Which of the following is a characteristic of a reversible reacti

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 Multiple Choice QuestionsMultiple Choice Questions

661.

Which of the following is strongest Bronsted base?

  • ClO-

  • ClO2-

  • ClO3-

  • ClO4-


662.

When the temperature of reactions will increase then the effect on pH value will

  • increase

  • decrease

  • first increases then decreases

  • remains same.


663.

Consider the following salts : NaCl, HgCl2, Hg2Cl2, CuCl2, CuCl and AgCl. Identify the correct set of insoluble salts in water.

  • Hg2Cl2, CuCl, AgCl

  • Hg2Cl, CuCl, AgCl

  • Hg2Cl2, CuCl2, AgCl

  • Hg2Cl2, CuCl, NaCl


664.

The pH of aqueous solution ofammonium formate is (pKa of HCOOH = 3.8 and pKb of NH3= 4.8)

  • 7

  • 6.0

  • 6.5

  • 8.9


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665.

The pH value of decinormal solution of NH4OH which is 20% ionised is

  • 12.95

  • 12.30

  • 14.70

  • 13.30


666.

For the reaction,
2SO2 (g) + O2 (g) 2SO3 (g) at 300 K, the value of G° is -690.9 R. The equilibrium constant value for the reaction at that temperature is (R is gas constant)

  • 10 atm-1

  • 10 atm

  • 10

  • 1


667.

In which of the following reaction Kp> Kc ?

  • PCl3 + Cl3 PCl5

  • H2+I2 2HI

  • 2SO3  O2 + 2SO2

  • N2+ 3H2  2NH3


668.

The ratio of volumes of CH3COOH 0.1 (N) to CH3COONa 0.1 (N) required to prepare a buffer solution of pH 5.74 is (Given pKa of CH3COOH is 4.74)

  • 10 : 1

  • 5 : 1

  • 1 : 5

  • 1 : 10


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669.

Which of the following is a characteristic of a reversible reaction?

  • It never proceeds to completion

  • It can be influenced by a catalyst

  • It proceeds only in forward direction

  • Number of moles of reactants and products are equal.


B.

It can be influenced by a catalyst

Reversible reactions are those reaction in which there is equilibrium established at every infinitesimal step. But the rate of forward and rate of backward reaction can be influenced (or speed up) by the use of catalyst.


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670.

The equilibrium constant of a reaction is 300. If the volume of a reaction flask is trippled, the equilibrium constant will be

  • 300

  • 100

  • 600

  • 150


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