States of Matter JEE Mains Questions. We covered all the States of Matter JEE Mains Questions in this post for free so that you can practice well for the exam.
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States of Matter JEE Mains Questions for JEE Students
Water boils at a lower temperature at high altitudes, because
(a) the air pressure is less
(b) the outside temperature is less
(c) the latent heat is less
(d) None of the above
Option a – the air pressure is less
Which of the following has the lowest melting point?
(a) Lead
(b) Zinc
(c) Silver
(d) Tin
Option d – Tin
The absolute zero, i.e. temperature below which is not achievable, is about
(a) 0°C
(b) -273 K
(c) -273°C
(d) -300°C
Option c – -273°C
Which one of the following is used as an anti-freeze, which effectively depresses the freezing point of water in an automobile?
(a) Ethylene glycol
(b) Propanoic acid
(c) Glutamic acid
(d) Glycolic acid
Option a – Ethylene glycol
In the winter season especially in cold countries, ethylene glycol is added to water in the radiators of cars. It results in
(a) reducing the viscosity of water.
(b) lowering the freezing point of water.
(c) lowering the boiling point of water.
(d) reducing the specific heat of the water.
Option b – lowering the freezing point of water
The temperature to which a gas must be cooled before it can be liquefied by compression is called
(a) Boyle’s temperature
(b) critical temperature
(c) liquefaction temperature
(d) inversion temperature
Option b – critical temperature
Which one of the following could be the melting point of iron?
(a) 25°C
(b) 37°C
(c) 500°C
(d) 1500°C
Option d – 1500°C
Consider the following statements. I. A real gas can be approximated as an ideal gas when it is highly dilute. II. Only monoatomic gases can be approximated as ideal gases. III. An ideal gas does not undergo phase transitions. Which of the above statements is correct?
(a) I and II
(b) I and III
(c) II and III
(d) I, II and III
Option b – I and III
The temperature of a place on one sunny day is 113 in Fahrenheit scale. The Kelvin scale reading of this temperature will be
(a) 318 K
(b) 45 K
(c) 62.8 K
(d) 335.8 K
Option a – 318 K
Why do two ice blocks join to form one block when pressed together?
(a) The melting point of ice is lowered with an increase in pressure.
(b) The melting point of ice increases with an increase in pressure.
(c) The melting point of ice remains unchanged with an increase in pressure.
(d) The melting point of ice is 0°C.
Option a – The melting point of ice is lowered with an increase in pressure
The process of change from liquid to gas is called ……
(a) precipitation
(b) vaporization
(c) decantation
(d) condensation
Option b – vaporization
Rate of evaporation increases with
(a) an increase in surface area.
(b) an increase in humidity.
(c) a decrease in wind speed.
(d) a decrease in temperature.
Option a – an increase in surface area
A liquid is kept in a glass beaker. Which one of the following statements is correct regarding the pressure exerted by the liquid column at the base of the beaker?
(a) The pressure depends on the area of the base of the beaker.
(b) The pressure depends on the height of the liquid column.
(c) The pressure does not depend on the height of the liquid column.
(d) The pressure neither depends on the area of the base of the beaker nor on the height of the liquid column.
Option b – The pressure depends on the height of the liquid column
Consider the following statements. I. When evaporation takes place, cooling takes place. II. Evaporation takes place at all temperatures, and boiling takes place only at the boiling point. III. Evaporation is a surface phenomenon. Which of the statements given above is/are true?
(a) Only I
(b) I and II
(c) II and III
(d) I, II, and III
Option d – I, II, and III
The following properties will decrease with an increase in temperature except?
(a) Surface
(b) Vviscosity
(c) Density
(d) Vapour pressure
Option d – Vapour pressure
A pressure cooker works on the principle of
(a) elevation of the boiling point of water by application of pressure.
(b) making the food grains softer by the application of pressure.
(c) making the food grains softer by the application of pressure and temperature.
(d) keeping the food grains inside steam for a longer time.
