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For a reversible reaction aA+bBhArrcC+dD...

For a reversible reaction `aA+bBhArrcC+dD`, the variation of `K` with temperature is given by log `(K_(2))/(K_(1))=(-DeltaH^(@))/(2.303R) [(1)/(T_(2))-(1)/(T_(1))]` then,

A

`K_(2)gtK_(1) "if" T_(2)gtT_(1)` for an endothermic change

B

`K_(2)ltK_(1) "if" T_(2)gtT_(1)` for an endothermic change

C

`K_(2)gtK_(1) "if" T_(2)gtT_(1)` for an endothermic change

D

`K_(2)gtK_(1) "if" T_(2)gtT_(1)` for an endothermic change

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The correct Answer is:
A, D
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For a reaction, aA+bBhArrcC+dD , the reaction quotient Q=([C]_(0)^(c)[D]_(0)^(d))/([A]_(0)^(a)[B]_(0)^(b)) , where [A]_(0) , [B]_(0) , [C]_(0) , [D]_(0) are initial concentrations. Also K_(c)=([C]^(c)[D]^(d))/([A]^(a)[B]^(b)) where [A] , [B] , [C] , [D] are equilibrium concentrations. The reaction proceeds in forward direction if Q lt K_(c) and in backward direction if Q gt K_(c) . The variation of K_(c) with temperature is given by: 2303log(K_(C_(2)))/(K_(C_(1)))=(DeltaH)/(R)[(T_(2)-T_(1))/(T_(1)T_(2))] . For gaseous phase reactions K_(p)=K_(c)(RT)^(Deltan) where Deltan= moles of gaseous products - moles of gaseous reactants. Also -DeltaG^(@)=2.303RT log_(10)K_(c) . Which relation is correct?

For a reaction, aA+bBhArrcC+dD , the reaction quotient Q=([C]_(0)^(c)[D]_(0)^(d))/([A]_(0)^(a)[B]_(0)^(b)) , where [A]_(0) , [B]_(0) , [C]_(0) , [D]_(0) are initial concentrations. Also K_(c)=([C]^(c)[D]^(d))/([A]^(a)[B]^(b)) where [A] , [B] , [C] , [D] are equilibrium concentrations. The reaction proceeds in forward direction if Q lt K_(c) and in backward direction if Q gt K_(c) . The variation of K_(c) with temperature is given by: 2303log(K_(C_(2)))/(K_(C_(1)))=(DeltaH)/(R)[(T_(2)-T_(1))/(T_(1)T_(2))] . For gaseous phase reactions K_(p)=K_(c)(RT)^(Deltan) where Deltan= moles of gaseous products - moles of gaseous reactants. Also -DeltaG^(@)=2.303RT log_(10)K_(c) . ( B ) The moisture content of a gas is often expressed as dew point, the temperature at which if gas is cooled becomes saturted with vapour pressure of water at that temperture. Dew point of H_(2)O is 43^(@)C having vapour pressure 0.07 "torr" . CaCl_(2)*2H_(2)O_((s))hArrCaCl_(2(s))+2H_(2)O_((g)) , The equilibrium constant should not be more than..... (atm)^(2) if CaCl_(2) is to be used as desiccant.

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Each question contains STATEMENT-1 (Assertion) and STATEMENT-2( Reason). Examine the statements carefully and mark the correct answer according to the instruction given below: STATEMENT-1: The equilibrium constant of the exothermic reaction at high temperature decreases. STATEMENT-2: Since In (K_(2))/(K_(1))=(DeltaH^(@))/(R)[(1)/(T_(1))-(1)/(T_(2))] and for exothermic reaction , DeltaH^(@)= -ve and thereby, (K_(2))/(K_(1))lt1

RESONANCE-CHEMICAL EQUILIBRIUM-Exercise-2 (Part-3)
  1. The equation alpha=(D-d)/((n-1)d) is correctly matched for: (alpha is ...

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  2. If reaction A+BhArrC+D, taken place in 5 liter close vessel, the rate ...

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  3. Consider equilibrium H(2)O(l)hArrH(2)O(g). Choose the correct directio...

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  4. Consider the following equilibrium 2AB(g)hArrA(2)(g)+B(2)(g) The v...

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  5. Vapour density of equilibrium PCI(5)(g)hArrPCI(3)(g)+CI(2)(g) is decre...

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  6. CuSO(4),5H(2)O(s)hArrCuSO(4)(s)+5H(2)O(g)K(P)=10^(-10) "moles of" CuSO...

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  7. CuSO(4).5H(2)O(s)hArrCuSO(4).3H(2)O(s)+2H(2)O(s) K(P)=0.4xx10^(-3) atm...

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  8. For a reversible reaction aA+bBhArrcC+dD, the variation of K with temp...

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  9. 1 mole each of H(2)(g) "and" I(2)(g) are introduced in a 1L evacuated ...

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  10. For the reaction: PCI(5)(g)hArrPCI(3)(g)+CI(2)(g) The forward reacti...

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  11. Which of the following reaction will shift in forward direction. When ...

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  12. Which of the following will not affect the value of equilibrium consta...

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  13. If the volume of the racion flask is reduced to half of its initial va...

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  14. 2CaSO(4)(s)hArr22CaO(s)+2SO(2)(g)+O(2)(g), DeltaHgt0 Above equilibri...

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  15. An industrial fuel, 'water gas', which consists of a mixture of H(2) "...

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  16. The dissociation of phosgene, which occurs according to the reaction ...

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  17. If two gases AB(2) and B(2)C are mixed, following equilibria are readi...

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  18. Consider the following two equilibria simultaneously established in a ...

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  19. Sufficient amount of a solid X is taken in a rigid vessel at T^(@)C wh...

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  20. CaCO(3)(s)hArrCaO(s)+CO(2)(g) CO(2)(g)hArrCO(g)+(1)/(2)O(2)(g) For...

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