11 Physicalth
Chemistry –
QUESTION BANK
(400 questions)
( Contains questions from all the chapters )
1.Calculate the number of moles present in 11 g of CO₂.
2.How many molecules are present in 3.6 g of water?
3.Calculate the mass of 2.5×10²³ molecules of NH₃.
4.Find the number of atoms in 0.1 mol of sodium.
5.Calculate the molarity of a solution containing 9.8 g of H₂SO₄ in 500 mL
solution.
6.Find the molality of a solution containing 10 g NaOH dissolved in 250 g
water.
7.Calculate the normality of 4.9 g H₂SO₄ dissolved in 250 mL solution.
8.What volume of 0.5 M HCl is required to neutralize 250 mL of 0.2 M NaOH?
9.Calculate the empirical formula of a compound containing C=40%,
H=6.67%, O=53.33%.
,10.Find the molecular formula if empirical formula is CH₂O and molar mass is
180 g/mol.
11.Calculate the percentage purity of Na₂CO₃ if 5 g sample requires 90 mL of
1 M HCl.
12.How much CaCO₃ is required to prepare 500 mL of 0.2 M solution?
13.Calculate the limiting reagent when 10 g CaCO₃ reacts with 5 g HCl.
14.Calculate the theoretical yield of CO₂ from 10 g CaCO₃.
15.Calculate the % yield if 3.3 g CO₂ is obtained from 10 g CaCO₃.
16.How many significant figures are present in 0.003040?
17.Round off 3.45678 to four significant figures.
18.Calculate the density of gas having molar mass 28 g/mol at STP.
19.Calculate RMS speed of O₂ molecules at 300 K.
20.Find average speed of N₂ molecules at 400 K.
21.Calculate most probable speed of CO₂ at 273 K.
22.Find the pressure exerted by 2 moles of gas in 10 L at 300 K.
23.Calculate volume occupied by 1 mole of gas at 27°C and 2 atm pressure.
24.A gas occupies 5 L at 300 K, find volume at 600 K (pressure constant).
25.A gas occupies 4 L at 2 atm, find volume at 1 atm (temperature constant).
26.Calculate temperature at which gas occupies 3 L if it occupies 2 L at 300
K.
27.Find pressure exerted by real gas using van der Waals equation (given
a,b).
28.Calculate compressibility factor Z for a gas if PV=2.8 and RT=3.
29.Calculate mean free path of N₂ at 1 atm and 300 K.
30.Calculate kinetic energy of 1 mole of gas at 400 K.
31.Calculate work done when 2 moles gas expands from 5 L to 10 L
isothermally.
32.Calculate ΔU when 1 mole gas heated from 300 K to 400 K (Cv=20 J/mol
K).
, 33.Find ΔH if ΔU=500 J and Δn=1 at 300 K.
34.Calculate heat required to raise temperature of 2 moles gas by 50 K
(Cp=29 J/mol K).
35.Calculate entropy change when 1 mole gas expands isothermally from 2 L
to 8 L.
36.Calculate ΔG if ΔH=-100 kJ and ΔS=-200 J/K at 300 K.
37.Find temperature at which reaction becomes spontaneous if ΔH=50 kJ and
ΔS=100 J/K.
38.Calculate efficiency of Carnot engine operating between 500 K and 300 K.
39.Calculate work done by Carnot engine absorbing 1000 J heat.
40.Calculate entropy change when 2 moles ice melts at 273 K (ΔH=6000
J/mol).
41.Calculate equilibrium constant Kp for reaction if Kc=4 and Δn=2 at 300 K.
42.Find Kc for reaction if Kp=10 and Δn=-1 at 400 K.
43.Calculate equilibrium concentration if initial concentrations and Kc are
given.
44.Find degree of dissociation of N₂O₄ if Kp=0.15 at 298 K.
45.Calculate pH of 0.01 M HCl.
46.Calculate pH of 0.001 M NaOH.
47.Find pH of buffer solution containing 0.1 M CH₃COOH and 0.1 M
CH₃COONa (Ka=1.8×10⁻⁵).
48.Calculate Ka of weak acid if pH=3 and concentration=0.1 M.
49.Find degree of ionization of weak acid (Ka=1×10⁻⁵, C=0.1 M).
50.Calculate solubility of AgCl in water (Ksp=1.8×10⁻¹⁰).
51.Find solubility of CaF₂ in 0.1 M NaF.
52.Calculate Ksp if solubility of BaSO₄ is 1×10⁻⁵ M.
53.Find pH at equivalence point of strong acid–strong base titration.
54.Calculate pH at equivalence point of weak acid–strong base titration.
55.Find pH when 25 mL 0.1 M HCl is mixed with 25 mL 0.1 M NaOH.
