1.

    The coagulation values (in millimoles per litre) of the electrolytes used for the coagulation of {As}2{S}3\{\rm As\}_2\{\rm S\}_3 are given below:

    I) {NaCl}=52\{\rm NaCl\} = 52

    II) {BaCl2}=0.69\{\rm BaCl_2\} = 0.69

    III) {MgSO4}=0.22\{\rm MgSO_4\} = 0.22

    What is the correct order of their coagulating power?

    A

    NaCl > BaCl2 > MgSO4

    B

    MgSO4 > BaCl2 > NaCl

    C

    BaCl2 > NaCl > MgSO4

    D

    MgSO4 > NaCl > BaCl2

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    PYQ YEAR: 2016
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Surface Chemistry, Coagulation, Coagulation Value, Coagulating Power

    Related Questions

    1.

    Surface tension of lyophilic sols is :

    A

    Lower than H2O{{\rm{H}}_2}{\rm{O}}

    B

    More than H2O{{\rm{H}}_2}{\rm{O}}

    C

    Equal to H2O{{\rm{H}}_2}{\rm{O}}

    D

    None of these

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Surface Tension, Lyophilic Sols, Intermolecular Forces

    2.

    Soap removes grease by :

    A

    Adsorption

    B

    Emulsification

    C

    Coagulation

    D

    None of these

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Emulsification, Surfactants, Soap Chemistry

    3.

    Which will not form colloidal solution?

    (Where DP = Dispersion phase and DM = Dispersion medium)

    A

    DP-gas, DM-liq.

    B

    DP-liquid DM-solid

    C

    DP-gas, DM-gas

    D

    DP-solid, DM-solid

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :colloidal solutions, phases of matter, dispersion phase, dispersion medium

    4.

    Clouds, mist, fog and aerosols are colloidal solutions of :

    A

    Solid in a gas

    B

    Gas in a solid

    C

    Liquid in a gas

    D

    Gas in a liquid

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Colloidal solutions, phases of matter

    5.

    Choose the incorrect statement

    A

    If the mutual affinity between the dispersed phase and the dispersion medium is small, the system will be lyophobic

    B

    If the mutual affinity between the dispersed phase and dispersion medium is great, the system will be lyophilic

    C

    In a system, when water is the dispersion medium, the system may be hydrophobic or hydrophilic

    D

    Ionic surfactant molecules cluster together in clumps

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Understanding
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :colloids, lyophobic, lyophilic, hydrophobic, hydrophilic, surfactants

    6.

    Whenever, gels are placed with their dispersed phase, they :

    A

    Swells up

    B

    Show intake of the dispersed phase

    C

    Develops imbibition

    D

    All of the above

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :gels, dispersed phase, swelling, imbibition

    7.

    The gold number of gelatin, haemoglobin and sodium acetate are 0.005, 0.05 and 0.7 respectively. The protective actions will be in order

    A

    Gelatin <haemoglobin< sodium acetate

    B

    Gelatin >haemoglobin> sodium acetate

    C

    Haemoglobin> gelatin > sodium acetate

    D

    Sodium acetate > gelatin >haemoglobin

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Understanding
    🎯Difficulty :Easy
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :gold number, protective action of colloids

    8.

    Lyophobic colloids are :

    A

    Reversible colloids

    B

    Irreversible colloids

    C

    Protective colloids

    D

    Gum, proteins

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :Lyophobic colloids, Reversible colloids, Irreversible colloids, Colloid types

    9.

    Fog is a colloidal solution of

    A

    Liquid particles dispersed in gas

    B

    Gaseous particles dispersed in a liquid

    C

    Solid particles dispersed in liquid

    D

    Solid particles dispersed in gas

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Remembering
    🎯Difficulty :Easy
    ⚡ Time Required :1 mins
    🔄Ncert Concepts :colloids, states of matter, dispersion

    10.

    An example of micelle is

    A

    AS2O3A{S_2}{O_3} sol

    B

    Ruby glass

    C

    Na2CO3N{a_2}C{O_3} solution

    D

    Sodium stearate concentrated solution

    Question Tags
    📚 Subject:Chemistry
    📑 Chapter:Surface Chemistry
    🎯Topic:Colloidal State
    🎓 Ncert Level:Remembering
    🎯Difficulty :Medium
    ⚡ Time Required :2 mins
    🔄Ncert Concepts :Micelles, Colloids, Solutions

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