Chemical Equilibrium ONLINE MCQ TEST

This Quiz is a Simple test for +2 Science group students which contain Questions asked from  Chemical Equilibrium . Just participate in it and test your skill. 💗💗💗💗💗💗💗

Set- 1       Set -2      Set- 3       Set -4        Set- 5       Set -6         Set-7       Set -8       Set- 9       Set -10

Set -1

1. 2H2O(g) +  2Cl2(g) ⇌ 4HCl(g) +  5O2(g), the value of Kp and Kc , the value of Kp and Kc are related as
Kp = Kc
Kp > Kc
Kp < Kc
Kp = Kc = 0


2. For a homogenous gaseous reaction at 600 K 4NH3(g) + 5O2(g) ⇌ 4NO(g) + 6H2O(g) the
(mol dm–3)–1
mol dm–3
(mol dm–3)4
(mol dm–3)–2


3. In an endothermic equilibrium reaction, if K1 and K2 are the equilibrium constants at T1 and T2
K1 < K2
K1> K2
K1 = K2
None


4. Forward reaction takes place, when
Q < Kc
Q > Kc
Q = Kc
Kc = 1/Q


5. H2(g) + I2(g) ⇌ 2HI(g) The equilibrium constant Kc for this reaction is 16. Kp value is
1 / 16
4
64
16


6. If the equilibrium constant for the formation of a product is 25, the equilibrium constant for
25
1 / 25
5
625


7. If the equilibrium constants of the following reactions 2A ⇌ B is K1 and B ⇌ 2A is K2, then
K1 = 2K2
K1 = 1 / K2
K2 = (K1)2
K1 = 1 / K22


8. In a reaction 2O3  ⇌ 3O2 the value of Kc is
[O3]3 / [O2]2
[O2]2 / [O3]3
[O2]3 / [O3]2
[O3] / [O2]


9. In the equilibrium N2 + 3H2 ⇌ 2NH3, the maximum yield of ammonia will be obtained with the pro
low pressure and high temperature
low pressure and low temperature
high temperature and high pressure
high pressure and low temperature


10. In the Haber process the yield of ammonia is greater
at high pressure
at low pressure
at high temperature
in absence of catalyst


11. In the reversible reaction 2HI(g) ⇌ H2(g) + I2(g), Kp  is
greater than Kc
less than Kc
equal to Kc
0 / zero


12. In the synthesis of NH3 between N2 and H2 reaction the unit of Kc is
lit2 mol–2
atm–2
lit atm–1
atm– l


13. State of a chemical equilibrium is
dynamic
stationary
both (a) and (b)
none of these


14. The equilibrium constant for the reaction 2A ⇌ B is 25 mol–1 dm3 at 900 K. What is the equilibrium constant for the reaction B ⇌ 2A in dm–3 mol at the same temperature?
25
625
0.04
0.4


15. The fraction of total moles of reactant dissociated is called
dissociation equilibrium
degree of association
degree of dissociation
dissociation constant


16. The maximum yield of ammonia by Haber’s process is
78%
97%
37%
89%


17. The optimum temperature used in contact process for the manufacture of SO3 is
400°C to 450°C
1800°C to 2700°C
500°C to 550°C
350°C to 450°C


18. The rate constant of the forward and reverse reactions are 8 x 10–5 and 2 x 10–4 respectively.
0.04
0.02
0.2
0.4


19. The relationship between Kp and Kc for the equilibrium 2H2O(g) + 2Cl2(g) ⇌ 4HCl(g) + O2(g)is
Kp = Kc
Kp = Kc(RT)2
Kp = Kc(RT)1
Kp = Kc(RT)–2


20. Two moles of ammonia gas are introduced into a previously evacuated 1.0 dm3 vessel in which it partially dissociates at high temperature. At equilibrium 1.0 mole of ammonia remains. The equilibrium constant Kc for the dissociation is
27 / 16 (mole dm–3)2
27 / 8 (mole dm–3)2
27 / 4 (mole dm–3)2
none of these


