11th Standard Syllabus & Materials
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Published on: 10/11/2020
11th Standard Chemistry Physical and Chemical Equilibrium English Medium Free Online Test One Mark Questions 2020 - 2021
Download Tamil Nadu 11th Standard Chemistry question papers, model tests, one-mark questions, important questions, and public exam papers in PDF format. Free study materials and answer keys for TN State Board students.
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1.
Which one of the following equation is not correct?
∆Go = - RTlnK
∆Go = ∆Ho -T∆So
-RTlnK = ∆Ho -T∆So
ln k = \(\frac { \Delta { H }^{ o } }{ T } -\frac { \Delta { S }^{ o } }{ R } \)
2.
For the homogeneous gas reaction at 600K \(4NH_{ 3\left( g \right) }+5{ O }_{ 2\left( g \right) }\rightleftharpoons 4NO_{ \left( g \right) }+6{ H }_{ 2 }{ O }_{ \left( g \right) }\) The unit of equilibrium constant K" is
(mol dm-3)-1
(mol dm-3)
(mol dm-3)10
(mol dm-3)9
3.
In the system; \(Fe\left( OH \right) _{ 3\left( s \right) }\rightleftharpoons { Fe }_{ \left( aq \right) }^{ 3+ }+{ 3OH }_{ \left( aq \right) }\) decreasing the conc. of OH-ions \(\cfrac { 1 }{ 3 } ^{ - }\)times will cause the equilibrium cone, of Fe3+ to increase_____________ times
27
9
18
3
4.
Equilibrium constant Kp for following reaction
\(MgCO_{ 3\left( s \right) }\rightleftharpoons Mg{ O }_{ \left( s \right) }+{ CO }_{ 2\left( g \right) }\)
Kp = Pco2
\({ K }_{ p }=\cfrac { { p }_{ { CO }_{ 2 } }\times { p }_{ CO_{ 2 } }\times { p }_{ Mgo } }{ { P }_{ MrCO } } \)
\({ K }_{ p }=\cfrac { { P }_{ MG }{ CO }_{ 3 } }{ { P }_{ CO\bullet }p_{ mgO } } \)
\({ K }_{ p }=\cfrac { { P }_{ MG }{ CO }_{ 3 } }{ { P }_{ CO\bullet }p_{ mgO } } \)
5.
The active mass of 7.0 g of nitrogen in a 2.0 L container would be ____________
0.25
0.125
0.5
14.0
6.
Sulphide ion reacts with solid sulphur
\({ S }_{ \left( aq \right) }^{ 2- }+{ S }_{ \left( s \right) }\rightleftharpoons { S }_{ 2\left( aq \right) }\) K1 = 10
\({ S }_{ \left( aq \right) }^{ 2- }+{ 2S }_{ \left( s \right) }\rightleftharpoons { S }_{ 3\left( aq \right) }\) K2 = 130
The equilibrium constant for the formation of \({ S }_{ 3 }^{ 2- }\left( aq \right) \) and \({ S }_{ 2 }^{ 2- }\left( aq \right) \)
10
13
130
1300
7.
In the manufacture of NH3 by Haber's process involving the reaction.\({ N }_{ 2\left( g \right) }+{ 3H }_{ 2\left( g \right) }\overset { \left[ { Fe }_{ 2 }{ O }_{ 2 } \right] }{ \rightleftharpoons } 2{ NH }_{ 3\left( g \right) }\) \(\Delta H\)=-22.08 kcal. The favourable conditions are ___________
High pressure and low temperature
High pressure and high temperature
Low pressure and high temperature
Low pressure and low temperature
8.
The value of equilibrium constant of the reaction,
\({ HI }_{ \left( g \right) }\rightleftharpoons \cfrac { 1 }{ 2 } { H }_{ 2\left( g \right) }+\cfrac { 1 }{ 2 } { I }_{ 2\left( g \right) }\) is 8.0. The equilibrium constant of the reaction; \({ H }_{ 2\left( g \right) }+I_{ 2\left( g \right) }\rightleftharpoons { 2HI }_{ \left( g \right) }\)
\(\cfrac { 1 }{ 8 } \)
\(\cfrac { 1 }{ 16 } \)
16
\(\cfrac { 1 }{ 64 } \)
9.
The value of AH for the reaction
\({ X }_{ 2\left( g \right) }+4Y_{ 2\left( g \right) }\rightleftharpoons 2XY_{ 4\left( g \right) }\) is less than zero. Formation of XY4(g) will be favoured at :
High pressure and low temperature
Low pressure and low temperature
High temperature and high pressure
High temperature and low pressure.
