Adsorbate and Adsorbent

Q.

Paper chromatography is a type of________?

Q.

How can negative adsorption be adsorption since here the particles are accumulated even in the bulk ?

Q.

Which gas is adsorbed in minimum amount by the activated charcoal?

Q.

With increase in surface area of adsorbent, chemical adsorption:

1. Decreases

2. First increases then decreases

3. Remain unchanged

4. Increases

Q.

Which is not true for physical adsorption?

1. Specific in nature

2. Multilayer

3. Low enthalpy of adsorption

4. Reversible in nature

Q. Powdered substances are more effective adsorbents than their crystalline form because:

1. adsorption is an exothermic process
2. they become inert and do not react with the absorbate
3. the extent of adsorption increases with increase in surface area of the adsorbent
4. adsorption is more if the size of adsorbent is small

Q.

_________ is used to separate complex mixtures such as colored dyes from ink.

Q. Why is adsorption always exothermic?

Q.

How to test for presence of Potassium and Sodium in Shampoo?
This is for a investigative project.

Q. Give the relationship between density and edge length of a cubic crystal

Q. Which of the following is true regarding absorption and adsorption?

1. In absorption, the substance is uniformly distributed throughout the bulk of the solid.
2. In absorption, the substance is concentrated only at the surface and does not penetrate through the surface.
3. In adsorption, the substance is concentrated only at the surface and does not penetrate through the surface.
4. (a) and (c) above.

Q.

In the gulabjamun experiment that you have seen, which do you think is the adsorbate and which is the adsorbent?

1. Jamun - adsorbent; sugar syrup - adsorbate

2. Jamun - adsorbate; sugar syrup - adsorbent

3. Both are adsorbents

4. Not applicable in this case

Q. Heat of adsorption is high for physical adsorption

1. True
2. False

Q. The properties of physical adsorption are:

1. Absorbate is held to the adsorbent by weak hydrogen bonds
2. As the temperature increases, adsorption decreases
3. A multilayer is possible
4. Adsorption is reversible
5. It is more specific

Q. The substance used as an adsorbent in the column chromatography is:

1. ${Na}_{2}O$
2. ${Na}_2{SO}_4$
3. ${Al}_2{O}_3$
4. alum

Q.
When we apply moisturizer on our skin, what kind of adsorption can we call it? Assume the moisturizer doesn't evaporate from the skin surface.

1. Positive desorption
2. Positive adsorption
3. Negative adsorption
4. Desorption

Q. Which of the following is true about acetic anhydride?

1. It is a colorless liquid with an irritating smell.
2. It is less reactive than acetyl chloride.
3. Both of the above
4. None of the above

Q. Let's take a piece of wood and put it in water and get it out after a minute. What kind of adsorption do you think would be at play here?

1. Positive adsorption
2. Negative adsorption
3. Desorption
4. None

Q. The edge length of rock salt type unit cell is 508 pm . If the radius of the cation is 110 pm , the ratio of the anion assumiing NaCl type struture is

Q. In adsorption, the substance which accumulates on the surface of the other substance is termed as:

1. adsorbent
   
2. adsorbate
   
3. accumulator
   
4. none

Q. A poisonous gas is adsorbed at activated charcoal. The activated charcoal is:

1. adsorbate
2. adsorbent
3. absorber
4. absorbate

Q.

In the adsorption of acetic acid on activated charcoal, the acetic acid is an [MP PET 1994; MP PMT

1. Adsorber

2. Absorber

3. Adsorbent

4. Adsorbate

Q.

What is chromatography?

Q.

Is tanning of skin a surface phenomena(adsorption) or bulk phenomena(absorption)?

Q. Name the adsorbent used to removal of colouring matter from solution.

Q.

1. True
2. False

Q.

Which type of phenomenon is used when coloured sugar solution is decolourized by charcoal?

1. Absorption

2. Adsorption

3. Both absorption and adsorption

4. None of the above

Q.

Vermioneand Larry were in a class.

Teacher said: Absorption is a bulk phenomenon where molecules are distributed in the bulk of a substance.
Larry: If I fill my bottle with water, it must be absorbing the water because it's in the bulk of the bottle.
Vermioneslapped Larry.

Why didVermioneslap Larry?

1. Because Larry was right.
2. Because the teacher was wrong.
3. Because Larry came up with an awesome conclusion
4. Because Larry made a stupid statement.

Q.

Give reason why a finely divided substance is more effective as an adsorbent.

Q.

Rohan wanted to separate a mixture of blue and red ink. His friend Akash suggested to use chromatography

Contextual Question: Define chromatography.

Value-Based Question: Which two values does Akash possess?