CBSE MCQ Questions for Class 11 Chemistry Chapter 5 States of Matter with Answers Pdf free download. MCQ Questions for Class 11 Chemistry with Answers were prepared based on the latest exam pattern. This MCQ will help you score good marks in the final exam. States of Matter Class 11 Chemistry MCQs are prepared for a better understanding of the concept. States of Matter Class 11 Chemistry MCQ is prepared by Experts of CBSE.
Class 11 Chemistry Chapter 5 States of Matter MCQs
Check the multiple-choice questions for the 11th Class Chemistry Chapter 5 States of Matter. Select one answer out of 4 options.
States of Matter Class 11 MCQs Questions with Answers
A gas diffuses 1/5 times as fast as hydrogen. Its molar mass is
(a) 25
(b) 50
(c) 25√2
(d) 50√2
Answer: (b) 50
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) Charle’s law
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) 282.68 g
The rate of diffusion of methane is twice that of X. The molecular mass of X is
(a) 64.0
(b) 32.0
(c) 40
(d) 80
Answer: (a) 64.0
The volume of 2.8 g of carbon monoxide at 27°C and 0.0821 atm is
(a) 30 L
(b) 3 L
(c) 0.3 L
(d) 1.5 L
Answer: (a) 30 L
The interaction energy of London force is inversely proportional to sixth power of the distance between two interacting particles but their magnitude depends upon
(a) charge of interacting particles
(b) mass of interacting particles
(c) polarisability of interacting particles
(d) strength of permanent dipoles in the particles.\
Answer: (c) polarisability of interacting particles
The vapour pressure of water at 300 K in a closed container is 0.4 atm. If the volume of container is doubled, its vapour pressure at 300 K will be
(a) 0.8 atm
(b) 0.2 atm
(c) 0.4 atm
(d) 0.6 atm
Answer: (c) 0.4 atm
The density of a gas is 4 times that of Y. If the molar mass M, that of Y is
(a) 2M
(b) M/2
(c) 4M
(d) M/4
Answer: (d) M/4
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) P/RT
If r.m.s. speed of gaseous molecules is x cm sec-1 at a pressure of p atm, then r.m.s. speed at a pressure of 2p atm and constant pressure will be
(a) x
(b) 2x
(c) 4x
(d) x/4
Answer: (a) x
Which of the following statement is wrong for gases?
(a) Gases do not have definite shape and volume
(b) Volume of the gas is equal to the volume of the container confining the gas
(c) Confined gas exert uniform pressure on the wall of the container in all directions
(d) Mass of the gas cannot be determined by weighing a container in which it is contained
Answer: (d) Mass of the gas cannot be determined by weighing a container in which it is contained
The pressure of 2 moles of an ideal gas at 273°C occupying a volume of 44.8 L is
(a) 2 atm
(b) 1 atm
(c) 3 atm
(d) 4 atm
Answer: (a) 2 atm
Strength of the hydrogen bond is determined by interaction between the
I. lone pair of the electronegative atom and the hydrogen atom of other atom.
II. bond pair of the electronegative atom and the hydrogen atom of other atom.
Identify the correct option.
(a) Only I is correct
(b) Only II is correct
(c) Both I and II are correct
(d) Neither I nor II are correct
Answer: (a) Only I is correct
The critical volumes of four gases A, B, C, D are respectively 0.025 L, 0.312 L, 0.245 L, 0.432 L, the gas with highest value of van der Wall constant b is
(a) A
(b) B
(c) C
(d) D
Answer: (d) D
What is the molar mass of C gas whose density is 1.5 g L-1 at 27°C and 1 atm pressure [R = 0.08 L atm K-1 mol-1].
(a) 360
(b) 720
(c) 36
(d) 18
Answer: (c) 36
Containers A and B have same gas. Pressure, volume and temperature of A are all twice those of B. The ratio of number of molecules of A and B is
(a) 1 : 2
(b) 2 : 1
(c) 1 : 4
(d) 4 : 1
Answer: (b) 2 : 1
The density of neon will be highest at
(a) STP
(b) 0°C and 2 atm
(c) 273°C, 1 atm
(d) 273°C, 0.5 atm
Answer: (b) 0°C and 2 atm
At 25 degrees celsius and 730 mm pressure, 380 ml of dry oxygen was collected. If the temperature is constant, what volume will oxygen occupy at 760 mm pressure?
(a) 365 ml
(b) 449 ml
(c) 569 ml
(d) 621 ml
Answer: (a) 365 ml
The term which accounts for intermolecular forces in a van der Waal equation is:
(a) (V – b)
(b) (RT)-1
(c) (P + a/V2)
(d) RT
Answer: (c) (P + a/V2)
Which of the following exhibits the weakest molecular forces?
(a) NH3
(b) HCl
(c) He
(d) H2O
Answer: (c) He
Equal masses of ethane and hydrogen are mixed in an empty container at 25°C . The fraction of total pressure exerted by hydrogen is
(a) 1 : 2
(b) 1 : 1
(c) 01 : 16
(d) 15 : 16
Answer: (d) 15 : 16
If 20cm³ gas at 1 atm. is expanded to 50 cm³ at constant T, then what is the final pressure
(a) 20 × 150
(b) 50 × 120
(c) 1 × 120 × 50
(d) None of these
Answer: (a) 20 × 150
How many of the know elements exist as gases at 25°C?
(a) 9
(b) 11
(c) 12
(d) 15
Answer: (b) 11
Dominance of strong repulsive forces among the molecule of the gas:
(a) depends on Z and indicates that Z = 1
(b) depends on Z and indicates that Z > 1
(c) depends on Z and indicates that Z<1
(d) is independent of Z
Answer: (b) depends on Z and indicates that Z > 1
If the pressure of a gas is increased then its mean free path becomes:
(a) 0
(b) Less
(c) More
(d) Infinity
Answer: (b) Less
According to kinetic theory of gases, in an ideal gas, between two successive collisions a gas molecule travels
(a) In a circular path
(b) In a wavy path
(c) In a straight line path
(d) With an accelerated velocity
Answer: (c) In a straight line path
Three containers A, B, C of equal volume contain oxygen, neon and methane respectively at same temperature and pressure. The increasing order of their masses is
(a) A < B < C
(b) B < C < A
(c) C < A < B
(d) C < B < A
Answer: (d) C < B < A
Standard conditions are
(a) 0°C and 14. 7mm
(b) 32°F and 76 cm
(c) 273°C and 760 mm
(d) 4°C and 76 m
Answer: (b) 32°F and 76 cm
Steam distillation is based on
(a) Boyle’s Law
(b) Charle’s Law
(c) Dalton’s Law of partial pressures
(d) Avogadro’s Law
Answer: (c) Dalton’s Law of partial pressures
At STP the density of nitrogen monoxide is
(a) 3.0 g L-1
(b) 30 gL-1
(c) 1.34 g L-1
(d) 2.68 gL-1
Answer: (c) 1.34 g L-1
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) 6, 4
Pressure of 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) 31.2015 atm
(c) 45.215 atm
(d) 15.210 atm
Answer: (a) 25.215 atm1
Equal masses of methane and oxygen are mixed in an empty container at 25°C. The fraction of the total pressure exerted by oxygen is
(a) 1/2
(b) 2/3
(c) 1/2 × 273/298
(d) 1/3
Answer: (d) 1/3
Triple point of water is
(a) 273 K
(b) 373 K
(c) 203 K
(d) 193 K
Answer: (a) 273 K
Falling drop of water is spherical due to:
(a) Hydrogen Bonding
(b) Surface Tension
(c) Capillary Action
(d) Viscosity
Answer: (b) Surface Tension