Surface chemistry

MCQ on Surface Chemistry

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Here Important Question on Surface Chemistry for all Board Exam CBSE HBSE RBSE and other Chemistry Exam like NEET, IIT Chemistry question on Surface Chemistry.Important MCQ on Surface Chemistry NEET, Surface Chemistry JEE and Surface Chemistry Board exam

MCQ on Topic Adsorption Surface Chemistry

[ays_quiz id=’5′]

Q.Activated charcoal is used to remove colouring matter from pure substance. it works by

  1. Oxidation
  2. reduction
  3. Bleaching
  4. Adsorption

Q.In adsorption, rate of physisorption increases when-

  1. Temperature is decreased
  2. Temperature is increased
  3. Pressure is decreased
  4. None of these

Q.Wood charcoal is used to decolorize sugar because it

  1. Adsorbs coloured material
  2. Absorbs decolorized material
  3.  Reduces coloured material
  4. none of these

Q.When temperature is raised, the viscosity of liquid decreases, this is because

  1. Decreased volume of the solution
  2. Decreased Covalent and hydrogen bond
  3. Increased attraction between molecules
  4. Decreased attraction between molecules

Q.A solid act as adsorbent because it has

  1. a definite shape
  2. small pores in it
  3. unsaturated valencies
  4. a high lattice energy

Q. When temperature is lowered and pressure is raised, the adsorption of a gas on a solid

  1. Decreases
  2. increases
  3. remain unaffected
  4. decreases first then increases

Q.In adsorption of oxalic acid on activated charcoal, the activated charcoal is known as

  1. Adsorbent
  2. Absorbent
  3. Absorber
  4. Adsorber

Q.Which of the following statement is not applicable to Chemisorption

  1. it is slow
  2. it is highly specific
  3. it is irreversible
  4. it is independent of temperature

Q.Physical adsorption is inversely proportional to the

  1. Volume
  2. Concentration
  3. Temperature
  4. All of these

Q. Which one in the following is incorrect statement

  1. Adsorption is a surface phenomena
  2. Adsorption is an endothermic process
  3. Absorption is an endothermic process
  4. Adsorption occurs at interface

Q.Which one is incorrect about physisorption

  1. exothermic process
  2. Reversible process
  3. High enthalpy of adsorption
  4. Multilayered system

Q.Which one is right statement about chemisorption

  1. Low value of enthalpy
  2. Vander Waal force present
  3. It involve adsorption of gases
  4. It is irreversible process

Q.Adsorption of gas on solid favors

  1. Low temperature
  2. High pressure
  3. Large surface area
  4. All

Q.Graph plotted between amount of adsorption and temperature is called

  1. Sorption
  2. Desorption
  3. Isotherm
  4. Isobar

Q.Which of the following is incorrect regarding physisorption?

  1. It occurs by van der Waal force
  2. More easily liquefiable gases are adsorbed easily
  3. It form multilayer on adsorbent
  4. Enthalpy of adsorption is low and positive

Q.0.2 gm of fine animal charcoal is mixed with half litre of acetic acid solution and shaken for 30 minutes.

  1. concentration remain same
  2. concentration increases
  3. concentration decreases
  4. none of these

Q.in Freundlich adsorption isotherm, the value of 1/n is

  1. between 0 and 1
  2. between 2 and 4
  3. 1 in case of physisorption
  4. 1 in case of chemisorption

Q.A plot of log x/m versus log P for the adsorption of gas gives straight line and slope is –

  1. 1/n
  2. Log k
  3. –log k
  4. None

Q.Which one is used for the removal of moisture from air

  1. Activated charcoal
  2. Solid alumina
  3. Silica gel
  4. Coconut charcoal

Q.Which one is used in gas mask to adsorb poisonous gases in coal mines?

  1. Activated charcoal
  2. Solid alumina
  3. Silica gel
  4. Coconut charcoal

Q.Which one is not an example of adsorption

  1. Hydrogen gas on platinum
  2. Heterogeneous catalysis
  3. Homogeneous catalysis
  4. Decolourisation of solution

MCQ on topic Catalysis Surface Chemistry

[ays_quiz id=’6′]

Q.Who gave term catalyst?

