250 MCQs from
Class 11 Physical
Chemistry
Below is a SET OF 250 PYQ-STYLE MCQs from
Class 11 Physical Chemistry, strictly chapter-
wise coverage, exam-oriented (JEE/NEET)
1.The number of significant figures in 0.002030 is
(A)2 (B)3 (C)4 (D)5
2.The molarity of pure water is approximately (A)18
(B)55.5 (C)100 (D)1
3.Empirical formula mass is always (A)≥ molecular
mass (B)= molecular mass (C)≤ molecular mass
(D)unrelated
4.One mole of an ideal gas at STP occupies (A)22.4
L (B)11.2 L (C)44.8 L (D)24 L
,5.Vapour density of a gas is 16. Its molecular mass
is (A)8 (B)16 (C)32 (D)64
6.Limiting reagent is the reactant which (A)is in
excess (B)forms maximum product (C)limits
product formation (D)reacts last
7.A solution having 1 mole solute in 1 kg solvent
has molality (A)1 M (B)1 N (C)1 m (D)1%
8.Normality of 1 M H₂SO₄ is (A)0.5 (B)1 (C)2 (D)4
9.Percentage error is minimum when significant
figures are (A)less (B)more (C)equal (D)zero
10.The SI unit of amount of substance is (A)gram
(B)mole (C)kg (D)amu
11.Real gases deviate most from ideal behavior at
(A)high T low P (B)low T high P (C)high T high P
(D)low T low P
12.Compressibility factor Z for ideal gas is (A)0
(B)1 (C)>1 (D)<1
13.RMS speed of gas molecules depends on
(A)pressure only (B)temperature only (C)molar
mass only (D)T and M
14.At constant temperature, PV vs P graph for real
gas is (A)straight line (B)parabola (C)hyperbola
(D)sigmoid
, 15.van der Waals constant ‘a’ accounts for
(A)volume (B)pressure (C)attraction (D)repulsion
16.Critical temperature is temperature above
which gas (A)solidifies (B)liquefies easily (C)cannot
be liquefied (D)becomes ideal
17.Average kinetic energy of gas molecules is
proportional to (A)pressure (B)volume
(C)temperature (D)molar mass
18.Work done in free expansion of gas is
(A)positive (B)negative (C)zero (D)maximum
19.For isothermal process of ideal gas ΔU is
(A)positive (B)negative (C)zero (D)maximum
20.Enthalpy change equals internal energy change
when Δn(g) is (A)0 (B)1 (C)–1 (D)2
21.Unit of entropy is (A)J (B)J mol⁻¹ (C)J K⁻¹ (D)J
mol⁻¹ K⁻¹
22.For spontaneous process ΔG should be (A)+ve
(B)–ve (C)0 (D)maximum
23.At equilibrium ΔG is (A)positive (B)negative
(C)zero (D)infinite
24.Carnot engine efficiency depends on (A)working
substance (B)pressure (C)temperature (D)volume
Class 11 Physical
Chemistry
Below is a SET OF 250 PYQ-STYLE MCQs from
Class 11 Physical Chemistry, strictly chapter-
wise coverage, exam-oriented (JEE/NEET)
1.The number of significant figures in 0.002030 is
(A)2 (B)3 (C)4 (D)5
2.The molarity of pure water is approximately (A)18
(B)55.5 (C)100 (D)1
3.Empirical formula mass is always (A)≥ molecular
mass (B)= molecular mass (C)≤ molecular mass
(D)unrelated
4.One mole of an ideal gas at STP occupies (A)22.4
L (B)11.2 L (C)44.8 L (D)24 L
,5.Vapour density of a gas is 16. Its molecular mass
is (A)8 (B)16 (C)32 (D)64
6.Limiting reagent is the reactant which (A)is in
excess (B)forms maximum product (C)limits
product formation (D)reacts last
7.A solution having 1 mole solute in 1 kg solvent
has molality (A)1 M (B)1 N (C)1 m (D)1%
8.Normality of 1 M H₂SO₄ is (A)0.5 (B)1 (C)2 (D)4
9.Percentage error is minimum when significant
figures are (A)less (B)more (C)equal (D)zero
10.The SI unit of amount of substance is (A)gram
(B)mole (C)kg (D)amu
11.Real gases deviate most from ideal behavior at
(A)high T low P (B)low T high P (C)high T high P
(D)low T low P
12.Compressibility factor Z for ideal gas is (A)0
(B)1 (C)>1 (D)<1
13.RMS speed of gas molecules depends on
(A)pressure only (B)temperature only (C)molar
mass only (D)T and M
14.At constant temperature, PV vs P graph for real
gas is (A)straight line (B)parabola (C)hyperbola
(D)sigmoid
, 15.van der Waals constant ‘a’ accounts for
(A)volume (B)pressure (C)attraction (D)repulsion
16.Critical temperature is temperature above
which gas (A)solidifies (B)liquefies easily (C)cannot
be liquefied (D)becomes ideal
17.Average kinetic energy of gas molecules is
proportional to (A)pressure (B)volume
(C)temperature (D)molar mass
18.Work done in free expansion of gas is
(A)positive (B)negative (C)zero (D)maximum
19.For isothermal process of ideal gas ΔU is
(A)positive (B)negative (C)zero (D)maximum
20.Enthalpy change equals internal energy change
when Δn(g) is (A)0 (B)1 (C)–1 (D)2
21.Unit of entropy is (A)J (B)J mol⁻¹ (C)J K⁻¹ (D)J
mol⁻¹ K⁻¹
22.For spontaneous process ΔG should be (A)+ve
(B)–ve (C)0 (D)maximum
23.At equilibrium ΔG is (A)positive (B)negative
(C)zero (D)infinite
24.Carnot engine efficiency depends on (A)working
substance (B)pressure (C)temperature (D)volume
