Matter in our surroundings MCQs with Answers

Question-1. A gas which obeys the gas laws is known as:

1. An ideal gas
2. A heavier gas
3. A lighter gas
4. A real gas

Question-2. A mixture of oil and water can be separated by

1. Sublimation
2. Crystallisation
3. Chromatography
4. Separating funnel

Question-3. As solid melts to form liquid:

1. Inter particle distance increases
2. Inter molecular forces of attraction decreases
3. Compressibility increases
4. All of the above

Question-4. At higher altitudes the boiling points of liquids

1. Increases
2. Decreases
3. Remains the same
4. Increases then decreases

Question-5. Cations migrate to…..............during electrolysis

1. Migrate to both cathode and anode
2. cathode
3. do not migrate to either cathode or anode
4. anode.

Question-6. CO2 can be easily liquified and even solidified because

1. It has weak forces of attraction
2. It has comparatively more force of attraction than other gases
3. It has more intermolecular space
4. It is present in atmosphere

Question-7. Conversion of solid to gas is called

1. vapourisation
2. condensation
3. liquefaction
4. sublimation

Question-8. Different components can be separated from petroleum by:

1. FiltrationA
2. Chromatography
3. Simple distillation
4. Fractional distillation

Question-9. Dry ice on heating produces:

1. Liquid CO2
2. Gas CO2
3. Liquid water
4. Water vapour

Question-10. During evaporation particles of a liquid change into vapours :

1. From the surface
2. From the bulk
3. From the bottom
4. From all over the liquid

Question-11. Equal volumes of all gases under similar conditions of temperature and pressure contain equal numbers of molecules. This statement was made by:

1. Gay- lussae
2. Avogadro
3. Berzilius
4. John Dalton

Question-12. Evaporation of a liquid can take place:

1. At its boiling point
2. At all temperatures
3. At its freezing point
4. At a fixed temperature

Question-13. Gases are liquefied under

1. high pressure, high temperature
2. high pressure, low temperature
3. low pressure, high temperature
4. low pressure, low temperature

Question-14. If a perfume bottle is opened in one corner of a room, the smell can be felt after sometime in the opposite corner. This shows that

1. particles of matter are constantly moving
2. the perfume is strong
3. the room has fan which circulates the perfume
4. none of these.

Question-15. In the separation of dyes A and B by chromatography, component B has more solubility in the solvent. Which component will rise faster?

1. A
2. B
3. Both at the same speed
4. Separation of dyes is independent of the solubility in solvent

Question-16. In which phenomenon does water change into water vapour below its boiling point:

1. Boiling
2. Evaporation
3. Freezing
4. Sublimation

Question-17. Kinetic energy of molecules is directly proportional to

1. Temperature
2. Pressure
3. Both (a&b)
4. Atmospheric pressure

Question-18. Latent heat of vapourisation is used to:

1. Overcome forces of attraction between the liquid particles at the boiling point
2. Overcome forces of attraction between solid particles at the freezing point
3. Increase the kinetic energy of particles in the liquid state
4. Increase the kinetic energy of the particles in the vapour phase

Question-19. Liquids have -

1. fixed volume and fixed shape
2. fixed shape and no fixed volume
3. fixed volume and no fixed shape
4. neither fixed volume nor fixed shape

Question-20. Number of electrons in parent atom is…............the cation

1. greater than
2. smaller than
3. equal to
4. can be greater or smaller than.

Question-21. Number of protons in parent atom is….........the anion

1. greater than
2. smaller than
3. equal to
4. can be greater or smaller than.

Question-22. Out of the following which is the densest state of matter?

1. Solids
2. Liquids
3. Gases
4. Plasmas

Question-23. Particles move randomly in:

1. Water
2. Sugar
3. Nitrogen
4. Dry ice

Question-24. Rate of diffusion of a gas is:

1. Directly proportional to its density
2. Directly proportional to its molecular mass
3. Inversely proportional to the square root of its density
4. Inversely proportional to the square root of its molecular mass

Question-25. The boiling point of water is:

1. 101°C at atmospheric pressure
2. 273K at atmospheric pressure
3. 0°C at atmospheric pressure
4. 0K at atmospheric pressure

Question-26. The characteristic property of mater is / are

1. it has mass
2. it has volume
3. it can be perceived by our senses
4. all three (A, B & C)

Question-27. The colour of vapours formed on sublimation of iodine solid is

1. Purple (violet)
2. Colourless
3. Yellow
4. Orange

Question-28. The conversion of solid to gas directly is called:

1. Evaporation
2. Sublimation
3. Distillation
4. condensation

Question-29. The conversion that takes place at room temperature is

1. boiling
2. evaporation
3. melting
4. freezing

Question-30. The density of matter will be highest in which state?

