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Chapterwise Q & A
Chemistry : Part I For Class 11
Equilibrium
Q1
What do you mean by Buffer Solution?
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Q2
What is the relation between Kp and Kc ?
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Q3
What is the difference between Ka and Kb ?
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Q 4 What is an Ionic Equilibrium?
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Q5
Why does the pH of blood almost constant inspite the variety of foods and spices we eat?
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Q 6 What is Le Chatelier’s principle?
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Chapterwise Q & A
Q7
What is a chemical equilibrium?
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Q8
Define Lewis Acids and Bases.
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Q9
Write conjugate acid of NH3.
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Q 10
Write conjugate acid of HCOO- .
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Q 11
Write conjugate base of HClO4 .
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Q 12
Chapterwise Q & A
Write conjugate base of H2SO4.
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Q 13
Which of the following is Lewis acid? NH4+ or BF3
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Q 14
Define Arrhenius concept of acids and bases.
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Q 15
The concentration of hydrogen ion in a sample of Hydrochloric acid is 0.0038 M. What is its
pH?
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Q 16
What is meant by Hydrolysis of salts?
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Q 17
What is Solubility Product?
Chapterwise Q & A
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Q 18 What are the effects of catalyst and inert gas addition?
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Q 19
Define Law of chemical equilibrium.
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Q 20
(i)Define the term ‘pH of solution’.
(ii) The hydrogen ion concentration of a solution is 10-4.Calculate the pH of solution.
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Q 21
What is a Common Ion Effect?
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Q 22 At equilibrium, the concentrations of N2 =0.0032 M, O2 = 0.0043 M and NO =0.0026 M
in a sealed vessel at 800K. What will be Kc for the reaction?
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Chapterwise Q & A
Q 23
Hydrolysis of sucrose gives,
Sucrose + water
Glucose + Fructose
Equilibrium constant, Kc for the reaction is 3x1011 at 300 K. Calculate
G at 300 K
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Q 24
State Ostwald’s dilution law.
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Q 25
The pKa of acetic acid and pKb of ammonium hydroxide are 4.82 and 4.72. Calculate the pH
of ammonium acetate solution?
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Q 26 Calculate the solubility of AX in pure water. The solubility product of AX is 2.5 x10-20 .
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Q 27 (a)Define
(i)Hund’s rule (ii) Covalent radius (iii) Metallic radius
(b)What are transition elements? Write their general electronic configuration also.
Chapterwise Q & A
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Q 28
Define bronsted-Lowry theory of acids and bases. Name the bronsted acid and base in the
dissolution of ammonia and water.
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Q 29 What are the applications of Equilibrium constant?
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Q 30 What are the effects of temperature, Pressure and concentration on the equilibrium?
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Q 31 For the equilibrium,
The value of equilibrium constant,Kc is 4.30 x 10-6 at 1069 K. calculate the Kp for the
reaction at this temperature?
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Q 32 The ionization constant of HF is 3.4 x 10-4. Calculate the degree of dissociation of HF in
its 0.02 M solution?
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Chapterwise Q & A
Q 33 (a)
Write expression showing relationship between
and
for following
reaction
(b)Define conjugate acid and base with an example.
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Q 34
12.8 gm of N2O4 was placed in a 1L reaction vessel at 400 K and allowed to attain
equilibrium
The total pressure at equilibrium was found to be 8.29 bar calculate Kp ,Kc and partial
pressure at equilibrium?
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For TYS TEAM