  1. Robert brown
  2. Tyndal
  3. Berzelius
  4. None

Q.What is the catalyst of following reaction

                2KClO3  →          2KCl + 3O2

  1. Fe
  2. Ni
  3. Pt
  4. MnO2

Q.Glycerol in the given reaction 2H2O2     →     2H2O   +  O2  act as-

  1. Positive catalyst
  2. Negative catalyst
  3. Auto catalyst
  4. Induced catalyst

Q.Which one is used as catalyst in the formation of ammonia

  1. Molybdenum
  2. Iron
  3. Nickel
  4. Palladium

Q. A catalyst is used

  1. only for increasing the velocity the reaction
  2. for altering the velocity of the reaction
  3. only for decreasing the velocity the reaction
  4. All are correct

Q. Which one is not correct about catalyst

  1. Required in low amount
  2. Start the reaction
  3. Lower the activation energy
  4. None of these

Q. Shape selective catalysis can be carried by

  1. Zeolite
  2. ZSM-5
  3. Sodium Zeolite
  4. All

Q. Main function of ZSM-5 is

  1. Softening of water
  2. Decolourisation of water
  3. Conversion of ethyl alcohol to petrol
  4. None of these

Q. When a catalyst is added to a system then

  1. value of equilibrium constant is decreased
  2. The rate of forward reaction is increased and that of backward reaction is decreased
  3. Equilibrium concentrations are unchanged
  4. Equilibrium concentration increases

Q. Which one of the following statement is correct in reversible reaction? A catalyst

  1. increases the rate of forward reaction
  2. decreases the rate of backward reaction
  3. increases the rate of forward reaction and backward reaction
  4. alter the equilibrium reaction

Q. The catalyst used in the lead chamber process of sulphuric acid manufacture is

  1. Platinum
  2. Oxide of nitrogen
  3. Nickel
  4. Vanadium compound

Q. What is the role of catalyst in a catalysed reaction

  1. lowers the activation energy
  2. increases the activation energy
  3. affects the free energy change
  4. affects the enthalpy change

Q. An example of auto catalysis is

  1. oxidation of NO to NO2
  2. oxidation of SO2 to SO3
  3. decomposition of KClO3 to KCl & O2
  4. oxidation of oxalic acid by acidified KMnO4

Q. Ziegler –Natta catalyst is used in

  1. Contact process
  2. Haber process
  3. Polymerisation of alkene
  4. Hydrogenation of alkene

Q. According to Adsorption theory, the speed of reaction increases because

  1. Adsorption lowers the activation energy
  2. the concentration of reactant molecule becomes high due to adsorption
  3. Adsorption increases the activation energy
  4. Adsorption produces heat which increases the speed of reaction

Q. Catalyst –( TiCl4  + Al(C2 H5)3 ) is known as

  1. Ziegler-Natta
  2. Radical
  3. Promoter
  4. Inhibitor

Q. Catalyst –( RhCl(PPH3)2 ) is used in  

  1. Hydrogenation reaction
  2. Polymerisation reaction
  3. Aromatization reaction
  4. None of these

Q. Which one is used as catalyst in the formation of toluene from Benzene with CH3Cl.

  1. Ni
  2. Pt
  3. Pd
  4. anhydrous AlCl3

Q. Platinized asbestos is used as catalyst in the manufacture of H2SO4. It is an example of

  1. Heterogeneous catalyst
  2. Homogeneous catalyst
  3. Autocatalyst
  4. Induced catalyst

Q. In the Ostwald’s process for the manufacture of HNO3, the catalyst used is

  1. Mo
  2. Fe
  3. Pt
  4. Ni

Q. The transition metal used as catalyst is

  1. Nickel
  2. Cobalt
  3. platinum
  4. All of these

Q. which of the following types of metals form most efficient catalysts

  1. Alkali metals
  2. Alkaline earth metals
  3. Transition metals
  4. All of these

Q. In petrochemical industries, alcohol is directly converted in to gasoline by passing  over heated

  1. Platinum
  2. ZSM-5
  3. Palladium
  4. Nickel

Q. A catalyst remain unchanged at the end of reaction regarding

  1. Mass
  2. Physical state
  3. Physical state and chemical composition
  4. Mass and chemical composition

Q. for the study of catalytic reaction, who was awarded Noble prize

  1. Ostwald
  2. Berzelius
  3. Vant Hoff
  4. Werner

Q. Proton accelerates the hydrolysis of ester. this is an example of

  1. A heterogeneous catalysis
  2. An acid-base catalysis
  3. Negative catalysis
  4. Promoter

MCQ on Enzyme Catalysis Surface Chemistry

Q.Which enzyme is used in the hydrolysis of sucrose

  1. Zymase
  2. Diastase
  3. Invertase
  4. Pepsin

Q.Which one is not correct about catalyst

  1. Required in low amount
  2. Start the reaction
  3. Lower the activation energy
  4. None

Q.Which one is not correct about enzyme

  1. They are biocatalyst
  2. Fast the biochemical reaction
  3. Do not consume in the reaction
  4. None

Q.Which one is  common between catalyst and enzyme

  1. Both fast the reaction
  2. Both require in very small amount
  3. Both are specific and highly efficient in nature
  4. All

