MCQs For NCERT Class 11 Chemistry Chapter 5 States of Matter

MCQs Class 11

Please refer to the MCQ Questions for Class 11 Chemistry Chapter 5 States of Matter with Answers. The following States of Matter Class 11 Chemistry MCQ Questions have been designed based on the latest syllabus and examination pattern for Class 11. Our experts have designed MCQ Questions for Class 11 Chemistry with Answers for all chapters in your NCERT Class 11 Chemistry book.

States of Matter Class 11 MCQ Questions with Answers

See below States of Matter Class 11 Chemistry MCQ Questions, solve the questions and compare your answers with the solutions provided below.

Question. Which of the following is true about gaseous state ?
(a) Thermal energy = Molecular attraction
(b) Thermal energy >> Molecular attraction
(c) Thermal energy << Molecular attraction
(d) Molecular force >> Those in liquids

Answer

B

Question. The first reliable measurement on properties of gases was made by _____________
(a) Gay Lussac
(b) Jacques charles
(c) Robert Boyle
(d) Avogadro

Answer

C

Question. At constant temperature, for a given mass of an ideal gas
(a) the ratio of pressure and volume always remainsconstant. 
(b) volume always remains constant.
(c) pressure always remains constant.
(d) the product of pressure and volume always remains constant.

Answer

D

Question. Which of the following is the correct order of thermal energy in three states of matter ?
(a) Solid < Liquid < Gas
(b) Liquid < Gas < Solid
(c) Liquid < Solid < Gas
(d) Gas < Solid < Liquid

Answer

A

Question. Which one of the following statements is not correct about the three states of matter i.e., solid, liquid and gaseous ?
(a) Molecules of a solid possess least energy whereas those of a gas possess highest energy.
(b) The density of solid is highest whereas that of gases is lowest
(c) Gases like liquids possess definite volumes
(d) Molecules of a solid possess vibratory motion

Answer

C

Question. Boyle’s law states that the
(a) pressure of a gas is directly proportional to the temperature at constant volume
(b) pressure of a gas is inversely proportional the volume at constant temperature
(c) volume is directly proportional to the temperature at constant pressure
(d) None of the above

Answer

B

Question. 500 ml of nitrogen at 27°C is cooled to –5°C at the same pressure. The new volume becomes
(a) 326.32 ml
(b) 446.66 ml
(c) 546.32 ml
(d) 771.56 ml

Answer

B

Question. Air at sea level is dense. This is a practical application of
(a) Boyle’s law
(b) Charle’s law
(c) Kelvin’s law
(d) Brown’s law

Answer

A

Question. Use of hot air balloons in sports and meteorological observations is an application of
(a) Boyle’s law
(b) Charle’s law
(c) Kelvin’s law
(d) Gay-Lussac’s law

Answer

B

Question. On a ship sailing in pacific ocean where temperature is 23.4°C, a balloon is filled with 2 L air. What will be the volume of the balloon when the ship reaches Indian ocean, wheretemperature is 26.1°C ?
(a) 2.018 L
(b) 2.8 L
(c) 3.5 L
(d) 1.5 L

Answer

A

Question. Which of the following represents Avogadro law ?
(a) V = kn
(b) V = k m/M
(c) M = kd
(d) All of these

Answer

D

Question. 600 c.c. of a gas at a pressure of 750 mm of Hg is compressed to 500 c.c. Taking the temperature to remain constant, the increase in pressure, is
(a) 150 mm of Hg
(b) 250 mm of Hg
(c) 350 mm of Hg
(d) 450 mm of Hg

Answer

A

Question. The lowest hypothetical or imaginary temperature at which gases are supposed to occupy zero volume is called _________
(a) Kelvin temperature
(b) absolute zero
(c) Charle’s temperature
(d) constant temperature

Answer

B

Question. At STP molar volume of an ideal gas or a combination of ideal gases is ___________
(a) 22.71098 L mol–1
(b) 20.71098 L mol–1
(c) 22.4139 L mol–1
(d) 24.78 L mol–1

Answer

A

Question. For an ideal gas, number of moles per litre in terms of its pressure P, gas constant R and temperature T is
(a) PT/R
(b) PRT
(c) P/RT
(d) RT/P

Answer

C

Question. Select one correct statement. In the gas equation, PV = nRT
(a) n is the number of molecules of a gas
(b) V denotes volume of one mole of the gas
(c) n moles of the gas have a volume V
(d) P is the pressure of the gas when only one mole of gas is present.