21. When Δng in a homogenous gaseous equilibrium is positive, then / If Δng is positive
Kp = Kc
Kp > Kc
Kc > Kp
Kp = 2Kc


22. Which of the following gaseous equilibria is favoured by increase in temperature?
N2O4 ⇌ 2NO2; ΔH = + 59 kJ mol–1
N2 + 3H2 ⇌ 2NH3; ΔH = – 22 kcalmol–1
2SO2 + O2 ⇌ 2SO3; ΔH = – 47 k cal mol–1
Both (b) and (c)


23. Which one of the following has negative value for Δng?
H2(g) + I2(g) ⇌ 2HI(g)
PCl5(g) ⇌ PCl3(g) + Cl2(g)
3H2(g) + N2(g) ⇌ 2NH3(g)
2H2O(g) + 2Cl2(g) ⇌ 4HCl(g) + O2(g)


24. In an equilibrium reaction, when Q < Kc then
forward reaction is favoured
reverse reaction is favoured
both forward and reverse reaction are favoured
none of these


25. In which of the following gaseous reaction Kp < Kc?
PCl5(g) ⇌ PCl3(g) + Cl2(g)
H2(g) + I2(g) ⇌ 2HI(g)
N2(g) + 3H2(g) ⇌ 2NH3(g)
CO(g) + H2O(g) ⇌ CO2(g) + H2(g)


26. In the formation of HI from H2 and I2, Kp = Kc  because
Δng = 2
Δng = 1
Δng = 0
Δng = –1


27. Presence of moisture in contact process
activates the catalyst
deactivates the catalyst
increases the product
makes the catalyst porous


28. The maximum yield of SO3 in contact process is
97%
37%
50%
47%


29. The mole ratio of SO2 and O2 in contact process is
1 : 2
2 : 1
3 : 1
1 : 3


30. For the Equilibrium PCl5(g) ⇌ PCl3(g) + Cl2(g) the factor that favours the reverse reaction is
Increase in concentration of PCl5
Increase in concentration of Cl2
No change in concentration of Cl2
Decrease in concentration of Cl2


31. The pressure required to get maximum yield of Ammonia by Haber's process
300 - 500 atm
500 - 700 atm
700 - 1200 atm 
100 - 300 atm

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Thermodynamics ONLINE MCQ TEST

This Quiz is a Simple test for +2 Science group students which contain Questions asked from  Thermodynamics . Just participate in it and test your skill. 💗💗💗💗💗💗💗

Set- 1       Set -2      Set- 3       Set -4        Set- 5       Set -6         Set-7       Set -8       Set- 9       Set -10

Set -1

1. According to Trouton's rule, the value of change in entropy of vaporization is
21 cal. deg–1 mole–1
12 cal. deg– 1 mol
21 kcal. deg. mole–1
12 kcal. deg. mol–1


2. All the naturally occurring processes proceed spontaneously in a direction which leads to
decrease of entropy
increase in enthalpy
increase in free energy
decrease of free energy


3. Change in Gibbs free energy is given by
ΔG = ΔH + TΔS
ΔG = ΔH – TΔS
ΔG = ΔH x TΔS
ΔG = TΔS – ΔH


4. Entropy (S) and the entropy change (ΔS) of a process
are path functions
are state functions
are constants
have no values


5. Entropy is a ___________ function
state
path
exact
inexact


6. For the reaction 2Cl(g) → Cl2(g), the signs of ΔH and ΔS are respectively
+, –
+, +
–, –
–, +


7. Free energy (G) and the free energy change (ΔG) correspond to the
system only
surrounding only
system and surrounding
all of these