1. solid
2. liquid
3. gas
4. can not say

Question-31. The evaporation of a liquid can best be carried out in a:

1. Flask
2. China dish
3. T est tube
4. Beaker

Question-32. The formula of hydroxide radical is:

1. H+
2. H3O+
3. OH?
4. H?

Question-33. The increasing order of inter particle attractions of sugar, oxygen, gold, water is

1. sugar < oxygen < gold < water
2. sugar > oxygen > gold > water
3. oxygen < water < sugar < gold
4. oxygen > water > sugar > gold

Question-34. The inter particle distances are maximum in…..............and minimum in…..............

1. solids, liquids
2. solids, gases
3. gases, solids
4. liquids, solids

Question-35. The kinetic energy of the particles of a given substance will be least in

1. solid state
2. liquid state
3. gaseous state
4. can not say

Question-36. The matter that has stronger inter particle forces between an iron piece and a chalk piece is:

1. iron
2. chalk piece
3. both
4. neither

Question-37. The physical state of matter whose volume can change significantly by changing pressure only is:

1. solid
2. gas
3. liquid
4. all three

Question-38. The pressure exerted by a gas is due to

1. inter particle collisions
2. collisions with the walls of the container
3. gravity
4. atmospheric pressure

Question-39. The process of evaporation causes:

1. Cooling
2. Heating
3. Dryness
4. None of the above

Question-40. The quantity of matter in 1 kg of cotton is _______ that present in 1 kg of sugar

1. smaller than
2. greater than
3. equal to
4. can not say.

Question-41. The quantity of matter present in an object is called its:

1. Weight
2. Gram
3. Mass
4. Density

Question-42. The sequence of steps for separating a mixture of salt, sand and camphor is

1. Adding water, filtration, evaporation, sublimation
2. Adding water, filtration, sublimation, evaporation
3. Sublimation, adding water, filtration, evaporation
4. Sublimation, adding water, evaporation, filtration

Question-43. The type of motion that is present in gases is:

1. random
2. linear (in a straight line)
3. vibratory
4. circular

Question-44. The type of motion that is present in liquids is:

1. random
2. linear (in a straight line)
3. vibratory
4. circular

Question-45. The type of motion that is present in solids is:

1. random
2. linear (in a straight line)
3. vibratory
4. circular

Question-46. The volume of matter in 1 kg of cotton is…..............that present in 1 kg of sugar

1. smaller than
2. grater than
3. equal to
4. can not say.

Question-47. We get the smell of hot food in the kitchen outside the house because of:

1. Boiling
2. Evaporation
3. Sublimation
4. Diffusion

Question-48. Wet clothes are kept for drying. Which of the following does not help them in drying:

1. Cooling the room
2. Spreading it out
3. Blowing wind over it
4. Making the room a little warmer

Question-49. Wet clothes are kept for drying. Which of the following does not help them in drying:

1. Spreading it out
2. Blowing wind over it
3. Making the room a little warmer
4. Cooling the room

Question-50. What s the term used to describe the phase change as a liquid becomes a solid?

1. Evaporation
2. Condensation
3. Freezing
4. None of the above

Question-51. When a bottle of soda water is opened, carbon dioxide escapes, producing a fizz. This is due to:

1. Decrease in solubility on decreasing temperature
2. Decrease in solubility on increasing temperature
3. Decrease in solubility on decreasing pressure
4. Decrease in solubility on increasing pressure

Question-52. When a gas jar full of air is placed upside down on a gas jar full of bromine vapours, the red-brown vapours of bromine from the lower jar go upward into the jar containing air. In this experiment:

1. Air is heavier than bromine
2. Both air and bromine have the same density
3. Bromine is heavier than air
4. Bromine cannot be heavier than air because it is going upwards against gravity