10.
The favourable conditions for melting of ice is ________
Low pressure
High pressure
Low temperature
Absence of catalyst
11.
The numerical, value of equilibrium constant depends on _____________
temperature
pressure
concentration of reactants
all of these
12.
A state of equilibrium is reached when _____________
The rate of forward reaction is greater than the rate of the reverse reaction
The concentration of the products and reactants are equal
More product is present than rea
The concentration of the products and reactants have reached constant value
13.
In melting of ice, which one of the conditions will be more favorable?
high temperature and high pressure
low temperature and low pressure
low temperature and high pressure
high temperature and low pressure
14.
XY2 dissociates as,\(XY_{ 2\left( g \right) }\rightleftharpoons { XY }_{ \left( g \right) }+Y_{ \left( g \right) }\) Initial pressure of XY2 is 600mm Hg. The total pressure at equilibrium is 800mm Hg. Assuming volume of system to remain constant, the value of Kp is ______________
50
100
400
20
15.
In which of the following does the reaction go almost to completion?
Kc = 103
Kc = 102
Kc = 10-2
Kc= 10-3
16.
A 20 litre container at 400 K contains CO2 (g) at pressure 0.4 atm and an excess of SrO (neglect the volume of solid SrO). The volume of the container is now decreased by moving the movable piston fitted in the container. The maximum volume of the container, when pressure of CO2 attains its maximum value will be: Given that: SrCO3 (S) ⇌ SrO (S) + CO2(g)
KP = 1.6 atm
2 litre
5 litre
10 litre
4 litre
17.
Equimolar concentrations of H2 and I2 are heated to equilibrium in a 1 litre flask. What percentage of initial concentration of H2 has reacted at equilibrium if rate constant for both forward and reverse reactions are equal ____________
33%
66%
(33)2%
16.5%
18.
K1 and K2 are the equilibrium constants for the reactions respectively.
\({ N }_{ 2 }(g)+{ O }_{ 2 }(g)\overset { { K }_{ 1 } }{ \rightleftharpoons } 2NO(g)\)
\(2NO(g)+{ O }_{ 2 }(g)\overset { { K }_{ 2 } }{ \rightleftharpoons } { 2NO }_{ 2 }(g)\)
What is the equilibrium constant for the reaction NO2(g) ⇌ ½N2(g) + O2(g)
\({1\over \sqrt{K_1K_2}}\)
(K1 = K2)1/2
\({1\over 2K_1K_2}\)
\(({1\over K_1K_2})^{3/2}\)
19.
Solubility of carbon dioxide gas in cold water can be increased by ____________
increase in pressure
decrease in pressure
increase in volume
none of these
20.
If Kb and Kf for a reversible reactions are 0.8 x 10–5 and 1.6 x 10–4 respectively, the value of the equilibrium constant is __________
20
0.2 x 10-4
0.05
none of these
1.
(d)
ln k = \(\frac { \Delta { H }^{ o } }{ T } -\frac { \Delta { S }^{ o } }{ R } \)
2.
(b)
(mol dm-3)
3.
(a)
27
4.
(a)
Kp = Pco2
5.
(b)
0.125
6.
(b)
13
7.
(a)
High pressure and low temperature
8.
(d)
\(\cfrac { 1 }{ 64 } \)
9.
(a)
High pressure and low temperature
10.
(b)
High pressure
11.
(a)
temperature
12.
(d)
The concentration of the products and reactants have reached constant value
13.
(a)
high temperature and high pressure
14.
(b)
100
15.
(a)
Kc = 103
16.
(b)
5 litre
17.
(a)
33%
18.
(a)
\({1\over \sqrt{K_1K_2}}\)
19.
(a)
increase in pressure
20.
(a)
20
11th Standard Syllabus & Materials
11th Standard
TN 11th Tamil பீடு பெற நில் - செய்யுள் - காவடிச்சிந்து Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil பீடு பெற நில் - உரைநடை - மலை இடப்பெயர்கள் : ஓர் ஆய்வு Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - துணைப்பாடம் - யானை டாக்டர் Important Questions And Answers Study Material - QB365 Set A
NEW11th Standard
TN 11th Tamil மாமழை போற்றுதும் - செய்யுள் - ஐங்குறுநூறு Important Questions And Answers Study Material - QB365 Set A
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