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question_answer1)
Which of the following is contributed towards the extra stability of lyophilic colloids [CPMT 1983]
A)
Hydration done
clear
B)
Charge done
clear
C)
Colour done
clear
D)
Tyndall effect done
clear
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question_answer2)
Which of the following methods is used for sol destruction [CPMT 1988]
A)
Condensation done
clear
B)
Dialysis done
clear
C)
Diffusion through animal membrane done
clear
D)
Addition of an electrolyte done
clear
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question_answer3)
A catalyst is a substance which [IIT 1983]
A)
Increases the equilibrium concentration of the product done
clear
B)
Changes the equilibrium constant of the reaction done
clear
C)
Shortens the time to reach equilibrium done
clear
D)
Supplies energy to the reaction done
clear
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question_answer4)
The decomposition of hydrogen peroxide can be slowed by the addition of a small amount of acetamide. The latter acts as a [MNR 1978]
A)
Detainer done
clear
B)
Stopper done
clear
C)
Promoter done
clear
D)
Inhibitor done
clear
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question_answer5)
The ability of an ion to bring about coagulation of a given colloid depends upon [CPMT 1980; MP PET/PMT 1988; CBSE PMT 1997; MP PMT 1989; MP PET 1994]
A)
Its size done
clear
B)
The magnitude of its charge only done
clear
C)
The sign of its charge done
clear
D)
Both the magnitude and the sign of its charge done
clear
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question_answer6)
Which one of the following is an incorrect statement for physisorption [MP PET 2002]
A)
It is a reversible process done
clear
B)
It requires less heat of adsorption done
clear
C)
It requires activation energy done
clear
D)
It takes place at low temperature done
clear
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question_answer7)
Which is not colloidal [CPMT 1984; MP PET 1989, 91]
A)
Chlorophyll done
clear
B)
Egg done
clear
C)
Ruby glass done
clear
D)
Milk done
clear
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question_answer8)
Which one of the following is not a surfactant [AIIMS 2003]
A)
\[C{{H}_{3}}-{{(C{{H}_{2}})}_{15}}-\underset{C{{H}_{3}}}{\overset{C{{H}_{3}}}{\mathop{\underset{|\,\,\,\,\,\,\,\,\,\,\,}{\overset{|\,\,\,\,\,\,\,\,\,\,\,\,}{\mathop{{{N}^{+}}-}}}\,}}}\,C{{H}_{3}}B{{r}^{-}}\] done
clear
B)
\[C{{H}_{3}}-{{(C{{H}_{2}})}_{14}}-C{{H}_{2}}-N{{H}_{2}}\] done
clear
C)
\[C{{H}_{3}}-{{(C{{H}_{2}})}_{16}}-C{{H}_{2}}OSO_{2}^{-}N{{a}^{+}}\] done
clear
D)
\[OHC-{{(C{{H}_{2}})}_{14}}-C{{H}_{2}}-CO{{O}^{-}}N{{a}^{+}}\] done
clear
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question_answer9)
Size of colloidal particles is [CPMT 1984; MP PMT 1990, 92]
A)
\[0.1\,m\,\mu \] to \[0.001\,m\,\mu \] done
clear
B)
\[10\,\mu \] to \[20\,\mu \] done
clear
C)
\[0.05\,m\,\mu \] to \[0.1\,m\,\mu \] done
clear
D)
\[25\,\mu \] to \[30\,\mu \] done
clear
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question_answer10)
Which of the following electrolytes is most effective in the coagulation of gold solution [KCET 1996]
A)
\[NaN{{O}_{3}}\] done
clear
B)
\[{{K}_{4}}[Fe{{(CN)}_{6}}]\] done
clear
C)
\[N{{a}_{3}}P{{O}_{4}}\] done
clear
D)
\[MgC{{l}_{2}}\] done
clear
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question_answer11)
A catalyst is used in a reaction to [CPMT 1972, 75, 97; DPMT 1982]
A)
Change the nature of reaction products done
clear
B)
Increase the reaction yield done
clear
C)
Decrease the need for reactants done
clear
D)
Decrease the time required for the reaction done
clear
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question_answer12)
Which one of the following is not represented by sols [MP PMT 1992]
A)
Absorption done
clear
B)
Tyndall effect done
clear
C)
Flocculation done
clear
D)
Paramagnetism done
clear
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question_answer13)
Example of intrinsic colloid is
A)
Glue done
clear
B)
Sulphur done
clear
C)
\[Fe\] done
clear
D)
\[A{{s}_{2}}{{S}_{3}}\] done
clear
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question_answer14)
Colloidal solution of arsenious sulphide can be prepared by [AMU 1985]
A)
Electrodispersion method done
clear
B)
Peptization done
clear
C)
Double decomposition done
clear
D)
Hydrolysis] done
clear
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question_answer15)
The capacity to bring about coagulation increases with
A)
Ionic radii done
clear
B)
Atomic radii done
clear
C)
Valency of an ion done
clear
D)
Size of an ion done
clear
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question_answer16)
Gold number gives [NCERT 1987; MNR 1987; UPSEAT 2002; Kurukshetra CET 2002; MP PMT 2004]
A)
The amount of gold present in the colloid done
clear
B)
The amount of gold required to break the colloid done
clear
C)
The amount of gold required to protect the colloid done
clear
D)
None of these done
clear
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question_answer17)
Point out the false statement [MP PET 1997]
A)
Brownian movement and Tyndall effect is shown by colloidal systems done
clear
B)
Gold number is a measure of the protective power of a lyophilic colloid done
clear
C)
The colloidal solution of a liquid in liquid is called is gel done
clear
D)
Hardy?Schulze rule is related with coagulation done
clear
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question_answer18)
Which of the following does not contain a hydrophobic structure [NCERT 1983]
A)
Linseed oil done
clear
B)
Lanolin done
clear
C)
Glycogen done
clear
D)
Rubber done
clear
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question_answer19)
The function of gum-arabic in the preparation of indian ink is
A)
Coagulation done
clear
B)
Peptization done
clear
C)
Protective action done
clear
D)
Absorption done
clear
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question_answer20)
Identify the gas which is readily adsorbed by activated charcol [KCET 2004]
A)
\[{{N}_{2}}\] done
clear
B)
\[S{{O}_{2}}\] done
clear
C)
\[{{H}_{2}}\] done
clear
D)
\[{{O}_{2}}\] done
clear
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question_answer21)
The density of gold is \[19\ g/c{{m}^{3}}\]. If \[1.9\times {{10}^{-4}}g\]of gold is dispersed in one litre of water to give a sol having spherical gold particles of radius 10 nm, then the number of gold particles per \[m{{m}^{3}}\] of the sol will be [Pb.CET 2004]
A)
\[1.9\times {{10}^{12}}\] done
clear
B)
\[6.3\times {{10}^{14}}\] done
clear
C)
\[6.3\times {{10}^{10}}\] done
clear
D)
\[2.4\times {{10}^{6}}\] done
clear
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question_answer22)
Which of the following forms cationic miscelles above certain concentration [CBSE PMT 2004]
A)
Urea done
clear
B)
Cetyltrimethylammonium bromide done
clear
C)
Sodium dodecyl sulphate done
clear
D)
Sodium acetate done
clear
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