8. H2O(l) → H2O(g), In this process the entropy
remains constant
decreases
increases
becomes zero


9. If ΔG for a reaction is negative, the change is
spontaneous
non-spontaneous
reversible
equilibrium


10. In an adiabatic process which of the following is correct?
q = w 
q = 0
ΔE = q
PΔV = 0


11. In SI unit 1 eu is
41.84 EU
4.184 EU
418.4 EU 
4184 EU


12. In which of the process is always non-feasible?
ΔH > O, ΔS > O
ΔH < O, ΔS > O 
ΔH > O, ΔS < O
ΔH < O, ΔS < O


13. Standard free energies of formation of elements are taken as
positive
negative
zero
all of these


14. The amount of heat exchanged with the surrounding at constant temperature and pressure is called
ΔE
ΔH
ΔS
ΔG


15. The amount of heat exchanged with the surroundings at constant pressure is called
ΔE
ΔH
ΔS
ΔG


16. The entropy change (ΔS(fusion)) involved in the process of H2O(s) → H2O(l) at 0°C and 1 atm pressure involving ΔH(fusion) = 6008 Jmol^–1 is
22.007 Jmol–1 K–1
22.007 Jmol K–1
220.07 Jmol–1 K–1
2.2007 Jmol–1 K–1


17. The entropy change involved in the process water (liq) to water (vapor, 373K) involving ΔHvap =
10.952 J mol–1 K–1
109.52 J mol–1 K–1
100.952 J mol–1 K–1 
1095.2 J mol–1 K–1


18. The network obtained from a system is given by
w – PΔV
w + PΔV
– w + PΔV
– w – PΔV


19. The percentage efficiency of a heat engine that operates between 127°C and 27°C is
20%
50%
100%
25%


20. Thermodynamic condition for irreversible spontaneous process at constant T and P is
ΔG < 0 
ΔS < 0 
ΔG > 0 
ΔH > 0


21. When a liquid boils, there is
an increase in entropy
a decrease in entropy
an increase in heat of vaporization
an increase to free energy


22. Which of the following does not result in an increase in the entropy?
Rusting of iron
Crystallisation of sucrose from solution
Sublimation of camphor
Conversion of ice to water


23. Which one of the following is a state function?
q
Δq
w
ΔS


24. The entropy change for the following process possessing ΔH(transition) as 2090 J .mol–1 1mole Sn (α, 13°C) ⇌ 1mole Sn (β, 13°C) is
22.007 J. mol –1 K–1
7.307 J. mol–1 K–1
0.314 J. mol–1 K–1
109.52 J.mol–1 K–1


25. For an isothermal process, the entropy change of the universe during a reversible process is:
Zero
More
Less
None of the above


26. The SI unit of entropy is :
Cal K–1 mol –1 
erg K–1 mol –1 
J deg–1 mol –2 
J K–1 mol –1


27. Which is the correct statement of IInd law of thermodynamics?
A process accompanied by decrease in entropy tends to be spontaneous
Efficiency of a machine can be cent percent
It is impossible to transfer heat from a cold body to a hot body by a machine without doing any work
It is possible to convert the input energy completely to work by a machine


28. The percentage efficiency of a heat engine working between the temperature T1 K and T2 K (T1 > T2) is given by
(T2 – T1 / T2) x 100 
(T1 – T2 / T1) x 100 
(T1 / T2) x 100 
(T2 / T1) x 100


29. The change in entropy for a system and surrounding are – 0.2287 JK–1  and + 0.260 JK–1respectively. Then entropy change of the universe is
– 0.0313 JK–1
+ 0.0313 JK–1
+ 0.877 JK–1
– 0.877 JK–1


30. The expression G = H – TS is valid for
constant pressure processes
constant temperature and pressure processes
constant temperature processes
constant volume processes


31. In a chemical reaction, when number of molecules of products are more than the number of molecules of reactants
entropy increases
entropy decreases
heat of vapourisation increases
free energy increases


32. A process accompanied by increase in entropy tends to be
isothermal
adiabatic
spontaneous
non-spontaneous


33. The liquid that deviates from Trouton’s rule is
Hydrochloric acid
Sulphuric acid
Phosphoric acid
Acetic acid

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Nuclear Chemistry ONLINE MCQ TEST

