Equilibrium constant for the reaction,H2O (g) + CO (g) ͡

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 Multiple Choice QuestionsMultiple Choice Questions

181.

Conjugate base of HSO4- is

  • SO42-

  • H2SO4

  • H3SO4+

  • None of these


182.

The pKa of a weak acid is 4.8. What should be the ratio of acidsalt, if a buffer of pH = 5.8 is required?

  • 0.1

  • 10

  • 1

  • 2


183.

Which of the following would produce a buffer solution when mixed in equal volumes?

  • 1 M CH3COOH and 0.5 M NaOH

  • 1 M CH3COOH and 0.5 M HCl

  • 1 M NH4OH and 0.5 M NaOH

  • 1 M NH4Cl and 0.5 M HCl


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184.

Equilibrium constant for the reaction,

H2O (g) + CO (g) H2 (g) + CO2 (g) is 81.

If velocity constant of the forward reaction is 162 L mol-1s-1. What is the velocity constant (in L mol-1s-1) for the backward reaction?

  • 13122

  • 2

  • 261

  • 243


B.

2

Velocity constant =

Kckfkb = 16281 = 2


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185.

Which one of the following statements is correct with respect to basic character ?

  • PH3 > P(CH3)3

  • PH3 = NH3

  • PH3 > NH3

  • P(CH3)3 > PH3


186.

75 mL of 0.2 M HCl is mixed with 25 mL of 1M HCl. To this solution, 300 mL of distilled water is added. What is the pH of the resultant solution?

  • 1

  • 2

  • 4

  • 0.2


187.

If the ionic product of water (Kw) is 1.96 x 10-14 at 35°C, what is its value at 10°C?

  • 1.96 × 10-14

  • 3.92 × 10-14

  • 2.95  × 10-14

  • 1.96 × 10-13


188.

Which one of the following statements is correct?

  • Bronsted-Lowery theory could not explain the acidic nature of BCl3

  • The pH of 0.01 M NaOH solution is 2.

  • The ionic product of water at 25°C is 10-10 mol2L-2

  • The pH of a solution can be calculated using the equation pH = log[H+].


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189.

One mole of A(g) is heated to 200°C in a one litre closed flask, till the following equilibrium is reached.

A(g) B(g)

The rate of forward reaction at equilibrium is 0.02 mol L-1min-1. What is the rate (in mol L-1min-1) of the backward reaction at equilibrium?

  • 0.04

  • 0.01

  • 0.02

  • 1


190.

Iron sulphide is heated in air to form A an oxide of sulphur. A is dissolved in water to give an acid. The basicity of this acid is

  • 2

  • 3

  • 1

  • zero


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