Medicines are more effective if they are used in:

(1) Colloidal state

(2) Solid state

(3) Solution state

(4) None of these

Subtopic:  Colloidal Solution |
 90%
From NCERT
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Which is not shown by sols?

(a)Adsorption

(b)Tyndall effect

(c)Flocculation

(d)Paramagnetism

Subtopic:  Lyophilic & Lyophobic Sol |
 84%
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Detergent action of synthetic detergents is due to their:

(1) Interfacial area

(2) High molar mass

(3) Ionisation

(4) Emulsifying properties

Subtopic:  Emulsions |
 82%
From NCERT
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A negatively charged suspension of clay in water needs for precipitation the minimum amount of:

(a) aluminium chloride

(b)potassium sulphate

(c)sodium hydroxide

(d)hydrochloric acid

Subtopic:  Colloidal Solution |
 66%
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The arsenious sulphide sol has negative charge. The maximum coagulationg power for precipitating it is of :

(1) 0.1 N Zn(NO3)2

(2) 0.1 N Na3PO4

(3) 0.1 N ZnSO2

(4) 0.1 N AlCl3

Subtopic:  Colloidal Solution |
 72%
From NCERT
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An emulsifier is a substance which:

(1) Homogenesis the emulsion

(2) Stabliizes the emulsion

(3) Retards the dispersion of liquid in liquid

(4) Coagulates the emulsion

Subtopic:  Emulsions |
 78%
From NCERT
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Flocculation value is expressed in terms of:

(a) millimole per litre

(b) mole per litre

(c) gram per litre

(d) mole per millilitre

Subtopic:  Colloidal Solution |
 84%
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Which is an emulsifier?

(1) Soap

(2) Oil

(3) NaCl

(4) Water

Subtopic:  Emulsions |
 72%
From NCERT
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The capacity of an ion to coagulate a colloidal solution depends on:

(1) It's shape

(2) Amount of its charge

(3) The sign of charge

(4) Both amount and sign of the charge

Subtopic:  Colloidal Solution |
 85%
From NCERT
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Lyophobic collloids are:

(1)reversible colloids

(2)irreversible colloids

(3)protective colloids

(4)gum, proteins

Subtopic:  Lyophilic & Lyophobic Sol |
 77%
From NCERT
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