Question-53. When water at 0°C freezes to form ice at the same temperature of 0°C, then it:

1. Absorbs some heat
2. Releases some heat
3. Neither absorbs nor releases heat
4. Absorbs exactly 3.34 x 105J/kg of heat

Question-54. When we add sugar in water, particles of sugar disappear because they -

1. are very small
2. get into the spaces between water particles
3. are moving
4. all above

Question-55. When we blow air into the balloon it inflates because:

1. Air particles diffuse into the balloon
2. Air particles collide with the walls of the balloon and exert pressure on them
3. Rubber is elastic in nature
4. The temperature of air in the balloon increases

Question-56. When we put some crystals of potassium permanganate in a beaker containing water, we observe that after sometime whole water has turned pink. This is due to:

1. Boiling
2. Melting of potassium permanganate crystals
3. Sublimation of crystals
4. Diffusion

Question-57. Which are the favourable conditions for liquefaction of petroleum gas:

1. High pressure, high temperature
2. Low pressure, low temperature
3. High pressure, low temperature
4. Low pressure, high temperature

Question-58. Which condition out of the following will increase the evaporation of water?

1. Increase in temperature of water
2. Decrease in temperature of water
3. Less exposed surface area of water
4. Adding common salt to water

Question-59. Which is not a pure substance in the four options given?

1. alloy
2. sugar
3. distilled water
4. copper wire

Question-60. Which is not the characteristic of matter ?

1. particles of a matter are continuously moving,
2. particles of matter move faster on increasing temperature,
3. particles of matter intermix with each other on their own,
4. particles of all maters have same kinetic energy

Question-61. Which of the following describes a liquid state:

1. Definite volume and definite shape
2. Definite volume and no specific shape
3. definite shape but no definite volume
4. neither definite shape nor definite volume

Question-62. Which of the following has highest density?

1. Kerosene
2. Water
3. Iron
4. Wood

Question-63. Which of the following has highest intermolecular forces of attraction?

1. Water at room temperature
2. CO2 gas
3. Ethyl alcohol
4. Iron metal

Question-64. Which of the following is not characteristic of solid:

1. High Rigidity
2. Regular Shape
3. High density
4. High compressibility

Question-65. Which of the following is the correct set of apparatus for fractional distillation?

1. Round bottomed flask, thermometer, water condenser and beaker
2. Round bottomed flask, thermometer, air condenser and beaker
3. Round bottomed flask, thermometer, fractionating column, water condenser and flask
4. Round bottomed flask, thermometer, fractionating column, air condenser and flask

Question-66. Which of the following phenomena always results in the cooling effect?

1. Condensation
2. Evaporation
3. Sublimation
4. None of these

Question-67. Which of the following phenomena would increase on raising the temperature?

1. Diffusion, evaporation, compression of gases
2. Evaporation, compression of gases, solubility
3. Evaporation, diffusion, expansion of gases
4. Evaporation, solubility, diffusion, compression of gases

Question-68. Which of the following represents a chemical change?

1. Extraction of copper from copper pyrites
2. Distillation of water
3. Melting of wax
4. Dissolution of salt in water

Question-69. Which of the following statement is not true regarding the characteristic of matter?

1. Particles of a matter are randomly moving in all directions
2. Kinetic energy of the particles increases with a rise in temperature
3. Kinetic energy of the particles of all maters remains the same at a particular temperature.
4. Particles of matter diffuse into each other on their own.

Question-70. Which of the following substances becomes liquid easily upon heating?

1. butter
2. glass
3. sponge
4. rubber band

Question-71. Which of the following substances will undergo sublimation?

1. Common salt
2. Odonil
3. Sugar
4. Sand

Question-72. Which of these will exhibit the Tyndall effect?

1. A and D
2. B and C
3. A and B
4. D

Question-73. Which of these will form a clear and transparent solution

1. A
2. B
3. A and B
4. B and D

Question-74. Which one is a sublime substance?

1. Table salt
2. Sugar
3. Iodine
4. Potassium iodide

Question-75. Zig-zag movement of the solute particle in a solution is known as

1. Linear motion
2. Circular motion
3. Brownian motion
4. Curved motion

Question-76. 0 ° C temperature is equal to

1. 0 K
2. 273 K
3. -273 K
4. 300 K