# 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. [PCl5] = 1.41 M; [PCl3] = [Cl2] = 1.59 M 2. [PCl5] = 1.61 M; [PCl3] = [Cl2] = 1.59 M 3. [PCl5] = 1.91 M; [PCl3] = [Cl2] = 1.71 M 4. [PCl5] = 2.41 M; [PCl3] = [Cl2] = 1.19 M

Subtopic:  Introduction To Equilibrium |
64%
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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 |
66%
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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 |
88%
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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 |
86%
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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 |
76%
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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:
(Given: log 3.8 = 0.58)

 1 1.45 2 2.42 3 3.76 4 2.79
Subtopic:  pH calculation |
80%
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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 |
62%
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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 |
56%
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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 |
70%
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