Answer

C

Question. The correct value of the gas constant ‘R’ is close to :
(a) 0.082 litre-atmosphere K
(b) 0.082 litre-atmosphere K–1 mol–1
(c) 0.082 litre – atmosphere–1 K mol–1
(d) 0.082 litre –1 atmosphere – 1 K mol

Answer

B

Question. Pure hydrogen sulphide is stored in a tank of 100 litre capacity at 20° C and 2 atm pressure. The mass of the gas will be
(a) 34 g
(b) 340 g
(c) 282.68 g
(d) 28.24 g

Answer

C

Question. At N.T.P the volume of a gas is found to be 273 ml. What will be the volume of this gas at 600 mm of Hg and 273°C?
(a) 391.8 ml
(b) 380 ml
(c) 691.6 ml
(d) 750 ml

Answer

C

Question. 4.4 g of a gas at STP occupies a volume of 2.24 L, the gas can be
(a) O2
(b) CO
(c) NO2
(d) CO2

Answer

D

Question. An ideal gas is one which obeys the gas laws under
(a) a few selected experimental conditions
(b) all experimental conditions
(c) low pressure alone
(d) high temperature alone

Answer

B

Question. Pressure of a mixture of 4 g of O2 and 2 g of H2 confined in a bulb of 1 litre at 0°C is
(a) 25.215 atm
(b) 31.205 atm
(c) 45.215 atm
(d) 15.210 atm

Answer

A

Question. Dalton’s law of partial pressure will not apply to which of the following mixture of gases
(a) H2 and SO2
(b) H2 and Cl2
(c) H2 and CO2
(d) CO2 and Cl2

Answer

B

Question. Pressure exerted by saturated water vapour is called _____________
(a) Aqueous tension
(b) Partial pressure
(c) Total pressure
(d) Both (a) and (b)

Answer

A

Question. The pressure exerted by 6.0g of methane gas in a 0.03 m3 vessel at 129°C is (Atomic masses : C = 12.01, H = 1.01 and R = 8.314 JK–1 mol –1)
(a) 31684 Pa
(b) 215216 Pa
(c) 13409 Pa
(d) 41648 Pa

Answer

D

Question. A gaseous mixture was prepared by taking equal mole of CO and N2. If the total pressure of the mixture was found 1 atmosphere, the partial pressure of the nitrogen (N2) in the mixture is
(a) 0.5 atm
(b) 0.8 atm
(c) 0.9 atm
(d) 1 atm

Answer

A

Question. A bubble of air is underwater at temperature 15°C and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is 25°C and the pressure is 1.0 bar, what will happen to the volume of the bubble ?
(a) Volume will become greater by a factor of 1.6.
(b) Volume will become greater by a factor of 1.1.
(c ) Volume will become smaller by a factor of 0.70.
(d) Volume will become greater by a factor of 2.5.

Answer

A

Question. A mixture contains 64 g of dioxygen and 60 g of neon at a total pressure of 10 bar. The partial pressures in bar of ioxygen and neon are respectively (atomic masses O = 16,
Ne = 20) A
(a) 4 and 6
(b) 6 and 4
(c) 5 and 5
(d) 8 and 2

Answer

A

Question. Gas equation PV = nRT is obeyed by
(a) Only isothermal process
(b) Only adiabatic process
(c) Both (a) and (b)
(d) None of these

Answer

C

Question. The total pressure of a mixture of two gases is :
(a) the sum of the partial pressures
(b) the difference between the partial pressures
(c) the product of the partial pressures
(d) the ratio of the partial pressures

Answer

A

Question. 500 mL of air at 760 mm pressure were compressed to 200 mL. If the temperature remains constant, what will be the pressure after compression?
(a) 1800 mm
(b) 1900 mm
(c) 2000 mm
(d) 1500 mm

Answer

B

Question. Value of universal gas constant (R) depends upon
(a) Number of moles of gas
(b) Volume of gas
(c) Temperature of gas
(d) None of these

Answer

D

Question. 56 g of nitrogen and 96 g of oxygen are mixed isothermally and at a total pressure of 10 atm. The partial pressures of oxygen and nitrogen (in atm) are respectively
(a) 4, 6
(b) 5, 5
(c) 2, 8
(d) 6, 4

Answer

D

Question. According to the kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels
(a) in a wavy path
(b) in a straight line path
(c) with an accelerated velocity
(d) in a circular path

