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Equilibrium Tes...

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  • Question 1
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    A hydrogen electrode placed in a buffer solution of NaCl and HCN in the ratio of X:Y and Y:X has an oxidation electrode potential values E1  and  E2{E_1}\,\,and\,\,{E_2} volts respectively at 250C{25^0}C. The pKa value of HCN is

  • Question 2
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    In a buffer solution the ratio of concentration of NH4Cl  andNH4OH  is  1:1{\text{N}}{{\text{H}}_{\text{4}}}{\text{Cl}}\,\,{\text{and}}\,{\text{N}}{{\text{H}}_{\text{4}}}{\text{OH}}\,\,{\text{is}}\,\,{\text{1:1}} when it changes in 2:1 what will be the value of pH of buffer:-

  • Question 3
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    For the Chemical reaction A2(g) + B2(g)2AB(g){{\text{A}}_{{\text{2}}\left( {\text{g}} \right)}}{\text{ + }}{{\text{B}}_{{\text{2}}\left( {\text{g}} \right)}} \rightleftharpoons {\text{2A}}{{\text{B}}_{\left( {\text{g}} \right)}} the amount of AB at equilibrium is affected by

  • Question 4
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    Which of the following may be regarded as buffer solution? 

  • Question 5
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    If the degree of ionization of water is 1.8 x 10910^{-9} at a given temperature. Its ionic product will be 

  • Question 6
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    2H2OH3O++OH,Kw=1×10142{H_2}O\leftrightharpoons {H_3}{O^ + } + O{H^ - },{K_w} = 1\times {10^{ - 14}} at 25C{25^ \circ }C hence KaK_a is :

  • Question 7
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    The dissociation constant of a weak acid is 1.0×1051.0 \times { 10 }^{ -5 }, the equilibrium constant for its reaction with strong base is 

  • Question 8
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    At 90 C90^{ \circ  }C, pure water has [H3O+]=106.7 mol/lit[{ H }_{ 3 }O^{ + }]={ 10 }^{ -6.7 }\ mol/lit. What is the value of KW{ K }_{ W } at 90 C:{ 90 }^{ \circ  }C :-

  • Question 9
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    If 1M1M CH3COONaC{H_3}COONa is added to 1M1M CH3COOHC{H_3}COOH, then:

  • Question 10
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    One litre of water contains 10710 ^ { - 7 } mole of H+H ^ { + } ions. Degree of ionisation of water is:

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