Home
Class 12
CHEMISTRY
A 0.1 M solution of a weak acid HA is 1%...

A 0.1 M solution of a weak acid HA is 1% dissociated. The approximate value of dissociation constant is :

A

`1.0xx10^(-4)mol L^(-1)`

B

`0.1xx10^(-2)mol L^(-1)`

C

`1xx10^(-3)mol L^(-1)`

D

`0.1xx10^(-4)mol L^(-1)`

Text Solution

Verified by Experts

The correct Answer is:
D
`K_(a)=c alpha^(2)=0.1xx(0.01)^(2)`
`=0.1xx10^(-4)`
Promotional Banner

Topper's Solved these Questions

  • EQUILIBRIUM

    MODERN PUBLICATION|Exercise Multiple Choice Questions (Level - III)|13 Videos

  • EQUILIBRIUM

    MODERN PUBLICATION|Exercise Recent Examination Questions|17 Videos

  • EQUILIBRIUM

    MODERN PUBLICATION|Exercise Recent Examination Questions|17 Videos

  • ENVIROMENTAL POLLUTION

    MODERN PUBLICATION|Exercise RECENT EXAMINATION QUESTIOS|2 Videos

  • GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

    MODERN PUBLICATION|Exercise Recent Examination Questions|13 Videos

Similar Questions

Explore conceptually related problems

0.2 m aqueous solution of a weak acid (HX) is 20% dissociated. The boiling point of this solution is ( K_(b) for water = 0.52 Km^(-1) )

A 1% solution of phenol is a

The pH of a 0.1 molar solution of the acid HQ is 3. The value of the ionization constant, K_(a) of this acid is :

0.85% aqueous solution of NaNO_(3) is apparently 90% dissociated . The osmotic pressure of solution at 300 K is

Which of the following acids has the smallest dissociation constant ?

In a 0.2 molal aqueous solution of a weal acid, HX, the degree of dissociation is 0.3 . Taking K_(f) for water as 1.85, the freezing point of the solution will be nearest to

When a 0.1 M solution of an acid at room temperature has degree of ionisation of 10%, the concentration of hydroxyl ions is :

MODERN PUBLICATION-EQUILIBRIUM-Multiple Choice Questions (Level - II)
  1. The solubility product of a compound MX is 2.5xx10^(-9) at 25^(@)C. It...

    Text Solution

    |

  2. What would be the solubility of AgCl in 0.1 M NaCl solution ? (K(sp)" ...

    Text Solution

    |

  3. A 0.1 M solution of a weak acid HA is 1% dissociated. The approximate ...

    Text Solution

    |

  4. The solubility of a compound MX(2) at 25^(@)C is 5.0xx10^(-3) mol/L. I...

    Text Solution

    |

  5. When a 0.1 M solution of an acid at room temperature has degree of ion...

    Text Solution

    |

  6. Which of the following mixture solution has pH ~~ 1.0 ?

    Text Solution

    |

  7. A buffer solution contains 0.1 M each of acetic acid and sodium acetat...

    Text Solution

    |

  8. Ammonium cyanide is a salt of NH(4)OH(K(b)=1.8xx10^(-5)) and HCN (K(a)...

    Text Solution

    |

  9. When 0.01 moles of sodium hydroxide are added to a buffer solution, it...

    Text Solution

    |

  10. Let the solubilities of AgCl in water, in 0.01 M CaCl(2), in 0.01 M Na...

    Text Solution

    |

  11. In which of the following solvents will AgBr has highest solubility ?

    Text Solution

    |

  12. For the equilibrium : HCO(3)^(-)hArr H^(+)+CO(3)^(2-) K=4.8xx10...

    Text Solution

    |

  13. The pH of solution obtained by mixing equal volumes of two aqueous sol...

    Text Solution

    |

  14. The conjugate acid of NH(2)^(-) is :

    Text Solution

    |

  15. 50 ml of 0.1 M HCl and 50 ml of 0.2 M NaOH are mixed. The pH of the re...

    Text Solution

    |

  16. Solubility of AgCl will be minimum in :

    Text Solution

    |

  17. The pH of an aqueous solution of Mg(OH)(2) is 9.0. If the solubility p...

    Text Solution

    |

  18. Equal volumes of two solutions of pH 4 and pH 11 are mixed. The pH of ...

    Text Solution

    |

  19. At 298 K, the solubility product of MI is 10^(-6) (conc. Are expressed...

    Text Solution

    |

  20. The pKa of HCN is 9.30. The pH of a solution prepared by mixing 2.5 m...

    Text Solution

    |