JEE Main & Advanced Chemistry Equilibrium / साम्यावस्था Question Bank

done Equilibrium state Total Questions - 10

• question_answer1)
  In any chemical reaction, equilibrium is supposed to be establish when [CPMT 1974, 80, 89; EAMCET 1975, 77, 79; MP PMT 1990; NCERT 1980; MP PET 1995]
  A)
                  Mutual opposite reactions undergo done clear
  B)
                  Concentration of reactants and resulting products are equal done clear
  C)
                  Velocity of mutual reactions become equal done clear
  D)
                  The temperature of mutual opposite reactions become equal done clear
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• question_answer2)
  Which of the following conditions represents an equilibrium
  A)
                  Freezing of ice in a open vessel, temperature of ice is constant done clear
  B)
                  Few drops of water is present along with air in a balloon, temperature of balloon is constant done clear
  C)
                  Water is boiling in an open vessel over stove, temperature of water is constant done clear
  D)
                  All the statements A, B and C are correct for the equilibrium done clear
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• question_answer3)
  When rate of forward reaction becomes equal to backward reaction, this state is termed as [NCERT 1975, 80; CPMT 1973, 74, 77]
  A)
                  Chemical equilibrium      done clear
  B)
                  Reversible state done clear
  C)
                  Equilibrium         done clear
  D)
                  All of these done clear
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• question_answer4)
  In chemical reaction \[A\]⇌\[B\], the system will be known in equilibrium when             [MP PMT 1990; NCERT 1977]
  A)
                  A completely changes to B done clear
  B)
                  50% of A changes to B done clear
  C)
                  The rate of change of A to B and B to A on both the sides are same done clear
  D)
                  Only 10% of A changes to B done clear
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• question_answer5)
  A chemical reaction is at equilibrium when [NCERT 1975; CPMT 1974; MP PMT 1996; KCET 1993; IIT 1978; Manipal MEE 1995; Pb. PMT 2002]
  A)
                  Reactants are completely transformed into products done clear
  B)
                  The rates of forward and backward reactions are equal done clear
  C)
                  Formation of products is minimised done clear
  D)
                  Equal amounts of reactants and products are present done clear
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• question_answer6)
  In the chemical reaction \[{{N}_{2}}+3{{H}_{2}}\]⇌\[2N{{H}_{3}}\] at equilibrium point, state whether              [NCERT  1977]
  A)
                  Equal volumes of \[{{N}_{2}}\] and \[{{H}_{2}}\]  are reacting done clear
  B)
                  Equal masses of \[{{N}_{2}}\] and \[{{H}_{2}}\] are reacting done clear
  C)
                  The reaction has stopped done clear
  D)
                  The same amount of ammonia is formed as is decomposed into \[{{N}_{2}}\] and \[{{H}_{2}}\] done clear
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• question_answer7)
  For the reaction \[PC{{l}_{3}}(g)+C{{l}_{2}}(g)\] ⇌ \[PC{{l}_{5}}(g)\] the position of equilibrium can be shifted to the right by           [MP PMT 2004]
  A)
                  Increasing the temperature done clear
  B)
                  Doubling the volume done clear
  C)
                  Addition of \[C{{l}_{2}}\] at constant volume done clear
  D)
                  Addition of equimolar quantities of \[PC{{l}_{3}}\]and \[PC{{l}_{5}}\] done clear
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• question_answer8)
  If a system is at equilibrium  the rate of forward to the reverse reaction is                                            [UPSEAT  2004]
  A)
                  Less       done clear
  B)
                  Equal done clear
  C)
                  High       done clear
  D)
                  At equilibrium done clear
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• question_answer9)
  Chemical equilibrium is dynamic in nature because [IIT 1977]
  A)
                  Equilibrium is maintained rapidly done clear
  B)
                  The concentration of reactants and products become same at equilibrium done clear
  C)
                  The concentration of reactants and products are constant but different done clear
  D)
                  Both forward and backward reactions occur at all times with same speed done clear
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• question_answer10)
  The number of gram molecules of a substance present in unit volume is termed as          [MP PMT 1993]
  A)
                  Activity done clear
  B)
                  Normal solution done clear
  C)
                  Molar concentration       done clear
  D)
                  Active mass done clear
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