Arihant All in One Chemistry Class 11. We covered all the Arihant All in One Chemistry Class 11 MCQs in this post for free so that you can practice well for the exam.
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Arihant All in One Chemistry Class 11 Objective for Students
JJ Thomson’s proposed model of an atom is generally called:
(a) Cream and cake
(b) Plum and pudding
(c) Plum and cake
(d) Cream and pudding
Option b – Plum and pudding
Nucleons are regarded as composite sub-particles known as ( Arihant All in One Chemistry Class 11 MCQ )
(a) Mesons
(b) Quarks
(c) Leptons
(d) Photons
Option b – Quarks
Which one of the following pairs constitutes a particle-antiparticle pair?
(a) Electron – Positron
(b) Proton – Neutron
(c) Photon – Electron
(d) Neutron – Neutrino
Option a – Electron – Positron
Charge on a proton is equal to the charge on ( Arihant All in One Chemistry Class 11 MCQ )
(a) Electron
(b) Positron
(c) Neutron
(d) Alpha particle
Option b – Positron
In a pressure cooker, cooking is fast because of the increase in vapor pressure:
(a) Increases the specific heat.
(b) Decreases the specific heat.
(c) Decreases the boiling point.
(d) Increases the boiling point.
Option d – Increases the boiling point
When ammonium chloride is dissolved in water, the solution becomes cold. The change is ( Arihant All in One Chemistry Class 11 MCQ )
(a) Endothermic.
(b) Exothermic.
(c) Supercooling.
(d) None of these.
Option c – Supercooling
The entropy of a perfectly crystalline solid at absolute zero is:
(a) Positive.
(b) Negative.
(c) Zero.
(d) Not definite.
Option c – Zero
Among the following, respiration is which type of process? ( Arihant All in One Chemistry Class 11 MCQ )
(a) Exothermic process.
(b) Endothermic process.
(c) Both exothermic and endothermic.
(d) Neither exothermic nor endothermic.
Option a – Exothermic process
Which of the following reactions is an example of an exothermic reaction?
(a) Burning of natural gas.
(b) Respiration.
(c) The decomposition of vegetable matter into compost.
(d) All options are correct.
Option d – All options are correct
What is an endothermic reaction? ( Arihant All in One Chemistry Class 11 MCQ )
(a) Reaction in which heat is released.
(b) Reaction in which heat is absorbed.
(c) Reaction in which neither heat is released nor absorbed.
(d) None of the above.
Option b – Reaction in which heat is absorbed
If a reaction is carried out at constant pressure, which of the following statements is correct?
(a) The reaction is likely to be endothermic.
(b) The heat change is equal to the enthalpy change.
(c) The reaction is likely to be exothermic.
(d) The heat change is equal to the change in temperature.
Option b – The heat change is equal to the enthalpy change
Which of the following is a characteristic of an exothermic reaction? ( Arihant All in One Chemistry Class 11 MCQ )
(a) Release of heat.
(b) Absorption of heat.
(c) Doesn’t involve any change in temperature.
(d) None of the options is correct.
Option a – Release of heat
During the evaporation of a liquid:
(a) The enthalpy decreases.
(b) The enthalpy increases.
(c) The internal energy decreases.
(d) The enthalpy remains unchanged.
Option b – The enthalpy increases
A fan produces a feeling of comfort during hot weather because ( Arihant All in One Chemistry Class 11 MCQ )
(a) Our body radiates more heat in the air.
(b) The fan supplies cool air.
(c) Conductivity of air increases.
(d) Our perspiration evaporates rapidly.
Option d – Our perspiration evaporates rapidly
Which statement is correct about the fusion of copper?
(a) A solid is formed.
(b) Heat is required.
(c) The process is exothermic.
(d) Heat is released.
Option b – Heat is required
The passage of an electric current through a conducting liquid causes ( Arihant All in One Chemistry Class 11 MCQ )
(a) Galvanic corrosion.
(b) Evaporation.
(c) Physical reaction.
(d) Chemical reaction.
Option d – Chemical reaction
Which one among the following metals is more reactive than hydrogen?
(a) Mercury.
(b) Copper.
(c) Silver.
(d) Tin.
Option d – Tin
When items of jewelry made of metals such as copper or nickel are placed in a solution having a salt of gold, a thin film of gold is deposited by:
(a) Cooling to below 0°C.
(b) Heating above 100°C.
(c) Passing an electric current.
(d) Just keep it for 10 min.
Option c – Passing an electric current
The conduction of electricity through the electrolyte solution is due to ( Arihant All in One Chemistry Class 11 MCQ )
(a) The movement of molecules of the electrolyte.
(b) The movement of ions of the electrolyte.
(c) The movement of separate atoms.
(d) The movement of particles of the solvent.
Option b – The movement of ions of the electrolyte
When a spoon is to be electroplated with nickel, the spoon is:
(a) Dipped in a nickel sulfate solution.
