Q 1 – What is the boiling point of acetone?
(a) 196°C
(b) 186°C
(c) 78.3°C
(d) 183°C
Q 2 – The room temperature on Celsius scale is 25°C. What is the temperature on the Kelvin scale?
(a) 50K
(b) 200K
(c) 300K
(d) 298K
Q 3 – Which of the following will show the “Tyndall effect”?
(a) Salt solution
(b) Milk and starch solution
(c) Copper sulphate solution
(d) None of them
Q 4 – The size of colloidal particles are:
(a) 10-4 – 10-8 m
(b) 10-10 – 10-12 m
(c) 10-2 – 10-4 m
(d) 10-10 – 10-8 m
Q 5 – Which condition out of the following will increase the evaporation of water?
(a) Increase in temperature of water
(b) Decrease in temperature of water
(c) Less exposed surface area of water
(d) Adding common salt to water
Q 6 – Which of the following are physical changes?
(i) Melting of iron metal
(ii) Rusting of iron
(iii) Bending of an iron rod
(iv) Drawing a wire of iron metal
(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (i), (iii) and (iv)
(d) (ii), (iii) and (iv)
Q 7 – Which of the following statements are true for pure substances?
(i) Pure substances contain only one kind of particles
(ii) Pure substances may be compound or mixtures
(iii) Pure substances have the same composition throughout
(iv) Pure substances can be exemplified by all elements other than nickel
(a) (i) and (ii)
(b) (i) and (iii)
(c) (iii) and (iv)
(d) (ii) and (iii)
Q 8 – Rusting of an article made up of iron is called
(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change
Q 9 – Tincture of iodine has antiseptic properties. This solution is made by dissolving
(a) iodine in potassium iodide
(b) iodine in vaseline
(c) iodine in water
(d) iodine in alcohol
Q 10 – In an endothermic process heat is absorbed, in an exothermic process heat is evolved and in an athermic process no thermal
change is observed. What is the nature of evaporation of ether?
(a) Athermic
(b) Exothermic
(c) First exothermic then endothermic
(d) Endothermic
Q 11 – Blood and sea water are
(a) both mixtures
(b) both are compounds
(c) blood is a mixture whereas sea water is a compound
(d) blood is a compound and sea water is a mixture
Q 12 – When alcohol is kept in a china dish it evaporates, temperature falls and cooling is produced. Which one is the correct method to record the temperature?
(a) By using a thermometer
(b) By taking help from the teacher.
(c) By smell of alcohol vapour
(d) By touching the surface of china dish
Q 13 – Sol and gel are examples of
(a) Solid-solid colloids
(b) Sol is a solid-liquid colloid and gel is liquid solid colloid
(c) Sol is solid-solid colloid and gel is solid-liquid colloid
(d) Sol is a liquid-solid colloid and gel is a solid-liquid colloid
Q 14 – In a water-sugar solution
(a) water is solute and sugar is solvent
(b) water is solvent and sugar is solute
(c) water is solute and water is also solvent
(d) none of these
Q 15 – Two substances, A and B were made to react to reaction a third substance, A2B according to the following
2 A + B → A2B
Which of the following statements concerning this reaction are incorrect?
(i) The product A2B shows the properties of substances A and B
(ii) The product will always have a fixed composition
(iii) The product so formed cannot be classified as a compound
(iv) The product so formed is an element
(a) (i), (ii) and (iii)
(b) (ii), (iii) and (iv)
(c) (i), (iii) and (iv)
(d) (ii), (iii) and (iv)
Q 16 – Two chemical species X and Y combine together to form a product P which contains both X and Y , X + Y → P
X and Y cannot be broken down into simpler substances by simple chemical reactions. Which of the following concerning the species X, Y and P are correct?
(i) P is a compound
(ii) X and Y are compounds
(iii) X and Y are elements
(iv) P has a fixed composition
(a) (i), (ii) and (iii)
(b) (i), (ii) and (iv)
(c) (ii), (iii) and (iv)
(d) (i), (iii) and (iv)
Q 17 – Which of the following statement is not true regarding the characteristic of matter?
