Which characteristic of water causes adhesion?

Cohesion causes the development of another important characteristic of water – high surface tension. The tendency of water molecules to bond with one another requires a considerable amount of energy to break compared to other liquids. Similarly to cohesion, adhesion forms because of hydrogen bonding.

Which of the following bond interaction is not involved in adsorption?

7. Which of the following bond/interaction is not involved in adsorption? Explanation: Covalent bonding is not involved in adsorption as it is the strongest bond and adsorption proceeds with weaker bonds.

Which of the following can be an adsorbent?

Silica, alumina and cellulose can be used as adsorbent in adsorption chromatography.

Which of the following columns are not used in liquid or high performance liquid chromatography?

Which of the following columns are not used in liquid or high performance liquid chromatography? Explanation: Capillary column is used in gas chromatography. Analytical column is also known as a separation column.

Which of the following is an absorbent?

In column chromatography adsorbent is silica gel or alumina. In paper chromatography adsorbent is cellulose. Moisture / Water present in the pores of cellulose fibers present in filter paper acts as stationary phase & another mobile phase is used as solvent. Option D is correct.

Which of the following is commonly used adsorbent?

The two most common ones, alumina and silica gel, and several other adsorbents are listed in Table 23-1 according to adsorbing power.

Which of the following is not a matrix used for entrapment?

Glutaraldehyde is the matrix used for immobilization by covalent binding. 9. Entrapment of calcium alginate is not used in case of which of the following? Explanation: The method in which the enzyme is entrapped within suitable gel or fiber.

Which of the following is not a method of entrapment?

Explanation: Ionic bonding is not a method of immobilization. It is the transfer of electrons between the atoms. Whereas entrapment, adsorption, encapsulation, covalent bonding, and copolymerization are the methods of immobilization.

Which of the following is not an adsorbent?

1. Which of the following is not an adsorbent? Explanation: A sponge will absorb or take in water from another area and put it inside of itself. A dry sponge can hold more water than a wet sponge is closer to saturation and as such cannot hold more water.

Which of the following is not used as a adsorption material?

Answer: Deionized water is water that has all of its mineral ions removed, such as cations like sodium, calcium, and anions like chloride and sulfate. In this process, there is no adhesion or accumulation of adsorbate to the adsorbent. So deionization of water does not involve adsorption.

Which one of the following adsorbent is used in adsorption chromatography?

Alumina is the main type of polar and basic adsorbent that is used in adsorption chromatography. Like silica, alumina retains polar compounds, but alumina works especially well for polar acidic substances.

Which substance is used as adsorbent in chromatographic method?

The most commonly used adsorbent in column chromatography is Al2O3 and silica gel. Because these have high surface area and porous in nature such that they absorb substances onto the surface by inter-molecular forces.

Which type of bond must be broken for water to evaporate?

In order for water to evaporate, hydrogen bonds must be broken. Water’s heat of vaporization is 540 cal/g. In order for water to evaporate, each gram must GAIN 540 calories . This is a very high heat of vaporization for a little molecule.

Why are my bubbles not working?

Bubble notifications are only for certain apps. You need to enable it in the specific app notification settings as well as turn on from the general notifications settings. If it still does not work, try clearing cache of all the messenger apps you are facing this issue with.

Why can insects move on the surface of water without sinking?

The insect can move on the surface of water due to the surface tension of water. So option 3 is correct. The weight of the insect and structure of their feet in combination with the surface tension of water allows some insects to walk on water.

Why do alveoli not collapse?

Surfactant is released from the lung cells and spreads across the tissue that surrounds alveoli. This substance lowers surface tension, which keeps the alveoli from collapsing after exhalation and makes breathing easy.

Why do insects float on water?

Water molecules are more attracted to each other than they are to other materials, so they generate a force to stay together called surface tension. If the force that the insect foot makes on the water, is less than the surface tension of the water, the bug will float.

Why do insects not sink?

They take advantage of a property called surface tension to stay above the water and not sink. The force they exert downward is less than the forces exerted among the water molecules on the surface of the pond, so the insect does not penetrate beneath the surface of the water.

Why does a paper clip remain afloat on the liquid surface?

It seems to defy the laws of physics, but a paper clip made of steel can indeed float on the water surface. The high surface tension helps the paper clip – with much higher density – float on the water. The cohesive forces between liquid molecules are responsible for the phenomenon known as surface tension.

Why does a small piece of camphor dance about on the water surface?

The camphor slowly dissolves in the water lowering the water’s surface tension in the immediate neighbourhood. The strange pull exerted by the uncontaminated portion of water brings about a movement of the surface and the camphor particles are carried along with it.