Option a – elevation of the boiling point of water by application of pressure
Which chemical law proposes that ‘soft drinks and soda bottles are sealed under high pressure to increase the solubility of CO₂?
(a) Raoult’s Law
(b) Henry’s Law
(c) Ohm’s Law
(d) Dalton’s Law
Option b – Henry’s Law
Ammonia (NH3) obtained from different sources always has the same proportion of nitrogen and hydrogen. It proves the validity of the law of
(a) Reciprocal proportion
(b) Constant proportion
(c) Multiple proportions
(d) None of the above.
Option b – Constant proportion
Assertion (A) All molecules of an ideal gas move with the same speed. Reason (R) There is no attraction between the molecules in an ideal gas. Codes
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Option c – A is true, but R is false
Which one of the following gemstones contains beryllium metal?
(a) Topaz
(b) Emerald
(c) Ruby
(d) Blue sapphire
Option b – Emerald
Which one of the following is called Dry Ice?
(a) Solid carbon dioxide
(b) Liquid carbon dioxide
(c) Liquid nitrogen
(d) Liquid ammonia
Option a – Solid carbon dioxide
A student by chance mixed acetone with alcohol. The mixture of acetone and alcohol can be separated by
(a) filtration
(b) separating funnel
(c) fractional crystallisation
(d) fractional distillation
Option d – fractional distillation
When the milk is churned vigorously the cream from it is separated out due to
(a) gravitational force
(b) frictional force
(c) centrifugal force
(d) centripetal force
Option c – entrifugal force
Very small insoluble particles in a liquid may be separated by using
(a) crystallisation
(b) fractional distillation
(c) centrifugation
(d) decantation
Option d – decantation
Chromatography is based on which of the following?
(a) Different solubilities of different substances in different mediums.
(b) Same solubilities of different substances in the same medium.
(c) Different solubilities of different substances in the same medium.
(d) Both (a) and (b)
Option c – Different solubilities of different substances in the same medium
Glasses and plastics are
(a) amorphous solids
(b) supercooled liquids
(c) Both (a) and (b)
(d) None of the above
Option c – Both (a) and (b)
Quartz is extensively used as a piezo-electric material. It contains
(a) Hg
(b) Si
(c) Ti
(d) Sn
Option b – Si
Silica in amorphous form is used in
(a) photovoltaic cells
(b) conductivity cells
(c) standard hydrogen electrodes
(d) None of the above
Option a – photovoltaic cells
Which one of the following statements is not correct?
(a) All carbons in diamonds are linked by a carbon-carbon single bond.
(b) Graphite is a layered structure in which layers are held together by weak Vander Waal’s forces.
(c) Graphite layers are formed by hexagonal rings of carbon atoms.
(d) Graphite layers are held together by a carbon-carbon single bond.
Option d – Graphite layers are held together by a carbon-carbon single bond
Which one of the following is not true for the form of carbon known as a diamond?
(a) It is harder than graphite.
(b) It contains the same percentage of carbon as graphite.
(c) It is a better electric conductor than graphite.
(d) It has different carbon-to-carbon distances in all directions.
Option c – It is a better electric conductor than graphite
Amorphous materials are in fact considered as
(a) supercooled liquids
(b) supercooled solids
(c) covalent networks
(d) molecular crystals
Option a – supercooled liquids
Which of the following is used to remove the green colour from glass?
(a) Silicon dioxide
(b) Titanium dioxide to s
(c) Sulphur dioxide
(d) Manganese dioxide
Option d – Manganese dioxide
At very low temperatures, oxygen 0₂, freezes and forms a crystalline solid, which term best describes the solids?
(a) Covalent network
(b) Molecular crystals
(c) Metallic
(d) ionic
Option b – Molecular crystals
A molecule of a substance is similar to its atom for
(a) diatomic molecule
(b) polyatomic molecule
(c) monoatomic molecule
(d) triatomic molecule
Option c – monoatomic molecule
Which one of the following is mono-atomic?
