
  C)
                  Adsorption         done clear
  D)
                  Desorption done clear
  View Solution play_arrow

• question_answer16)
  The charge on colloidal particles is due to
  A)
                  Presence of electrolyte done clear
  B)
                  Very small size of particles done clear
  C)
                  Adsorption of ions from the solution done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer17)
  Which one of the following statement is not correct
  A)
                  The extent of adsorption depends on the nature of the adsorbent and adsorbate done clear
  B)
                  The extent of adsorption depends on the pressure of the gas done clear
  C)
                  The extent of adsorption depends on the temperature done clear
  D)
                  The extent of adsorption has no upper limit done clear
  View Solution play_arrow

• question_answer18)
  For the adsorption of a gas on a solid, the plot of log (x/m) versus log P is linear with slope equal to          [CBSE PMT 1994]
  A)
                  k              done clear
  B)
                  log k done clear
  C)
                  n             done clear
  D)
                  1/n done clear
  View Solution play_arrow

• question_answer19)
  According to Langmuir adsorption isotherm, the amount of gas adsorbed at very high pressures               [MP PMT 1993]
  A)
                  Reaches a constant limiting value done clear
  B)
                  Goes on increasing with pressure done clear
  C)
                  Goes on decreasing with pressure done clear
  D)
                  Increases first and decreases later with pressure done clear
  View Solution play_arrow

• question_answer20)
  Which of the following statement  is not correct [MP PET 1993]
  A)
                  Physical adsorption is due to Vander Wall's forces done clear
  B)
                  Chemical adsorption decreases at high temperature and low pressure done clear
  C)
                  Physical adsorption is reversible done clear
  D)
                  Adsorption energy for a chemical adsorption is generally greater than that of physical adsorption done clear
  View Solution play_arrow

• question_answer21)
  In adsorption of oxalic acid on activated charcoal, the activated charcoal is known as
  A)
                  Adsorbent          done clear
  B)
                  Absorbate done clear
  C)
                  Adsorber             done clear
  D)
                  Absorber done clear
  View Solution play_arrow

• question_answer22)
  Adsorption is phenomenon is which a substance
  A)
                  Goes into the body of the other substance done clear
  B)
                  Remains close the other substance done clear
  C)
                  Accumulates on the surface of the other substance done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer23)
  Physical adsorption is essentially quite appreciable
  A)
                  At room temperature    done clear
  B)
                  At higher temperature done clear
  C)
                  At lower temperature   done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer24)
  Adsorption increase when
  A)
                  Temperature increases done clear
  B)
                  Temperature decreases done clear
  C)
                  Temperature remains constant done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer25)
  In chemical adsorption, how many layers are adsorbed [MP PMT 1996]
  A)
                  One       done clear
  B)
                  Two done clear
  C)
                  Multi     done clear
  D)
                  Zero done clear
  View Solution play_arrow

• question_answer26)
  The adsorption of a gas on a solid surface varies with pressure of the gas in which of the following manner [CPMT 1999]
  A)
                  Fast\[\to \]slow \[\to \]independent of the pressure done clear
  B)
                  Slow\[\to \]fast \[\to \] independent of the pressure done clear
  C)
                  Independent of the pressure \[\to \]fast\[\to \]slow done clear
  D)
                  Independent of the pressure \[\to \]slow \[\to \]fast done clear
  View Solution play_arrow

• question_answer27)
  Which of the following statements is not applicable to chemisorption     [KCET (Med.) 1999; BHU 2000]
  A)
                  It is slow done clear
  B)
                  It is irreversible done clear
  C)
                  It is highly specific done clear
  D)
                  It is independent of temperature done clear
  View Solution play_arrow

• question_answer28)
  Adsorption is always       [DPMT 2000]
  A)
                  Endothermic      done clear
  B)
                  Exothermic done clear
  C)
                  Either A or B       done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer29)
  The colloidal system consisting of a liquid adsorbent in a solid adsorbate is termed as
  A)
                  Aerosol done clear
  B)
                  Sol done clear
  C)
                  Foam done clear
  D)
                  Gel done clear
  View Solution play_arrow

• question_answer30)
  Which one of the following substances adsorb hydrogen gas most strongly
  A)
                  Activated carbon              done clear
  B)
                  Silica gel done clear
  C)
                  Platinum black   done clear
  D)
                  Iron powder done clear
  View Solution play_arrow

• question_answer31)
  According to the adsorption theory of catalysis, the speed of the reaction increases because      [CBSE PMT 2003]
  A)
                  Adsorption lowers the activation energy of the reaction                done clear
  B)
                  The concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption done clear
  C)
                  In the process of adsorption, the activation energy of the molecules becomes large done clear
  D)
                  Adsorption produces heat which increases the speed of the reaction done clear
  View Solution play_arrow

• question_answer32)
  In Freundlich adsorption, isotherm adsorption is proportional to pressure P as                                   [AMU 2002]
  A)
                  \[{{P}^{0}}\]       done clear
  B)
                  \[P\] done clear
  C)
                  \[{{P}^{n}}\]       done clear
  D)
                  \[{{P}^{1/n}}\] done clear
  View Solution play_arrow

