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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
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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
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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
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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
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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
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B)
Chemical adsorption done
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C)
Heat of adsorption done
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D)
Enthalpy of adsorption done
clear
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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
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question_answer7)
A solid acts as an adsorbent because it has
A)
A definite shape done
clear
B)
Small pores in it done
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C)
Unsaturated valencies done
clear
D)
A high lattice energy done
clear
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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
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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
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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
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C)
Gravitational forces done
clear
D)
Vander Waal's forces done
clear
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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
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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
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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
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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
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B)
Absorber done
clear
C)
Adsorbent done
clear
D)
Adsorbate done
clear
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question_answer15)
Sticking of one substance at the surface of another is called
A)
Absorption done
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B)
Chemisorption done
clear
C)
Adsorption done
clear
D)
Desorption done
clear
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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
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D)
None of these done
clear
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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
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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
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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
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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
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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
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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
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D)
None of these done
clear
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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
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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
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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
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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
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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
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question_answer28)
Adsorption is always [DPMT 2000]
A)
Endothermic done
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B)
Exothermic done
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C)
Either A or B done
clear
D)
None of these done
clear
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question_answer29)
The colloidal system consisting of a liquid adsorbent in a solid adsorbate is termed as
A)
Aerosol done
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B)
Sol done
clear
C)
Foam done
clear
D)
Gel done
clear
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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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
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