Q.Shape selective catalysis can be carried by

  1. Zeolite
  2. ZSM-5
  3. Sodium Zeolite
  4. All

Q. Main function of ZSM-5 is

  1. Softening of water
  2. Decolourisation of water
  3. Conversion of ethyl alcohol to petrol
  4. None

MCQ on Colloids Surface Chemistry

[ays_quiz id=’7′]

Q.Which one is example of crystalloid

  1. NaCl
  2. Starch
  3. Gum
  4. Honey

Q.Brownian movement is not shown by

  1. Starch solution
  2. Gold sol
  3. Soap solution
  4. Salt solution

Q.Colloidal particle can be visible with

  1. Colloidal microscope
  2. Naked eye
  3. Microscope
  4. Telescope

Q.Colloidal particle are not settled down due to

  1. Movement of dispersion medium
  2. Movement of dispersed phase
  3. Bombardment of DP with DM molecule
  4. All

Q.Which one is not true about colloid

  1. Homogeneous mixture
  2. Solute called dispersed phase
  3. Show tyndall effect
  4. Colloid carry charge

Q.Which type of molecule form micelle

  1. Polar molecules
  2. Non polar molecules
  3. Surfactant molecules
  4. None

Q.Example of micelle is

  1. Ruby glass
  2. Na2CO3 solution
  3. Solution of sodium stearate

Q.Brownian movement is a — property

  1. Optical property
  2. Electrical property
  3. Kinetic property
  4. Colligative property

Q.Which do not show tyndall effect

  1. Emulsion
  2. Blood
  3. Milk
  4. Sugar solution

Q.Fog is colloid solution of

  1. Liquid in gas
  2. Gas in liquid
  3. Solid in liquid
  4. Solid in gas

Q.The stability of Lyophobic colloid is due to

  1. A layer of dispersion medium on their particle
  2. Charge on particle
  3. Large size of their particle
  4. Smaller size of their particle

Q.Movement of DM toward opposite electrode when dispersed phase particles are not allowed to move. This phenomena is—

  1. Electrophoresis
  2. Cataphoresis
  3. Electro-osmosis
  4. Brownian motion

Q.Bleeding due to cut can be stopped by applying ferric chloride solution. This is due to  —

  1. Blood flow in opposite direction
  2. Common iron is present in both haemoglobin and FeCl3
  3. Ferric ion for complex with haemoglobin
  4. Coagulation negative charged blood by ferric ion occurs

Q.Emulsifier in milk is

  1. Fat
  2. Water
  3. Casein
  4. Mg ion

Q.Gelatin is mostly used in making ice cream in order to-

  1. Prevent making of colloid
  2. Stabilize the mixture
  3. Stabilize the colloid and prevent crystallization
  4. None

Q.Reason of formation of delta in sea

  1. Peptisation
  2. Coagulation
  3. Hydrolysis
  4. Dialysis

Q.Formation of micelle occurs after a fix temperature. This temperature is called

  1. Critical temperature
  2. Critical sol temperature
  3. Consolute temperature
  4. Kraft temperature

Q.Protective sols are

  1. Lyophilic
  2. Lyophobic
  3. Both
  4. Gelatin

Q.Which one is not a colloidal system

  1. Smoke
  2. Ink
  3. Blood
  4. Air

Q.Which is used to coagulate colloidal solution

  1. Electrons
  2. Electrolyte
  3. Positive charged ions
  4. Compound

Q.Alum is a water purifier because it

  1. Coagulate the impurities
  2. Soften hard water
  3. Gives taste
  4. Destroy the pathogenic bacteria

Q.The amount of protective colloid is expressed in

  1. CMC
  2. Kraft value
  3. Gold number
  4. Minimum electrolyte

Q.Which one of the following does not involve coagulation

  1. Peptisation
  2. Formation of delta
  3. Treatment of drinking water by potash alum
  4. Clotting of blood by the use of ferric chloride

Q. The simplest way to check weather a system is colloidal or not :

  1. Tyndall effect
  2. Brownian motion
  3. Electrodialysis
  4. Finding out particle size 

Q. Gold sol can be obtained by

  1. Exchange method
  2. Peptisation
  3. Bredig’s arc method
  4. Oxidation

Q.

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