The catalyst used in the lead-chamber process of sulphuric acid is:

1. platinum

2. nitric oxide

3. nickel

4. vanadium pentoxide

Subtopic:  Catalyst |
From NCERT
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Medicines are more effective if they are used in:

1. Colloidal state

2. Solid-state

3. Solution state

4. None of the above 

Subtopic:  Colloidal Solution |
 89%
From NCERT
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Hydrolysis of maltose (C12H22O11) by maltase gives:

1. glucose                         

2. fructose

3. both 1 and 2         

4. none of these

Subtopic:  Catalyst |
 63%
From NCERT
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Hydrolysis of cane-sugar is catalysed by:

1. H+                         

2. mineral acids

3. enzymes                 

4. all of these

Subtopic:  Catalyst |
 62%
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Which is not shown by sols?

1. Adsorption

2. Tyndall effect

3. Flocculation

4. Paramagnetism

Subtopic:  Lyophilic & Lyophobic Sol |
 82%
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Detergent action of synthetic detergents is due to their:

1. interfacial area

2. high molar mass

3. ionization

4. emulsifying properties

Subtopic:  Emulsions |
 78%
From NCERT
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What does the name "aquadag" refer to?

1. Cu in water sol.

2. Pt in water sol.

3. Graphite in water sol.

4. None of the above.

Subtopic:  Colloidal Solution |
 60%
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What results are obtained from adding FeCl3 to K4[Fe(CN)6] in a diluted, cold solution?

1. Prussian blue sol.                     

2. Fe4[Fe(CN)6]3 sol.

3. Positive sol.                               

4. All of the above.

Subtopic:  Colloidal Solution |
 76%
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Which of the following electrolytes, Na2SO4, CaCl2, Al2(SO4)3, and NH4Cl, is the most effective coagulating agent for Sb2S3 sol?

1. Na2SO4                             

2. CaCl2

3. Al2(SO4)3                           

4. NH4Cl

Subtopic:  Colloidal Solution |
 86%
From NCERT
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Among the given options, which element is the minimum required for precipitation of a negatively charged suspension of clay in water?

1. Aluminium chloride.

2. Potassium sulphate.

3. Sodium hydroxide.

4. Hydrochloric acid.

Subtopic:  Colloidal Solution |
 67%
From NCERT
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