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JEE Main Surface Chemistry — practice questions

Explore 30 free Surface Chemistry questions in JEE Main Chemistry. Open each question or exercise to read its content, reference answers and available explanation.

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Surface Chemistry questions and exercises with answers

Showing questions 1–30 of 30.

Molecules gathering at a surface rather than in the bulk is:Read the answer and worked solution →The substance that gathers on the surface is the:Read the answer and worked solution →The material on whose surface adsorption happens is the:Read the answer and worked solution →Adsorption is essentially a phenomenon of the:Read the answer and worked solution →Finely divided solids make good adsorbents because they have large:Read the answer and worked solution →Charcoal shaken with a dye solution leaves the filtrate:Read the answer and worked solution →Air is dried by silica gel because water molecules are:Read the answer and worked solution →Removing an adsorbed substance from a surface is called:Read the answer and worked solution →In absorption, against adsorption, the substance is spread:Read the answer and worked solution →A chalk stick dipped in ink keeps ink colour on its surface by:Read the answer and worked solution →The single term covering both adsorption and absorption is:Read the answer and worked solution →Water vapour is absorbed by anhydrous calcium chloride but:Read the answer and worked solution →Adsorption happens because surface particles carry forces that are:Read the answer and worked solution →Adsorption releases heat, so the process is always:Read the answer and worked solution →A gas losing freedom of movement on adsorption shows a fall in:Read the answer and worked solution →Adsorption held by weak van der Waals forces is called:Read the answer and worked solution →Adsorption held by chemical bonds is called:Read the answer and worked solution →Chemisorption needs a high energy of activation, so it is also called:Read the answer and worked solution →Physisorption shows no preference for a particular gas, so it lacks:Read the answer and worked solution →Physical adsorption of a gas by a solid is generally:Read the answer and worked solution →Chemisorption involves compound formation, so it is usually:Read the answer and worked solution →Gases that are easily liquefied are adsorbed:Read the answer and worked solution →True or false on adsorptionRead the answer and worked solution →Quick picks on surface chemistryRead the answer and worked solution →Physisorption or chemisorptionRead the answer and worked solution →Adsorbed or absorbedRead the answer and worked solution →Match each term to its meaningRead the answer and worked solution →Why adsorption gives out heatRead the answer and worked solution →Fill the gaps on adsorptionRead the answer and worked solution →Spot the one that does not fitRead the answer and worked solution →

Worked practice questions

Molecules gathering at a surface rather than in the bulk is:

  1. Adsorption
  2. Absorption
  3. Desorption
  4. Dissolution
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Correct answer: A. Adsorption

1. The species collects on the surface and goes no deeper. 2. That accumulation at the surface has its own name. 3. It is called adsorption. _Source: syllabus Chemistry Part I, Chapter 5, Surface Chemistry._

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The substance that gathers on the surface is the:

  1. Colloid
  2. Adsorbate
  3. Adsorbent
  4. Catalyst
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Correct answer: B. Adsorbate

1. Two names are needed, one for each partner. 2. The species that concentrates at the surface is the adsorbate. 3. The solid it settles on is the adsorbent. _Source: syllabus Chemistry Part I, Chapter 5, Surface Chemistry._

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The material on whose surface adsorption happens is the:

  1. Adsorbent
  2. Adsorbate
  3. Catalyst
  4. Colloid
Show answer and solution

Correct answer: A. Adsorbent

1. The adsorbate is the species that gathers. 2. The other partner provides the surface. 3. That material is called the adsorbent. _Source: syllabus Chemistry Part I, Chapter 5, Surface Chemistry._

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