Tag:  ONLINE MCQ TEST > Nuclear Chemistry ONLINE MCQ TEST
This Quiz is a Simple test for +2 Science group students which contain Questions asked from  Nuclear Chemistry. Just participate in it and test your skill. 💗💗💗💗💗💗💗

Set- 1       Set -2      Set- 3       Set -4        Set- 5       Set -6         Set-7       Set -8       Set- 9       Set -10

Set -1

1. ₉₂U²³⁵ Nucleus absorbs a neutron and disintegrates into ₅₄Xe¹³⁹, ₃₈Sr⁹⁴ and X. What is X?
3 neutrons
2 neutrons
α – particle
β – particle


2. After 24 hours 0.125 g of the initial quantity of 1 g of a radioactive isotope is left out. The half-life period is
24 hours
12 hours
8 hours
16 hours


3. Find out the missing: In a reaction ₅B⁸ → ₄Be⁸ + ?
α - particle
β - particle
electron capture
positron


4. Half life period of a radioactive element is 1500 years. Find the value of disintegration const
0.1465 x 10–10 sec–1
0.2465 x 10–10 sec–1
0.1465 x 10–8 sec–1
0.3645 x 10–10 sec–1


5. Half-life period of a radioactive element is 100 seconds. Its average life period is
100 seconds
50 seconds
200 seconds
144 seconds


6. In nuclear reaction____is / are balanced on both sides
mass
number of atoms
mass number
atomic number and mass number


7. Loss of β – particle is equivalent to
increase of one proton only
decrease of one neutron
none of these
both (a) and (b)


8. Radioactivity is due to
Stable electronic configuration
Stable nucleus
Unstable nucleus
Unstable electronic configuration


9. The isotope of which element is used in nuclear fusion reaction?
Barium
Lead
Uranium
Caesium


10. The most penetrating radiations are
α rays
β rays
γ rays
all are equally penetrating


11. The reaction ₅B⁸ → ₄Be⁸ takes place due to
α - decay
β - decay
electron capture
positron decay


12. When ₇N¹⁵ is bombarded with a proton it gives ₆C¹² and
α - particle
β - particle
neutron
proton


13. Which of the following is used as neutron absorber in nuclear reactors?
Water
Deuterium
Uranium
Cadmium


14. Which one of the following particles is used to bombard ₁₃Al²⁷ to give ₁₅P³⁰ and a neutron?
α - particle
Deuteron
Proton
Neutron


15. β - particle is represented as :
+1e0
– 1e0
1H1
2He4


16. The phenomenon of radioactivity was discovered by
Madam Curie
Pierre Curie
Henry Becquerel
Rutherford


17. Half-life period of ₇₉Au¹⁹⁸ nucleus is 150 days. The average life is
216 days
21.6 days
261 days
26.1 days


18. In the following radioactive decay, 92x232 → 89y220, how many α and β particles are ejected.
3 α and 3 β
5 α and 3 β
3 α and 5 β
5 α and 5 β


19. In the nuclear reaction, 92U238  → 82Pb206  the number of α and β particles emitted are,
7 α, 5 β
6 α, 4 β
4 α, 3 β
8 α, 6 β


20. In the nuclear reaction 90Th232 → 82Pb208 the number of α and β particles emitted are,
1α, 4β
2α, 2β
6α, 4β
8α, 4β


21. High speed projectiles may chip a heavy nucleus into several fragments in
Nuclear Fission reaction
Nuclear Fusion reaction
Spallation reaction
All of these


22. The average life τ of a radioactive element is
1/λ2
0.693/t1/2
1.44 t1/2
14.4 t1/2

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Coordination Compound ONLINE MCQ TEST

Tag:  ONLINE MCQ TEST > Coordination Compound ONLINE MCQ TEST
This Quiz is a Simple test for +2 Science group students which contain Questions asked from  Coordination Compound . Just participate in it and test your skill. 💗💗💗💗💗💗💗