Answer

B

Question. If there were loss of kinetic energy, the motion of gas molecules will _____A _______ and gas will ____B______.
(a) A = increase, B = collide
(b) A = stop, B = settle down
(c) A = increase, B = exert more pressure on walls of container
(d) A = decrease, B = get liquified

Answer

B

Question. Which of the following assumption of kinetic molecular theory states that gases do not have fixed shape ?
(a) Particles of a gas move in all possible directions in straight line.
(b) Particles of a gas are always in constant and random motion.
(c) Total energy of molecules before and after the collision remains same.
(d) None of these

Answer

B

Question. Kinetic theory of gases proves
(a) only Boyle’s law
(b) only Charles’ law
(c) only Avogadro’s law
(d) All of these

Answer

D

Question. If 10–4 dm3 of water is introduced into a 1.0 dm3 flask at 300 K, how many moles of water are in the vapour phase when equilibrium is established ?
 Given : Vapour pressure of H2O at 300 K is 3170 Pa; R = 8.314 J K–1 mol–1)
(a) 5.56× 10–3 mol
(b) 1.53 × 10–2 mol
(c) 4.46 × 10–2 mol
(d) 1.27 × 10–3 mol

Answer

D

Question. The total pressure of a mixture of two gases is
(a) the sum of the partial pressures
(b) the difference between the partial pressures
(c) the product of the partial pressures
(d) the ratio of the partial pressures

Answer

A

Question. Which one of the following is the wrong assumption of kinetic theory of gases ?
(a) Momentum and energy always remain conserved.
(b) Pressure is the result of elastic collision of molecules with the container’s wall.
(c) Molecules are separated by great distances comparedto their sizes. 
(d) All the molecules move in straight line between collision and with same velocity.

Answer

D

Question. When is deviation more in the behaviour of a gas from the ideal gas equation PV = nRT ?
(a) At high temperature and low pressure
(b) At low temperature and high pressure
(c) At high temperature and high pressure
(d) At low temperature and low pressure

Answer

B

Question. In van der Waal’s equation of state of the gas law, theconstant ‘b’ is a measure of
(a) volume occupied by the molecules
(b) intermolecular attraction
(c) intermolecular repulsions
(d) intermolecular collisions per unit volume

Answer

A

Question. The values of van der Waal’s constant ‘a’ for the gases O2, N2, NH3 and CH4 are 1.360, 1.390, 4.170 and 2.253 L2 atm mol–2 respectively. The gas which can most easily be iquified is
(a) O2
(b) N2
(c) NH3
(d) CH4

Answer

C

Question. The van der Waal’s constant ‘a’ for four gases P, Q, R and S are 4.17, 3.59, 6.71 and 3.8 atm L2 mol–2 respectively. Therefore, the ascending order of their liquefaction is
(a) R < P < S < Q
(b) Q < S < R < P
(c) Q < S < P < R
(d) R < P < Q < S

Answer

C

Question. The gas with the highest critical temperature is
(a) H2
(b) He
(c) N2
(d) CO2

Answer

D

Question. A gas is said to behave like an ideal gas when the relation PV/T = constant. When do you expect a real gas to behave like an ideal gas ?
(a) When the temperature is low
(b) When both the temperature and pressure are low
(c) When both the temperature and pressure are high
(d) When the temperature is high and pressure is low

Answer

D

Question. An ideal gas can’t be liquefied because
(a) its critical temperature is always above 0°C
(b) Its molecules are relatively smaller in size
(c) it solidifies before becoming a liquid
(d) forces between its molecules are negligible

Answer

D

Question. Above Boyle point, real gases show ______X______ from ideality and Z values are _______Y_______ than one.
(a) X = Negative deviation, Y = Less
(b) X = Negative deviation, Y = Greater
(c) X = Positive deviation, Y = Less
(d) X = Positive deviation, Y = Greater

Answer

D

Question. A gas described by van der Waal’s equation
(i) behaves similar to an ideal gas in the limit of large molar volume
(ii) behaves similar to an ideal gas in the limit of large pressure
(iii) is characterised by van der Waal’s coefficients that are dependent on the identity of the gas but are independent of the temperature
(iv) has the pressure that is lower than the pressure exerted by the same gas behaving ideally
(a) (i) and (ii)
(b) (i) and (iii)
(c) (i), (ii) and (iii)
(d) (ii) and (iv)

Answer

B

Question. The units of constant a in van der Waal’s equation is
(a) dm6 atm mol–2
(b) dm3 atm mol–1
(c) dm atm mol–1
(d) atm mol–1

Answer

A

States of Matter Class 11 Chemistry MCQ Questions