Home
Class 11
CHEMISTRY
Assertion (A): Methy red has K(a) = 10^(...

Assertion (A): Methy red has `K_(a) = 10^(-5)`and the acid form, "Hin" is red and its conjugate base `Ind^(Theta)` is yellow.
Reason (R) : `{:(pH=,3,5,7,),((["Ind"^(Theta)])/(["Hin"])=,10^(-2),1,10^(2),),("Colour" =,"Red","Orange","Yellow",):}`

A

If both (A) and (R) are correc, and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct but (R) is not the correct explanation of (A).

C

If (A) is correct, but (R) is incorrect.

D

If (A) is incorrect, but (R) is correct.

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Exercises Integer|10 Videos
  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Exercises True/ False|10 Videos
  • IONIC EQUILIBRIUM

    CENGAGE CHEMISTRY|Exercise Exercises Single Correct|121 Videos
  • HYDROGEN, WATER AND HYDROGEN PEROXIDE

    CENGAGE CHEMISTRY|Exercise Subjective Archive (Subjective)|3 Videos
  • ISOMERISM

    CENGAGE CHEMISTRY|Exercise Assertion-Reasoning Type|1 Videos

Similar Questions

Explore conceptually related problems

Methy 1 red has a K_(a) = 10^(-5) . The acid form "Hin" is red and its conjugate base, Ind^(Θ) is yellow. Complete the following table: {:("pH",3,5,7),(["Ind"^(Theta)]//["HIn"],-,-,-),("Colour",-,-,-):}

If K_(a)=10^(-5) for a weak acid, then pK_(b) for its conjugate base would be

An acid-base indicator has K_(a) = 3.0 xx 10^(-5) . The acid form of the indicator is red and the basic form is blue. Then:

An acid-base indicator has a K_(a) = 3.0 xx 10^(-5) . The acid form of the indicator is red and the basic form is blue. Then

An acid-base indicator has K_(a) = 10^(-5) . The acid form of the indicator is red and basic form is blue. Which of the following is//are correct?

Acid-base indicator such as methy 1 orange, phenolphthalein, and bromothymol blue ate substances which change colour accroding to the hydrogen ion concentration of the solution to which they are added. Most indicators are weak acids (or more rarely weak base) in which the undissociated and dissociated forms have different and distinct colours. If methy 1 orange is used as the examples and the un-dissociated forms is written as HMO , then dissociation occurs as shown below: Reaction: {:(HMOhArr,H^(o+)+,MO^(Theta),,),(Red,"Colourless","Yellow",,):} The indicator should have a sharp colour change with the equivalence point of the titration. Usually the colour change of the indicator occurs over a range of about two pH units. It should be noted that the eye cannot detect the exact end point of the tiytration. The pK_(a) of the indicator should be near the pH of the solution at the equivalance point. Given that the K_(a) (methy 1 orange) = 4.0 xx 10^(-4) , a solution at pH = 2 containing the indicator would be

Acid-base indicator such as methy 1 orange, phenolphthalein, and bromothymol blue ate substances which change colour accroding to the hydrogen ion concentration of the solution to which they are added. Most indicators are weak acids (or more rarely weak base) in which the undissociated and dissociated forms have different and distinct colours. If methy 1 orange is used as the examples and the un-dissociated forms is written as HMO , then dissociation occurs as shown below: Reaction: {:(HMOhArr,H^(o+)+,MO^(Theta),,),(Red,"Colourless","Yellow",,):} The indicator should have a sharp colour change with the equivalence point of the titration. Usually the colour change of the indicator occurs over a range of about two pH units. It should be noted that the eye cannot detect the exact end point of the tiytration. The pK_(a) of the indicator should be near the pH of the solution at the equivalance point. Which of the following sitution exists at the equivalence point of titration?

Assertion (A): The amino acid glycine predominatly exists in the form of ^(o+)NH_(3)CH_(2)COO^(Theta) . Reason (R) : The conjugate acid of glycine is NH_(2)CH_(2)COO^(Theta) .

pH at which an acidic indicator with K_("in")=1xx10^(-5) changes colour when the indicator is 1xx10^(-3) M is

CENGAGE CHEMISTRY-IONIC EQUILIBRIUM-Exercises Assertion-Reasoning
  1. Assertion (A): A solution contains 0.1M each of pB^(2+), Zn^(2+),Ni^(2...

    Text Solution

    |

  2. Assertion (A): Solubility of AgCN in acidic solutions is greater than ...

    Text Solution

    |

  3. Assertion (A): Methy red has K(a) = 10^(-5)and the acid form, "Hin" is...

    Text Solution

    |

  4. Assertion (A) : On cooling in a freezing mixture, colout of the mixtur...

    Text Solution

    |

  5. Assertion (A): Due to common ion effect, the solubility of HgI(2) is e...

    Text Solution

    |

  6. Assertion (A): pK(a) of a weak acid become equal of the pH of the solu...

    Text Solution

    |

  7. Assertion (A): pH of HCI solution is less than that of acetic acid of ...

    Text Solution

    |

  8. Assertion (A): pH value of HCN solution decreases when NaCN is added t...

    Text Solution

    |

  9. Assertion (A): pH of water increases with an increase in temperature. ...

    Text Solution

    |

  10. Assertion (A): Na(2)S(2)O(3) is a salt of unstable acid. Reason (R) ...

    Text Solution

    |

  11. Assertion (A): When a solution of CH(3)COOH in water is shaken with ch...

    Text Solution

    |

  12. Assertion (A): There is very little difference in acid strength of H(3...

    Text Solution

    |

  13. Assertion (A): Both reactions are Lewis acid-base recations? i. NH(3...

    Text Solution

    |

  14. Assertion (A): Solution of AICI(3) in water is neutral. Reason (R) :...

    Text Solution

    |

  15. Assertion (A): In dilute benzene solutions, equimolar addition of R(3)...

    Text Solution

    |

  16. Assertion (A): A certain recation is catalysed by acids and the cataly...

    Text Solution

    |

  17. Assertion (A): S reacts with SO(3)^(2-) and forms S(2)O(3)^(2-) Reas...

    Text Solution

    |

  18. Assertion (A): The amino acid glycine predominatly exists in the form ...

    Text Solution

    |

  19. Assertion (A): Sb^(3+) is not precipitated as sulphide when H(2)S (g) ...

    Text Solution

    |

  20. Assertion (A): Addition of Ag^(o+) ions to a mixture of aqueous NaCI a...

    Text Solution

    |