Class 11 Chemistry MCQ Chapter 5 States of Matter
Are you looking for Class 11 Chemistry MCQ Chapter 5 States of Matter English Medium? Then you are in the right place. This article provides a collection of important MCQ questions with answers that will help AHSEC Higher Secondary First Year students prepare effectively for their Chemistry examinations.
The chapter States of Matter helps students understand the physical states of substances and the behavior of particles in solids, liquids, and gases. It covers important topics such as intermolecular forces, gas laws, the ideal gas equation, kinetic theory of gases, vapor pressure, and the properties of liquids and gases. These concepts are essential for understanding how matter behaves under different conditions.
The MCQs included here are prepared according to the latest AHSEC syllabus and examination pattern. They are useful for quick revision, concept strengthening, and self-assessment. By practicing these objective questions regularly, students can improve their understanding and perform better in examinations.
Whether you are preparing for class tests, annual exams, or the AHSEC HS First Year Examination, these MCQ solutions will help you revise the chapter easily and boost your confidence before the exam.
Part: I
Class 11 Chemistry MCQ Chapter 5 States of Matter
Selected VSA & MCQ
I. Very Short Answer Questions (VSA)
Q What are the three states of matter?
Ans: Solid, liquid, and gas.
Q What is an intermolecular force?
Ans: Force of attraction between molecules.
Q What is thermal energy?
Ans: Energy due to the motion of particles.
Q What is diffusion?
Ans: Mixing of particles due to random motion.
Q What is Boyle’s law?
Ans: Pressure is inversely proportional to volume at constant temperature.
Q What is Charles’s law?
Ans: Volume is directly proportional to temperature at constant pressure.
Q What is Avogadro’s law?
Ans: Equal volumes of gases have equal number of molecules at same conditions.
Q What is ideal gas equation?
Ans: (PV = nRT)
Q What is absolute temperature?
Ans: Temperature measured in Kelvin scale.
Q What is STP?
Ans: Standard temperature (273 K) and pressure (1 atm).
Q What is compressibility?
Ans: Ability to decrease volume under pressure.
Q What is viscosity?
Ans: Resistance to flow in liquids.
Q What is surface tension?
Ans: Force acting on the surface of a liquid.
Q What is vapour pressure?
Ans: Pressure exerted by vapour in equilibrium.
Q What is the boiling point?
Ans: The temperature at which vapour pressure equals atmospheric pressure.
Q What is critical temperature?
Ans: Temperature above which gas cannot be liquefied.
Q What is critical pressure?
Ans: Pressure required to liquefy gas at critical temperature.
Q What is liquefaction of gas?
Ans: Conversion of gas into liquid.
Q What is Dalton’s law?
Ans: Total pressure equals the sum of partial pressures.
Q What is partial pressure?
Ans: Pressure exerted by an individual gas.
Q What is kinetic energy?
Ans: Energy due to the motion of particles.
Q What is real gas?
Ans: Gas that deviates from ideal behavior.
Q What is ideal gas?
Ans: Gas that obeys all gas laws.
Q What is density of gas?
Ans: Mass per unit volume.
Q What is molar volume?
Ans: Volume occupied by one mole of gas.
Q What is effusion?
Ans: Flow of gas through small hole.
Q What is Graham’s law?
Ans: Rate of effusion inversely proportional to square root of molar mass.
Q What is compressibility factor?
Ans: Measure of deviation from ideal behavior.
Q What is hydrogen bonding?
Ans: Weak attraction involving hydrogen.
Q What is plasma state?
Ans: Ionised gaseous state.
II. Multiple Choice Questions (MCQs)
Q Which state has definite shape and volume?
