According to Le-Chatelier principle, adding heat a solid and liqu

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 Multiple Choice QuestionsMultiple Choice Questions

701.

Which one of the following pair shows Buffer's solution?

  • NaCl + NaOH

  • CH3COONa + CH3COOH

  • CH3COOH + CH3COONH4

  • H2SO4 + CuSO4


702.

Which of the following chloride is water insoluble?

  • HCl

  • AgCl

  • Both 'a' and 'b'

  • None of these


703.

0.005 M acid solution has 5 pH. The percentage ionisation of acid is :

  • 0.8%

  • 0.6%

  • 0.4%

  • 0.2%


704.

CH3COOH is weaker acid than H2SO4.It is due to:

  • more ionization

  • less ionization

  • covalent bond

  • electrovalent bond


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705.

In the reaction 3A + 2B 2C, the equilibrium constant Kc is given by

  • [3A] x[2B][C]

  • [A]3×[B][C]

  • [C]2[A]3×[B]2

  • [C][3A][2B]


706.

The solubility of Sb2S3 in water is 1.0 × 10-5 mol/L at 298K. What will be its solubility product?

  • 108 × 10-25

  • 1.0 × 10-25

  • 144 × 10-25

  • 126 × 10-24


707.

What will be the pH value of 0.05 M Ba(OH)2 solution?

  • 12

  • 13

  • 1

  • 12.96


708.

N2 and H2 in 1 : 3 molar ratio are heated in a closed container having a catalyst. When the following equilibrium N2(g)+3H2(g)  2NH3(g)  is attained, the total pressure is 10 atm and mole fraction of NH3 is 0.60. The equilibrium constant KP for dissociation of NH3 is

  • 1.333 atm-2

  • 0.75 atm-2

  • 0.75 atm2

  • 1.333 atm2


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709.

According to Le-Chatelier principle, adding heat a solid and liquid in equilibrium will cause the

  • amount of solid to decrease

  • amount of liquid to decrease

  • temperature to rise

  • temperature to fall


A.

amount of solid to decrease

Fusion of solid is an endothermic process, so addition of heat is favoured for the forward reaction (solid to melt), the amount of solid become decrease.


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710.

Solubility of AgCl at 20°C is 1.435 x 10-3 g/L. The solubility product of AgCl is

  • 1 x 10-5

  • 1 x 10-10

  • 1.435 x 10-5

  • 108 x10-3


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