(a) Particles of a matter are randomly moving in all directions.
(b) Kinetic energy of the particles increases with a rise in temperature
(c) Kinetic energy of the particles of all maters remains the same at a particular temperature.
(d) Particles of matter diffuse into each other on their own.
Q 18 – Which of the following methods would you use to separate cream from milk?
(a) Fractional distillation
(b) Distillation
(c) Centrifugation
(d) Filtration
Q 19 – How does the state of matter change during the fusion process?
(a) Gas changes to solid
(b) Solid changes to liquid
(c) Gas changes to liquid
(d) Liquid changes to gas
Q 20 – Cooking of food and digestion of food:
(a) are both physical processes
(b) are both chemical processes
(c) cooking is physical whereas digestion is chemical
(d) cooking is chemical whereas digestion is physical
Q 21 – Mercury and bromine are both
(a) liquid at room temperature
(b) solid at room temperature
(c) gases at room temperature
(d) both (a) and (b)
Q 22 – Which of the following property does not describe a compound?
(a) It is composed of two or more elements
(b) It is a pure substance.
(c) It cannot be separated into constituents by physical means
(d) It is mixed in any proportion by mass
Q 23 – The smell of hydrogen sulphide (H2S) gas
(a) pleasant
(b) of rotten egg
(c) of burning sulphur
(d) None of these
Q 24 – What is the principle behind the process of centrifugation?
(a) Particles are separated based on the difference in colour.
(b) Denser particles are forced to the bottom and lighter particles stay at the top when spun rapidly.
(c) Lighter particles are forced to the bottom and denser particles stay at the top when spun rapidly.
(d) Particles are separated based on the difference in temperature.
Q 25 – What will you observe when a mixture of iodine and salt is heated in a china dish?
(a) No change in the china dish is observed.
(b) Salt is left behind in the china dish.
(c) Iodine is left behind in the china dish.
(d) The mixture starts melting.
Q 26 – Which technique is used in diagnostic laboratories for blood and urine test?
(a) Sublimation
(b) Centrifugation
(c) Evaporation
(d) Magnetic separation
Q 27 – Which method is used to separate cream from milk?
(a) Centrifugation
(b) Adsorption
(c) Distillation
(d) Crystallization
Q 28 – The continuous zig-zag movement of colloidal particles in a dispersion medium is called
(a) Dispersion
(b) Tyndall effect
(c) Brownian movement
(d) Oscillation
Q 29 – What do you understand by the term concentrated solution?
(a) Solution containing no solute
(b) Solution with low solute concentration
(c) Solution in which no more solute can be dissolved
(d) Solution with high solute concentration
Q 30 – The clear liquid which is left behind in the beaker after settling down of the sediments is called:
(a) Solvent
(b) Supernatant liquid
(c) Solution
(d) Sediment
Q 31 – Which of the following statements is incorrect about physical changes?
(a) There is no gain or loss of energy.
(b) It is permanent and irreversible.
(c) Composition of the substance remains same.
(d) No new substance is formed.
Q 32 – A solution in which no more solute can be dissolved at a given temperature is known as:
(a) Unsaturated solution
(b) True solution
(c) Dilute solution
(d) Saturated solution
Q 33 – Which of the following apparatus is not required in sublimation?
(a) Condenser
(b) Funnel
(c) China dish
(d) Wire gauze
Q 34 – Which of the following method can be used to separate a mixture of camphor and sugar?
(a) Sublimation
(b) Filtration
(c) Distillation
(d) Crystallisation
Q 35 – Rohan visited an LPG unit and found that the gas can be liquified at specific conditions of temperature and pressure. Help him
to identify the correct set of conditions.