(b) Made the anode and a pure nickel rod the cathode.
(c) Made the cathode and a pure nickel rod the anode.
(d) Coated with nickel sulfate and dried.
Option c – Made the cathode and a pure nickel rod the anode
When two plates of different metals are placed in an electrolyte, the developed emf between them depends on ( Arihant All in One Chemistry Class 11 MCQ )
(a) The type of electrolyte.
(b) The distance between the plates.
(c) The position of the two metals in the electrochemical series.
(d) All of the above.
Option b – The distance between the plates
The working of a dry cell is based on:
(a) Decomposition reaction.
(b) Spontaneous oxidation-reduction reaction.
(c) Combination reaction.
(d) Electrolysis.
Option d – Electrolysis
The internal resistance of a dry cell is:
(a) Equal to that of an electrolytic cell.
(b) Smaller than that of an electrolytic cell.
(c) Higher than that of an electrolytic cell.
(d) Zero.
Option c – Higher than that of an electrolytic cell
In a hydrogen-oxygen fuel cell, combustion of hydrogen occurs to:
(a) Generate heat.
(b) Create a potential difference between the two electrodes.
(c) Produce high-purity water.
(d) Remove absorbed oxygen from electrode surfaces.
Option b – Create a potential difference between the two electrodes
The advantages of using a fuel cell in a motor car could be:
(a) Low initial cost.
(b) Emission-less operation.
(c) Lightweight.
(d) Freedom from refueling.
Option b – Emission-less operation
The depolarization in a primary cell is used for the purpose of:
(a) Increasing the life of the cell.
(b) Increasing the emf of the cell.
(c) Removing the hydrogen collected at one of the plates.
(d) Removing the dipoles from the electrolytes.
Option b – Increasing the emf of the cell
In an electrochemical cell that functions as a voltaic cell:
(a) Electrons move from the cathode to the anode.
(b) Electrons move through a salt bridge.
(c) Electrons can move either from the cathode to the anode or from the anode to the cathode.
(d) Reduction occurs at the cathode.
Option d – Reduction occurs at the cathode
Which type of colloidal system is expressed in the fog?
(a) Liquid in a gas
(b) Gas in a liquid
(c) Solid in a gas
(d) Liquid in liquid
Option a – Liquid in a gas
Which is a natural colloid?
(a) Urea
(b) Cane sugar
(c) Blood
(d) Sodium chloride
Option c – Blood
Gelatin is a lyophilic colloid. It is mostly used in making ice-creams to:
(a) Prevent making a colloid.
(b) Stabilize the colloid and prevent crystallization.
(c) Stabilize the mixture.
(d) Enrich the aroma.
Option b – Stabilize the colloid and prevent crystallization
Which one of the following is the best example of a desiccant?
(a) Silica gel
(b) Polystyrene
(c) Sodium chloride
(d) Sodium carbonate
Option a – Silica gel
A substance that readily forms a colloidal solution in contact with water is called:
(a) Extrinsic colloid
(b) Associated colloid
(c) Hydrophobic colloid
(d) Hydrophilic colloid
Option d – Hydrophilic colloid
Colloidal medicines are more effective because:
(a) The germs move towards them.
(b) They are cheap.
(c) They are easily assimilated and absorbed.
(d) They are easy to prepare.
Option c – They are easily assimilated and absorbed
Which of the following colloidal solutions is commonly used as a germ killer?
(a) Colloidal sulfur
(b) Colloidal gold
(c) Colloidal silver
(d) Colloidal antimony
Option a – Colloidal sulfur
Cloud is a colloidal dispersion of:
(a) Air in a dispersion medium of water.
(b) Fog in a dispersion medium of water.
(c) Mist in a dispersion medium of air.
(d) Water drops in a dispersion medium of air.
Option d – Water drops in a dispersion medium of air
Butter is a colloid formed when:
(a) Fat is dispersed in water.
(b) Fat globules are dispersed in water.
(c) Water is dispersed in fat.
(d) Suspension of casein in water.
Option c – Water is dispersed in fat
Which of the following is an example of a colloidal solution of liquid in solid?
(a) Mud
(b) Milk
(c) Cheese
(d) Rubber
Option c – Cheese
Which of these is not a colloid?
(a) Milk
(b) Blood
(c) Ice-cream
(d) Honey
Option d – Honey
Which one of the following colloidal systems is represented by soda water?
(a) Liquid in gas
(b) Gas in liquid
(c) Solid in gas
(d) Liquid in liquid
Option b – Gas in liquid
Which kind of catalysis can be explained on the basis of adsorption theory?
(a) Homogeneous catalysis
(b) Heterogeneous catalysis
(c) Negative catalysis
(d) Autocatalysis
Option b – Heterogeneous catalysis
Physical adsorption becomes appreciable at:
(a) High temperature
(b) Room temperature
(c) Low temperature
(d) None of the above
Option c – Low temperature
When oil floats on water, the surface tension of water:
(a) Vanishes immediately.
