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At t^oC , Kw for water is 6.4xx10^-13. T...

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

A

6.91

B

`5.90`

C

6.09

D

5.15

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AAKASH INSTITUTE ENGLISH-TEST 4-EXAMPLE
  1. Which of the following bonds has the highest bond energy?

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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  20. 75 calories of heat is required to raise the temperature of 3 moles of...

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