Set- 1       Set -2      Set- 3       Set -4        Set- 5       Set -6         Set-7       Set -8       Set- 9       Set -10

Set -1

1. [FeF6]^{4 –} is paramagnetic because, F ^– is a ________
weaker ligand
stronger ligand
flexidentate ligand
chelating ligand


2. An example of a bidentate ligand is
NO2–
NO3–
en
SO4–2


3. An example of a chelating ligand is
Chloro
Bromo
en
NO2– / nitro


4. An example of ambidentate ligand is
Cl–
NO2–
H2O
NH3


5. In [Fe(CN)6]^{4 –} the central metal ion is
Fe
Fe2+
Fe3+
(CN) –


6. The co-ordination number of Cr(III) in [Cr(H2O)4Cl2]Cl . 2H2O is
3
4
6
2


7. The coordination number of Ni (II) in [Ni(CN)4]^{2 –} is
2
4
5
6


8. The oxidation number of Nickel in the complex ion, [NiCl4]^2– is
+ 1
– 1
+ 2
– 2


9. The coordination number of Nickel in the complex ion [NiCl4]^2– is
+ 1
+ 4
+ 2
+ 6


10. The geometry of [Fe(CN)6]^{4 –} is
Tetrahedral
Square Planar
Octahedral
Triangular


11. The geometry of [Ni(CN)4]^{2 –} is
Tetrahedral
Square Planar
Triangular
Octahedral


12. The type of isomerism found in the complexes [Pt(NH₃)₄][CuCl₄] and [PtCl₄][Cu(NH₃)₄] is
ionization isomerism
co-ordination isomerism
linkage isomerism
ligand isomerism


13. Which of the following is cationic complex?
K4[Fe(CN)6]
[Cu(NH3)4]2+
K3[Cr(C2O4)3]
K3[Fe(CN)6]


14. Which is not an anionic complex?
[Cu(NH3)4]Cl2
K4[Fe(CN)6]
K3[Fe(CN)6]
[NiCl4]2–


15. The unit of paramagnetic moment is
debye
k joules
BM
ergs


16. The type of isomerism found in the complexes [Co(NO2)(NH3)5]SO4 and [Co(SO4)(NH3)5]NO2  is
Hydrate isomerism
Coordination isomerism
Linkage isomerism
Ionisation isomerism


17. The name of [Pt^IV(NH3)2Cl2]²⁺ is
Diamminedichloroplatinum(IV) ion
Diamminedichloroplanitate(IV)
Diamminedichloroplatinum
Dichlorodiammineplatinum(IV) ion


18. For a compound K4[Fe(CN)6] → 4K⁺ + [Fe(CN)6]^4–, the complex ion is
K+
CN–
FeII
[Fe(CN)6]4–


19. The geometry of [Cu(NH3)4]²⁺ complex ion
Linear
Tetrahedral
Square planar
Angular


20. Valence bond theory does not explain the property of complex compound
geometry
magnetic
nature of ligand
colour


21. Which a double salt
K2SO4.Al2(SO4)3.24H2O
NaCl
K4[Fe(CN)6]
KCl


22. Chlorophyll is a__________complex
Magnesium-Porphyrin
Iron-Porphyrin
Copper-Porphyrin
Nickel-Porphyrin


23. A metal ion from the first transition series forms an octahedral complex with magnetic moment of 4.9 BM and another octahedral complex which is diamagnetic. The metal ion is
Fe2+
Co2+
Mn2+
Ni2+


24. The function of Ferredoxin is
photosynthesis
storage and transport of oxygen
electron transfer
sensitiser


25. Cis-[Pt(NH3)2Cl2] is used as
Antidote for heavy metal poisoning
synthetic detergent
Anti tumour drug
Masking agent


26. An example of a complex compound having coordination number 4
K4[Fe(CN)6]
[Co(en)3]Cl3
[Fe(H2O)6]Cl3
[Cu(NH3)4]Cl2

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