3.00 mol of PCl5 kept in 1L closed reaction vessel was allowed to attain equilibrium at 380K. The
composition of the mixture at equilibrium is-

(Given: Kc= 1.80)

1. [PCl
5] = 1.41 M; [PCl3] = [Cl2] = 1.59 M
2. [PCl
5] = 1.61 M; [PCl3] = [Cl2] = 1.59 M
3. [PCl
5] = 1.91 M; [PCl3] = [Cl2] = 1.71 M
4. [PCl
5] = 2.41 M; [PCl3] = [Cl2] = 1.19 M

Subtopic:  Introduction To Equilibrium |
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The value of G for the phosphorylation of glucose in glycolysis is 13.8 kJ/mol.
The value of 
Kc at 298 K is-

1. 5.21 × 103
2. 3.56 × 103
3. 2.81 × 103
4. 3.81 × 103

Subtopic:  Kp, Kc & Factors Affecting them |
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Hydrolysis of sucrose gives,

Sucrose + H2O  Glucose + Fructose

The equilibrium constant Kc for the reaction is 2 ×1013 at 300K. The value of G at 300K is-

1. – 5.64 ×10
4 J mol–1
2. – 7.64 ×104 J mol–1
3. – 6.64 ×104 J mol–1
4. – 8.64 ×104 J mol–1

Subtopic:  Kp, Kc & Factors Affecting them |
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The correct match among the following is/are-

Acid Conjugate Base
a. HF H2F-
b. H2SO4 HSO4-
c. \(HCO_{3}^{-}\) \(CO_{3}^{2-}\)


1. a, c
2. a, b
3. b, c
4. Only c is correct

Subtopic:  Acids & Bases - Definitions & Classification |
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The correct match among the following is/are-

Bronsted bases Conjugate Acid
a. \(NH_{2}^{-}\) NH3
b. NH3 \(NH_{4}^{+}\)
c. \(HCOO^{-}\) \(CO_{2}^{2-}\)


1. a, c
2. a, b
3. b, c
4. Only c is correct

Subtopic:  Acids & Bases - Definitions & Classification |
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The incorrect match among the following  is-
a. HO = Lewis base
b.
F = Lewis base
c.
H+ = Lewis acid
d.
BCl3 = Lewis base

1. Both a, and b
2. Only b
3. Only d
4. Both a and d

Subtopic:  Acids & Bases - Definitions & Classification |
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The concentration of hydrogen ions in a sample of soft drink is 3.8 × 10–3M. The pH of soft drink is-

1. 1.45
2. 2.42
3. 3.76
4. 2.79

Subtopic:  pH calculation |
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The ionization constant of HF is 3.2 × 10–4 and its solution concentration is 0.02 M. The  pH of the solution is-

1. 3.45
2. 2.62
3. 4.21
4.  1.89

 

Subtopic:  pH calculation |
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The pH of 0.1M monobasic acid is 4.50. The value of pKa of the monobasic acid is-

1. 6. 3
2. 7.4
3. 8.0
4. 9.0

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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The ionization constant of the hypochlorous acid is 2.5 × 10–5. The concentration of hypochlorous acid 0.08 M. The percent dissociation of HOCl is-

1. 2.56 %
2. 1.21 %
3. 1. 76 %
4. 2.21 %

Subtopic:  Ionisation Constant of Acid, Base & Salt |
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