(b) Decreases considerably.
(c) Increases considerably.
(d) Remains unaffected.
Option d – Remains unaffected
If detergent is added:
(a) Surface tension decreases.
(b) Surface tension increases.
(c) Surface tension can increase or decrease.
(d) No effect
Option a – Surface tension decreases
Which of the following is a heterogeneous mixture?
(a) Solution
(b) Suspension
(c) Both solution and suspension
(d) Neither solution nor suspension
Option b – Suspension
Which one of the following is not the result of surface tension?
(a) Vapor formation above the liquid surface.
(b) Convex shape of liquid meniscus.
(c) Liquid rising in a capillary.
(d) Spherical shape of mercury fallen on the floor.
Option a – Vapor formation above the liquid surface
Soaps clean surfaces based on the principle of:
(a) Viscosity
(b) Floatation
(c) Elasticity
(d) Surface tension
Option d – Surface tension
Which of the following is an example of a chemical change?
(a) Dispersion of white light into the light of 7 colors when passed through a prism.
(b) Softening of vegetables when cooked.
(c) Wet soil lump, when dried, gets fragile.
(d) Dissolving of salt in water.
Option 2 – Softening of vegetables when cooked
The change of water into vapor is called:
(a) Natural
(b) Physical
(c) Chemical
(d) Biology
Option b – Physical
An example of a physical change is:
(a) Blackening of silverware.
(b) Burning of a candle.
(c) Making curd from milk.
(d) Dissolving of sugar in water.
Option b – Burning of a candle
Which one among the following is not a chemical change?
(a) Curdling of milk
(b) Ripening of fruit
(c) Evaporation of water
(d) Burning of coal
Option c – Evaporation of water
Which radioactive pollutant has recently drawn the attention of the public, due to its occurrence in building material?
(a) Radium
(b) Plutonium
(c) Radon
(d) Thorium
Option d – Thorium
The energy produced in stars by:
(a) Nuclear fission
(b) Nuclear fusion
(c) Exothermic chemical reactions
(d) Radioactive decay
Option b – Nuclear fusion
Nuclear fission is caused by the impact of:
(a) Proton
(b) Electron
(c) Neutron
(d) None of these
Option c – Neutron
The function of heavy water in a nuclear reactor is to:
(a) Slow down the speed of neutrons.
(b) Increase the speed of neutrons.
(c) Cool down the reactor.
(d) Stop the nuclear reaction.
Option a – Slow down the speed of neutrons
Which one of the following elements is essential for the construction of nuclear reactors?
(a) Cobalt
(b) Nickel
(c) Zirconium
(d) Tungsten
Option c – Zirconium
Enriched uranium means:
(a) Uranium with a high concentration of U-233.
(b) Uranium with a high concentration of U-235.
(c) Uranium with a high concentration of U-238.
(d) Uranium exposed to neutron radiation.
Option b – Uranium with a high concentration of U-235
The difference between a nuclear reactor and an atomic bomb is that:
(a) No chain reaction takes place in a nuclear reactor and it is not controlled.
(b) The chain reaction in a nuclear reactor is controlled.
(c) The chain reaction in a nuclear reactor is not controlled.
(d) No chain reaction takes place in an atomic bomb while it takes place in a nuclear reactor.
Option b – The chain reaction in a nuclear reactor is controlled
In the bottom-up synthesis of nanomaterials:
(A) Bulk material is breaking into nano.
(B) Bulk solids are disassembled into finer pieces.
(C) Molecular assemblies get combined atom by atom, molecule by molecule, and cluster by cluster.
(D) None of the above.
Option c – Molecular assemblies get combined atom by atom, molecule by molecule, and cluster by cluster
In the top-down synthesis of nanomaterials:
(A) Bulk material is breaking into nano size.
(B) Bulk solids are disassembled into finer pieces.
(C) Molecular assemblies get combined atom by atom, molecule by molecule, and cluster by cluster.
(D) Both ‘A’ and ‘B’
Option d – Both ‘A’ and ‘B’
Sol-gel method for the preparation of nanomaterials involves:
(A) Hydrolysis
(B) Polycondensation
(C) Thermal decomposition
(D) All of these
Option d – All of these
UV visible spectroscopy is used to detect:
(A) Primary confirmation of the formation of nanoparticles.
(B) Particle size of nanomaterial.
(C) Structure of the surface of the material.
(D) Absorption of functional group.
Option a – Primary confirmation of the formation of nanoparticles
The hardness of the material in nanosize is:
(A) Very high with respect to bulk material.
(B) Very low with respect to bulk material.
(C) Remains the same.
(D) Cannot predict.
Option a – Very high with respect to bulk material
Carbon nanotubes are:
(A) Conductor of electricity.
(B) Semiconductor.
(C) Bad conductor.
(D) Both ‘A’ and ‘B’.
Option d – Both ‘A’ and ‘B’
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