(a) Hydrogen
(b) Sulphur
(c) Phosphorus
(d) Helium
Option d – Helium
Which one of the following is not a monoatomic element?
(a) Copper
(b) Helium
(c) lodine
(d) Barium
Option c – Iodine
……… are homogeneous mixtures of two or more components.
(a) Amalgams
(b) Solutions
(c) Enzymes
(d) Emulsions
Option b – Solutions
Statement I All compounds contain more than one element. Statement II All compounds are heterogeneous mixtures. Codes
(a) Both the statements are individually true and statement II is the correct explanation of statement I.
(b) Both statements are individually true but statement II is not the correct explanation of statement I.
(c) Statement I is true, but statement II is false.
(d) Statement I is false, but statement II is true.
Option c – Statement I is true, but statement II is false
lodine can be separated from a mixture of iodine and potassium chloride by
(a) sedimentation
(b) filtration
(c) sublimation
(d) distillation
Option c – sublimation
The latest discovered state of matter is
(a) solid
(b) Bose-Einstein condensate
(c) plasma
(d) liquid
Option b – Bose-Einstein condensate
Bose-Einstein condensate is a
(b) the fifth state of matter
(c) plasma
(d) state of condensed matter
Option b – the fifth state of matter
Matter around us can exist in three different states, namely, solid, liquid and gas. The correct order of their compressibility is
(a) Liquid < Gas < Solid
(b) Solid < Liquid < Gas
(c) Gas < Liquid < Solid
(d) Solid< Gas < Liquid
Option b – Solid
Which one of the following statements is incorrect?
(a) The measurable unit of pressure is denoted in metres.
(b) The matter is made up of small particles.
(c) Evaporation causes cooling.
(d) Brass is a mixture of 30% zinc and 70% copper.
Option a – The measurable unit of pressure is denoted in metres
Consider the following statements about the mixture? I. A substance can be separated into other kinds of matter by any physical process. II. Dissolved sodium chloride can be separated from water by the physical process of evaporation. Which of the statements given above is/are correct?
(a) Only I
(b) Only II
(c) Both I and II
(d) Neither I nor II
Option b – Only II
At absolute zero, which one of the following is zero for a gas?
(a) Potential energy
(b) Kinetic energy
(c) Vibration energy
(d) None of the above
Option b – Kinetic energy
Which of the following gases will have the highest rate of diffusion?
(a) O₂
(b) CO₂
(c) NH3
(d) N₂
Option c – NH3
The gas used in a refrigerator is
(a) cooled down on flowing.
(b) heated up on flowing
(c) cooled down when compressed.
(d) cooled down when expanded.
Option d – cooled down when expanded
A balloon filled with ethylene is pricked with a sharp point and quickly dropped in a tank of H₂ gas under identical conditions. After a while, the balloon will have
(a) shrunk
(b) enlarged
(c) completely collapsed
(d) remained unchanged in size
Option b – enlarged
Some of the following properties are transport properties. I. Viscosity II. Surface tension III. Thermal conductance IV. Diffusion Select the correct alternative of transport properties.
(a) I, II, III, IV
(b) I, III, IV
(c) I, III
(d) III, IV
Option b – I, III, IV
Consider the following statements. I. The rate of diffusion of liquids is higher than that of solids. II. In the liquid state, particles move freely and have greater space between each other as compared to particles in the solid state. Which of the statement(s) given above is/are correct?
(a) Only I
(b) Only II
(c) Both I and II
(d) None of these
Option c – Both I and II
Assertion (A) All liquids are conductors of electricity. Reason (R) Under the condition of low pressure and high voltage, liquids can be made conducting. Codes
(a) Both A and R are true and R is the correct explanation of A
(b) Both A and R are true, but R is not the correct explanation of A
(c) A is true, but R is false
(d) A is false, but R is true
Option d – A is false, but R is true
The creation of something from nothing is against the law of
(a) Constant proportions
(b) Conservation of mass-energy
(c) Multiple proportions
(d) Reciprocal Proportions
According to which one of the following laws is indicated that when two or more gases react with one another, their volumes bear a simple ratio?