• question_answer33)
  Which one of the following  characteristics is not correct for physical adsorption                                [AIEEE 2003]
  A)
                  Adsorption on solids is reversible done clear
  B)
                  Adsorption increases with increase in temperature done clear
  C)
                  Adsorption is spontaneous done clear
  D)
                  Both enthalpy and entropy of adsorption are negative done clear
  View Solution play_arrow

• question_answer34)
  Which of the following is not a characteristic of chemisorption                                    [KCET 2003]
  A)
                  \[\Delta H\] is of the order of 400 kJ done clear
  B)
                  Adsorption is irreversible done clear
  C)
                  Adsorption may be multimolecular layer done clear
  D)
                  Adsorption is specific done clear
  View Solution play_arrow

• question_answer35)
  The viscosity of the solvent depends on [Kerala (Med.) 2002]
  A)
                  Isothermic nature done clear
  B)
                  Solute - solute interaction done clear
  C)
                  Solute - solvent interaction done clear
  D)
                  Density of the liquid done clear
  View Solution play_arrow

• question_answer36)
  Which of the following kinds of catalysis can be explained by the adsorption theory?      [MP PET/PMT 1998]
  A)
                  Homogeneous catalysis done clear
  B)
                  Acid base catalysis done clear
  C)
                  Heterogeneous catalysis              done clear
  D)
                  Enzyme catalysis done clear
  View Solution play_arrow

• question_answer37)
  Adsorption due to strong chemical forces is called            [KCET (Med.) 2001]
  A)
                  Chemisorption  done clear
  B)
                  Physiosorption done clear
  C)
                  Reversible adsorption    done clear
  D)
                  Both B and C done clear
  View Solution play_arrow

• question_answer38)
  In neutralisation of KI by \[AgN{{O}_{3}}\] positive charge is due to absorption of                                             [AMU 2000] 
  A)
                  \[A{{g}^{+}}\] ions           done clear
  B)
                  Ag done clear
  C)
                  I ions     done clear
  D)
                  Both B and C done clear
  View Solution play_arrow

• question_answer39)
  Physical adsorption is inversely proportional to the          [AFMC 2000]
  A)
                  Volume                done clear
  B)
                  Concentration done clear
  C)
                  Temperature     done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer40)
  50 ml of 1 M oxalic acid is shaken with 0.5 gm of wood charcoal. The final concentration of the solution after adsorption is 0.5 M. Amount of oxalic acid absorbed per gm of charcoal is   [MP PET 2004]
  A)
                  3.45 gm                done clear
  B)
                  3.15 gm done clear
  C)
                  6.30 gm                done clear
  D)
                  None done clear
  View Solution play_arrow

• question_answer41)
  Noble gases are adsorbed by    [DCE 2004]
  A)
                  Anhydrous calcium chloride done clear
  B)
                  Ferric hydroxide done clear
  C)
                  Conc. \[{{H}_{2}}S{{O}_{4}}\] done clear
  D)
                  Activated coconut charcoal done clear
  View Solution play_arrow

• question_answer42)
  Animal charcoal is used in decolourising colour of liquids because it is a good                                       [MHCET 2004]
  A)
                  Adsorbate           done clear
  B)
                  Adsorbent done clear
  C)
                  Oxidising agent done clear
  D)
                  Reducing agent done clear
  View Solution play_arrow

• question_answer43)
  What will be the effect of increase in temperature on physical adsorption                                            [Pb. CET 2000]
  A)
                  It will decrease done clear
  B)
                  It will increase done clear
  C)
                  First increase then decrease done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer44)
  0.2 gm of fine animal charcoal is mixed with half litre of acetic acid solution and shaken for 30 minutes [DPMT 2004]
  A)
                  Concentration remains same done clear
  B)
                  Concentration increases done clear
  C)
                  Concentration of the solution decrease done clear
  D)
                  None of these done clear
  View Solution play_arrow

• question_answer45)
  The equation for Freundlich adsorption isotherm is [MHCET 2004]
  A)
                  \[\frac{x}{m}=k{{p}^{1/n}}\]       done clear
  B)
                  \[x=mk{{p}^{1/n}}\] done clear
  C)
                  \[x/m=k{{p}^{-n}}\]        done clear
  D)
                  All of these done clear
  View Solution play_arrow

• question_answer46)
  The extent of adsorption of a gas on a solid depends on [KCET 2005]
  A)
                  Nature of the gas             done clear
  B)
                  Pressure of the gas done clear
  C)
                  Temperature of the gas                done clear
  D)
                  All are correct done clear
  View Solution play_arrow

• question_answer47)
  Activated charcoal is used to remove coloring matter from pure substances. It works by                [KCET 2005]
  A)
                  Oxidation            done clear
  B)
                  Reduction done clear
  C)
                  Bleaching             done clear
  D)
                  Adsorption done clear
  View Solution play_arrow