Chemistry –
QUESTION BANK
(400 questions)
( Contains questions from all the chapters )
1.Calculate the number of moles present in 11 g of CO₂.
2.How many molecules are present in 3.6 g of water?
3.Calculate the mass of 2.5×10²³ molecules of NH₃.
4.Find the number of atoms in 0.1 mol of sodium.
5.Calculate the molarity of a solution containing 9.8 g of H₂SO₄ in 500 mL
solution.
6.Find the molality of a solution containing 10 g NaOH dissolved in 250 g
water.
7.Calculate the normality of 4.9 g H₂SO₄ dissolved in 250 mL solution.
8.What volume of 0.5 M HCl is required to neutralize 250 mL of 0.2 M NaOH?
9.Calculate the empirical formula of a compound containing C=40%,
H=6.67%, O=53.33%.
,10.Find the molecular formula if empirical formula is CH₂O and molar mass is
180 g/mol.
11.Calculate the percentage purity of Na₂CO₃ if 5 g sample requires 90 mL of
1 M HCl.
12.How much CaCO₃ is required to prepare 500 mL of 0.2 M solution?
13.Calculate the limiting reagent when 10 g CaCO₃ reacts with 5 g HCl.
14.Calculate the theoretical yield of CO₂ from 10 g CaCO₃.
15.Calculate the % yield if 3.3 g CO₂ is obtained from 10 g CaCO₃.
16.How many significant figures are present in 0.003040?
17.Round off 3.45678 to four significant figures.
18.Calculate the density of gas having molar mass 28 g/mol at STP.
19.Calculate RMS speed of O₂ molecules at 300 K.
20.Find average speed of N₂ molecules at 400 K.
21.Calculate most probable speed of CO₂ at 273 K.
22.Find the pressure exerted by 2 moles of gas in 10 L at 300 K.
23.Calculate volume occupied by 1 mole of gas at 27°C and 2 atm pressure.
24.A gas occupies 5 L at 300 K, find volume at 600 K (pressure constant).
25.A gas occupies 4 L at 2 atm, find volume at 1 atm (temperature constant).
26.Calculate temperature at which gas occupies 3 L if it occupies 2 L at 300
K.
27.Find pressure exerted by real gas using van der Waals equation (given
a,b).
28.Calculate compressibility factor Z for a gas if PV=2.8 and RT=3.
29.Calculate mean free path of N₂ at 1 atm and 300 K.
30.Calculate kinetic energy of 1 mole of gas at 400 K.
31.Calculate work done when 2 moles gas expands from 5 L to 10 L
isothermally.
32.Calculate ΔU when 1 mole gas heated from 300 K to 400 K (Cv=20 J/mol
K).
, 33.Find ΔH if ΔU=500 J and Δn=1 at 300 K.
34.Calculate heat required to raise temperature of 2 moles gas by 50 K
(Cp=29 J/mol K).
35.Calculate entropy change when 1 mole gas expands isothermally from 2 L
to 8 L.
36.Calculate ΔG if ΔH=-100 kJ and ΔS=-200 J/K at 300 K.
37.Find temperature at which reaction becomes spontaneous if ΔH=50 kJ and
ΔS=100 J/K.
38.Calculate efficiency of Carnot engine operating between 500 K and 300 K.
39.Calculate work done by Carnot engine absorbing 1000 J heat.
40.Calculate entropy change when 2 moles ice melts at 273 K (ΔH=6000
J/mol).
41.Calculate equilibrium constant Kp for reaction if Kc=4 and Δn=2 at 300 K.
42.Find Kc for reaction if Kp=10 and Δn=-1 at 400 K.
43.Calculate equilibrium concentration if initial concentrations and Kc are
given.
44.Find degree of dissociation of N₂O₄ if Kp=0.15 at 298 K.
45.Calculate pH of 0.01 M HCl.
46.Calculate pH of 0.001 M NaOH.
47.Find pH of buffer solution containing 0.1 M CH₃COOH and 0.1 M
CH₃COONa (Ka=1.8×10⁻⁵).
48.Calculate Ka of weak acid if pH=3 and concentration=0.1 M.
49.Find degree of ionization of weak acid (Ka=1×10⁻⁵, C=0.1 M).
50.Calculate solubility of AgCl in water (Ksp=1.8×10⁻¹⁰).
51.Find solubility of CaF₂ in 0.1 M NaF.
52.Calculate Ksp if solubility of BaSO₄ is 1×10⁻⁵ M.
53.Find pH at equivalence point of strong acid–strong base titration.
54.Calculate pH at equivalence point of weak acid–strong base titration.
55.Find pH when 25 mL 0.1 M HCl is mixed with 25 mL 0.1 M NaOH.