(a) Law of Mass Action
(b) Law of Multiple Proportions
(c) Law of Reciprocal Proportions
(d) Law of Combining Volumes
Option d – Law of Combining Volumes
At constant temperature, the product of pressure and volume of a given amount of a gas is constant. This is
(a) Gay-Lussac Law
(b) Charles Law
(c) Boyle’s Law
(d) Pressure Law
Option c – Boyle’s Law
Name the law in Physics which states that an equal volume of all gases under the same conditions of temperature and pressure contain an equal number of molecules.
(a) Avogadro’s Law
(b) Boyles’s Law
(c) Ohm’s Law
(d) Charles’s Law
Option a – Avogadro’s Law
The proposition equal volumes of different gases contain equal numbers of molecules at the same temperature and pressure is known as
(a) Avogadro’s hypothesis
(b) Gay-Lussac’s hypothesis
(c) Planck’s hypothesis
(d) Kirchhoff’s hypothesis
Option a – Avogadro’s hypothesis
An ideal gas is one which obeys
(a) Gas Law
(b) Boyle’s Law
(c) Charle’s Law
(d) Avogadro’s Law
Option a – Gas Law
In general equation pV = nRT, V is the volume of
(a) n mole of a gas
(b) any amount of gas
(c) one mole of a gas
(d) one gram of a gas
Option a – n mole of a gas
Air at sea level is found to be dense. This is in accordance with
(a) Boyle’s Law
(b) Charle’s Law
(c) Dalton’s Law
(d) Avogadro’s Law
Option a – Boyle’s Law
For an ideal gas, which one of the following statements is not true?
(a) The speed of all gas molecules is the same.
(b) The kinetic energies of all gas molecules are not the same.
(c) The potential energy of the gas molecules is zero.
(d) There is no interactive force between the molecules.
Option a – The speed of all gas molecules is the same
A balloon filled with helium rises in the air because
(a) air exerts an upward force on the balloon
(b) the balloon is weightless.
(c) helium is less dense than air.
(d) helium pushes down on the air below the balloon.
Option c – helium is less dense than air
When a gas is compressed at constant temperature
(a) the speeds of the molecules decrease.
(b) the speeds of the molecules increase.
(c) the collisions between the molecules increase.
(d) the collisions between the molecules decrease.
Option c – the collisions between the molecules increase
The mass of water vapor per unit volume of air is known as
(a) relative humidity
(b) specific humidity
(c) absolute humidity
(d) variable humidity
Option c – absolute humidity
The temperature at which a solid melts to become a liquid at the atmospheric pressure is called its melting point. The melting point of a solid is an indication of
(a) the strength of the intermolecular forces of attraction.
(b) strength of the intermolecular forces of repulsion.
(d) molecular size.
Option c – molecular mass
Statement I Glass is not considered a true compound. Statement II Glass does not have a definite melting point. Codes
(a) Both the statements are individually true and statement il is the correct explanation of statement I.
(b) Both statements are individually true, but statement II is not the correct explanation of statement I.
(c) Statement I is true, but statement II is false.
(d) Statement I is false, but statement II is true.
Option a – Both the statements are individually true and statement il is the correct explanation of statement I
The unit of viscosity is
(a) poise
(b) dyne/cm
(c) joule/m²
(d) joule
Option a – poise
Which one of the following elements exists in a liquid state at room temperature?
(a) Mercury
(b) Lead
(c) Sodium
(d) Calcium
Option a – Mercury
When pure water boils vigorously, the bubbles that rise to the surface are composed primarily of
(a) air
(b) hydrogen
(c) hydrogen and oxygen
(d) water vapor
Option d – water vapor
Lowering the atmospheric pressure on a liquid ( MCQ on States of Matter Class 11 )
(a) increases the boiling point of the liquid.
(b) lowers the boiling point of the liquid.
(c) does not affect the boiling point of the liquid.
(d) increases the time required for it to boil.
Option b – lowers the boiling point of the liquid
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