Tag: adsorption and colloids

Questions Related to adsorption and colloids

Which of the following is NOT used in making photographic plates using colloidal sols?

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. Silver bromide

  2. Gelatin

  3. Glass plate

  4. Argyrol

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Correct Option: D
Explanation:

Argyrol is a silver sol and is used as an eye lotion. Silver bromide, gelatin and glass plate are used in the making photographic plates.

Colloidal sols are more effective for medical purposes because:

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. they have smaller surface area

  2. they have larger surface area

  3. their assimilation is difficult

  4. they can be easily prepared

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Correct Option: B
Explanation:

Colloidal sols have larger surface area which provides larger sites for reactions.So,they are more effective for medical purposes.

Delta formation at the mouth of river takes place by:

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. coagulation of negative salt ions and positive river particles

  2. coagulation of positive salt ions and negative river particles

  3. coagulation of positive salt ions and positive river particles

  4. coagulation of negative salt ions and negative river particles

Show answer
Correct Option: B
Explanation:

River water contains charged colloidal particles of clay, sand and many other materials. Sea water is very big store house of a variety of electrolytes dissolved in it. As soon as river water comes in contact with sea water coagulate the suspended colloidal particles which ultimately settle down at the point of contact. Thus the level of the river bed rises. As a result, water adopts a different course and delta is formed in due course of time.

Which of the following are adsorption indicators?

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. fluorescin

  2. methelene blue

  3. eosin

  4. both $A$ and $B$

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Correct Option: D
Explanation:

Both fluorescin and methelene blue are adsorption indicator. Both are used to show the adsorption had been taken place.

The colloidal sol found effective in the treatment of eye disease is:

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. colloidal sulphur

  2. colloidal antimony

  3. colloidal silver

  4. colloidal gold

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Correct Option: C
Explanation:

Colloidal silver has also been said to help prevent eye infections in infants when colloidal silver eye drops are used. It is also used for medical purposes including as disinfectants and microbiocides. Silver has also been added to bandages and dressings, and to the coating of medical instruments.

The colloidal solution of $X$ in gelatin is applied in glass plates to form sensitive plates in photography. Identify $X$:

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. Silver chloride

  2. Silver bromide

  3. Sodium chloride

  4. Sodium bromide

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Correct Option: B
Explanation:

$AgBr$ (Silver bromide) is used in photography. The colloidal solution of it in gelatin is applied in glass plates to form sensitive plates.

Smoke particles are actually electrically charged colloidal particles of :

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. carbon in air

  2. water droplets in air

  3. sulphur in air

  4. titanium oxide in air

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Correct Option: A
Explanation:

Smoke particles are electrically charged colloidal particles of carbon in the air.

What is the use of colloidal copper ?

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. In treatment of cancer

  2. In treatment of syphilis

  3. Diagnostic agent for paresis

  4. None of these

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Correct Option: A
Explanation:
Colloidal metal supplements are used to treat deficiencies of metals in the body and boost its immune system. Colloidal copper is actually small flecks of copper mixed with purified water. The water acts as a vehicle for delivering the metal to the digestive system.
Copper acts as an excellent anti-oxidant which helps prevents and treats diseases like.- diabetes and some cases claims, also prevents cancer., Proper Growth and Health, Copper is vital for good health and normal growth. It helps in the protection of skeletal, nervous and cardiovascular systems.

Which of the following is absorbed efficiently in colloidal forms?

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. Colloidal sulphur

  2. Colloidal gold

  3. Colloidal copper

  4. Colloidal mercury

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Correct Option: A
Explanation:

Colloidal sulfur is a suspension of fine sulfur particles, usually in a gum base. A good way to think about this is if one were to grind up pure sulfur and dust it into a gelatin mix before it firmed up. Colloidal sulfur is a homoeopathic 'natural' remedy used to treat skin conditions such as acne, psoriasis, eczema, and dermatitis. Colloidal sulfur can be taken orally or mixed with other ingredients and used as soap or shampoo.

Sulfur is lighter weight element and can serve as a powerful antioxidant, removing free radicals of oxygen and fluorine. Overall, colloidal sulfur is a safe substance that has been used throughout human history as a treatment for skin conditions and can be used today as an effective diet supplement.

Soap solution is colloidal in nature and remove the dust particles by which of the following process?

chemistry adsorption and colloids applications of colloids colloids around us the colloidal state

  1. Emulsification

  2. Adsorbtion

  3. Stripping

  4. Distillation

Show answer
Correct Option: A,B
Explanation:

Soap solution removes dust particles through emulsification and absorption of them.