(a) High temperature and high pressure
(b) Low temperature and low pressure
(c) Low temperature and high pressure
(d) High temperature and low pressure
Q 36 – The process of separation of insoluble solids from a liquid is called:
(a) Filtration
(b) Decantation
(c) Crystallisation
(d) Evaporation
Q 37 – If a solution contains 60g of common salt in 340g of water, the mass by mass percentage will be:
(a) 25 %
(b) 15 %
(c) 20 %
(d) 17.6 %
Q 38 – During sublimation of ammonium chloride, pure ammonium chloride gets:
(a) Liquefies to form a solution
(b) Collected on outer sides of the funnel
(c) Collected on inner sides of the china dish
(d) Collected on inner sides of the funnel
Q 39 – During filtration, the solid that remains on the filter paper is called:
(a) Solute
(b) Residue
(c) Solvent
(d) Filtrate
Q 40 – Which of the following has the highest solubility at 313 K?
(a) KNO3
(b) NaCl
(c) KCl
(d) NH4Cl
Q 41 – A chemical reaction involves in
(a) Only breaking of bonds
(b) Only formation of bonds
(c) Both breaking and formation of bonds
(d) None of these
Q 42 – What is the use of sedimentation tank in water purification system?
(a) To separate out the insoluble substances from water.
(b) To separate out very small suspended particles from water.
(c) To kill the germs present in water.
(d) All of the above.
Q 43 – Which of the following statement is true for colloids?
(a) Colloid is a homogeneous mixture.
(b) Particles of a colloid can be seen by naked eye.
(c) Particles of colloid scatter a beam of light passing through it.
(d) All of these
Q 44 – What type of mixture is obtained on continuous stirring when we add one spoon of sugar to water?
(a) Homogeneous mixture
(b) Colloid
(c) Suspension
(d) Heterogeneous mixture
Q 45 – Most paints are:
(a) Gels
(b) Suspensions
(c) Emulsions
(d) Sols
Q 46 – Which is the best technique to separate coffee grains from coffee solution?
(a) Distillation
(b) Evaporation
(c) Filtration
(d) Chromatography
Q 47 – Which of the following phenomena would increase on raising the temperature?
(a) Diffusion, evaporation, compression of gases
(b) Evaporation, compression of gases, solubility
(c) Evaporation, diffusion, expansion of gases
(d) Evaporation, solubility, diffusion, compression of gases
Q 48 – Seema visited a Natural Gas Compressing unit and found that the gas can be liquefied under specific conditions of temperature and pressure. While sharing her experience with friends she got confused. Help her to identify the correct set of conditions.
(a) Low temperature, low pressure
(b) High temperature, low pressure
(c) Low temperature, high pressure
(d) High temperature, high pressure
Q 49 – A few substances are arranged in the increasing order of ‘forces of attraction’ between their particles. Which one of the following represents a correct arrangement?
(a) Water, air, wind
(b) Air, sugar, oil
(c) Oxygen, water, sugar
(d) Salt, juice, air
Q 50 – On converting 25°C, 38°C and 66°C to Kevlin scale, the correct sequence of temperature will be
(a) 298 K, 311 K and 339 K
(b) 298 K, 300 K and 338 K
(c) 273 K, 278 K and 543 K
(d) 298 K, 310 K and 338 K
Q 51 – Choose the correct statement from the following:
(a) Conversion of solid into vapour without passing through the liquid state is called vapourisation.
(b) Conversion of vapour into solid without passing through the liquid state is called sublimation.
(c) Conversion of vapour into solid without passing through the liquid state is called freezing.
(d) Conversion of solid into liquid is called sublimation.
Q 52 – The boiling points of diethyl ether, acetone and n-butyl alcohol are 35°C, 56°C and 118°C respectively. Which one of the following correctly represents their boiling points in Kelvin scale?
(a) 306 K, 329 K and 391 K
(b) 308 K, 329 K and 392 K
(c) 308 K, 329 K and 391 K
(d) 329 K, 392 K and 308 K
Q 53 – In which of the following conditions, the distance between the molecules of hydrogen gas would increase?