(a) liquid
(b) gas
(c) solid
(d) plasma
Ans: (c)
Q Gases are highly:
(a) rigid
(b) compressible
(c) dense
(d) fixed
Ans: (b)
Q Boyle’s law relates:
(a) V-T
(b) P-V
(c) P-T
(d) n-T
Ans: (b)
Q Charles’s law relates:
(a) P-V
(b) V-T
(c) n-P
(d) none
Ans: (b)
Q Ideal gas equation is:
(a) PV=nRT
(b) P=nRT
(c) V=nRT
(d) none
Ans: (a)
Q STP temperature is:
(a) 0 K
(b) 273 K
(c) 100 K
(d) 300 K
Ans: (b)
Q Diffusion is fastest in:
(a) solid
(b) liquid
(c) gas
(d) plasma
Ans: (c)
Q Intermolecular forces are weakest in:
(a) solid
(b) liquid
(c) gas
(d) plasma
Ans: (c)
Q Vapour pressure increases with:
(a) temperature
(b) pressure
(c) volume
(d) mass
Ans: (a)
Q Boiling occurs when:
(a) vapour pressure = atmospheric pressure
(b) low pressure
(c) high volume
(d) none
Ans: (a)
Q Viscosity is property of:
(a) solid
(b) liquid
(c) gas
(d) plasma
Ans: (b)
Q Surface tension is due to:
(a) gravity
(b) intermolecular force
(c) pressure
(d) none
Ans: (b)
Q Dalton’s law applies to:
(a) solids
(b) liquids
(c) gases
(d) plasma
Ans: (c)
Q Partial pressure depends on:
(a) total gas
(b) individual gas
(c) volume
(d) none
Ans: (b)
Q Real gases deviate due to:
(a) no forces
(b) intermolecular forces
(c) zero volume
(d) none
Ans: (b)
Q Critical temperature means:
(a) liquefaction impossible above it
(b) possible always
(c) no relation
(d) none
Ans: (a)
Q Effusion rate depends on:
(a) mass
(b) molar mass
(c) volume
(d) none
Ans: (b)
Q Graham’s law relates to:
(a) diffusion
(b) effusion
(c) both
(d) none
Ans: (b)
Q The density of gas is:
(a) m/V
(b) V/m
(c) P/V
(d) none
Ans: (a)
Q Molar volume at STP is:
(a) 22.4 L
(b) 24 L
(c) 20 L
(d) 10 L
Ans: (a)
Q Kinetic energy depends on:
(a) temperature
(b) pressure
(c) volume
(d) none
Ans: (a)
Q Ideal gases have:
(a) no forces
(b) strong forces
(c) weak forces
(d) none
Ans: (a)
Q Compressibility is highest in:
(a) solid
(b) liquid
(c) gas
(d) plasma
Ans: (c)
Q Plasma contains:
(a) neutral atoms
(b) ions
(c) molecules
(d) solids
Ans: (b)
Q Hydrogen bonding is:
(a) strong
(b) weak
(c) ionic
(d) none
Ans: (b)
Q Gas molecules move in:
(a) fixed path
(b) random motion
(c) rest
(d) none
Ans: (b)
Q Pressure of gas due to:
(a) collisions
(b) gravity
(c) mass
(d) none
Ans: (a)
Q Compressibility factor for an ideal gas is:
(a) 0
(b) 1
(c) 2
(d) none
Ans: (b)
Q Liquids have:
(a) fixed shape
(b) fixed volume
(c) no volume
(d) none
Ans: (b)
Q Assertion: Gases are highly compressible.
Reason: Large spaces exist between gas particles.
(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
Ans: (a)
Q Assertion: Vapour pressure increases with temperature.
Reason: The kinetic energy of molecules increases.
(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
Ans: (b)
Q Assertion: Ideal gases do not exist in reality.
Reason: Intermolecular forces are present in real gases.
(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
Ans: (a)
Q Assertion: Liquids have definite volume but no fixed shape.
Reason: Intermolecular forces are moderate.
(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
Ans: (d)
Q Assertion: Surface tension decreases with increase in temperature.
Reason: Intermolecular forces weaken at higher temperature.
(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
Ans: (a)
Q Assertion: Effusion rate is inversely proportional to molar mass.
Reason: Lighter gases move faster.
(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
Ans: (c)
Q Assertion: The compressibility factor of an ideal gas is unity.
Reason: An ideal gas obeys gas laws perfectly.
(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
Ans: (b)
