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Dissociation constant (Ka) of formic aci...

Dissociation constant `(K_a)` of formic acid and acetic acid are `2.5xx10^-4` and `0.5xx10^-5` respectively. The ratio of their relative strengths at the same concentration is

A

2.09

B

7.07

C

4.26

D

6.03

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AAKASH INSTITUTE ENGLISH-TEST 4-EXAMPLE
  1. If the volume of a given mass of a gas at constant temperature becomes...

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  2. Which of the following bonds has the highest bond energy?

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  3. Dissociation constant (Ka) of formic acid and acetic acid are 2.5xx10^...

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  4. At t^oC , Kw for water is 6.4xx10^-13. The pH of water at t^oC will be

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  5. An ideal gas has specific heat at constant volume Cv = (3/2)R. The gas...

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  6. Degree of hydrolysis (alpha) for a salt of strong acid and weak base i...

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  7. An ideal gas has specific heat at constant volume Cv = (3/2)R. The gas...

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  8. The favourable conditions for the reaction, 2H(g)hArrH2(g) are

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  9. At 27^(@)C, K(p) value for the reaction CaCO(3)(s) hArr CaO (s) + CO...

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  10. Which of the following is not a conjugate acid-base pair?

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  11. One litre sample of hard water contains 0.006 mole CaCl2. The minimum ...

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  12. In a buffer solution concentration of (NH4)2SO4 and NH4OH are 0.4 M an...

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  13. At 25^oC, K(sp) for AB2 salt is equal to 8xx10^-6. If the salt is 70% ...

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  14. At constant temperature, vapour density of N2O4 is found to be 40. Per...

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  15. Which one of the following has the highest basic character?

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  16. Calculate the change in entropy (DeltarS^o) at 298 K for the reaction ...

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  17. At 25^oC, if the concentration of Ag^+ ion is 1.5xx10^-4 mol/L in the ...

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  18. Among the following which salt do not undergo hydrolysis?

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  19. If 2^oC rise in temperature takes place on the combustion of 1.0 g of ...

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  20. In a system A(s)hArr2B (g)+ 3C (g), if the concentration of C at equil...

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