(i) Increasing pressure on hydrogen contained in a closed container
(ii) Some hydrogen gas leaking out of the container
(iii) Increasing the volume of the container of hydrogen gas
(iv) Adding more hydrogen gas to the container without increasing the volume of the container
(a) (i) and (iii)
(b) (i) and (iv)
(c) (ii) and (iii)
(d) (ii) and (iv)
Q 54 – Dry ice is
(a) water in solid state
(b) water in gaseous state
(c) CO2 in liquid state
(d) CO2 in solid state
Q 55 – A form of matter has no fixed shape but it has a fixed volume. An example of this form of matter is
(a) Krypton
(b) Kerosene
(c) Carbon steel
(d) Carbon dioxide
Q 56 – Find the incorrect statement
(a) Low boiling liquids evaporate faster than high boiling liquids.
(b) Cooling is caused during boiling
(c) The normal room temperature is 298 K
(d) Evaporation is a surface phenomenon but boiling is not
Q 57 – The correct procedure of heating iron-sulphur mixture to prepare iron sulphide is: :
(a) Heat the powder mixture at the base of the test tube using a blue flame throughout.
(b) Heat the iron filings and sulphur mixture in the middle of the test tube using yellow flame throughout.
(c) Heat the powder mixture at the top of the test tube using an orange flame throughout.
(d) Heat the iron filings-sulphur mixture at 3/4 quarters of the test tube using a red flame throughout.
Q 58 – The interparticle forces are the strongest in
(a) Ammonia
(b) Sodium Bromide
(c) Ethyl alcohol
(d) Carbon dioxide
Q 59 – Which of the following statements is incorrect?
(a) Matter is made up of particles
(b) Particles of matter are always in state of motion
(c) Matter is continuous in nature
(d) Particles of matter attract each other
Q 60 – When heat is constantly supplied by a burner to boiling water, then the temperature of water during vaporisation :
(a) Rises very slowly
(b) Rises rapidly until steam is produced
(c) First rises and then becomes constant
(d) Does not rise at all
Q 61 – Which one of the following statements is not true?
(a) The molecules in a solid vibrate about a fixed position
(b) The molecules in a liquid are arranged in a regular pattern
(c) The molecules in a gas exert negligibly small forces on each other, except during collisions
(d) The molecules of a gas occupy all the space available
Q 62 – Sonali took a 100 ml beaker and filled half the beaker with water and marked the level of water. She dissolved some salt with
the help of a glass rod and recorded water level again.
Choose the correct observation related to above activity
(a) The water level increases appreciably
(b) The water level decreases
(c) The water level remains the same
(d) There is little increase in water level
Q 63 – Particles of matter are continuously moving. What is the effect of rise in temperature on moving particles?
(a) With rise in temperature, particles move faster
(b) With rise in temperature, particles stop moving
(c) With rise in temperature, particles move slowly
(d) None of the above
Q 64 – Choose the correct statement out of the following.
(a) Conversion of solid into vapours without passing through the liquid state is called vaporisation
(b) Conversion of vapours into solid without passing through the liquid state is called sublimation
(c) Conversion of vapours into solid without passing through the liquid state is called freezing
(d) Conversion of solid into liquid is called sublimation
Q 65 – Which of the following is correct order of forces of attraction?
(a) Water > Air > Sand
(b) Air > Sugar > Oil
(c) Air < Water < Sugar
(d) Salt > Air > Juice
Q 66 – As the solid melts to form liquid,
(a) compressibility increases
(b) interparticle forces of attraction decreases
(c) the kinetic energy of the particle increases
(d) all of these
Q 67 – Which of the following does not undergo sublimation?
(a) Ammonium chloride
(b) Sodium chloride
(c) Solid carbon dioxide
(d) Iodine
Q 68 – Which of the following will not sublimate ?
(a) Camphor
(b) ammonium chloride
(c) bromine
(d) Iodine
Q 69 – Which of the following is not a property of solids?
(a) Interparticle spaces are minimum
(b) Definite shape and volume
(c) Forces of attraction between the particles are maximum
(d) Particles can move freely within a limited space
Q 70 – Solids do not flow because
(a) of large molecular space between particles
(b) they do not have definite shape
(c) they have very strong intermolecular forces in between particles
(d) all of these