Home
Class 12
CHEMISTRY
Assertion : Change in colour of the acid...

Assertion : Change in colour of the acidic solution of breath is used as a test for drunken driver.
Reason : Change in colour is due to complexation of alcohol with potassium dichromate.

Text Solution

Verified by Experts

Correct R. Acidified `K_(2)Cr_(2)O_(7)` solution oxidizes alcohol and itself is reduce to `Cr_(2)(SO_(4))_(3)` which is green in colour.
Promotional Banner

Topper's Solved these Questions

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise IMPORTANT QUESTIONS|30 Videos

  • D- AND F-BLOCK ELEMENTS

    PRADEEP|Exercise ASSERTION-REASON TYEP QUESTIONS(TYPE 1)|7 Videos

  • CORDINATION COMPOUNDS

    PRADEEP|Exercise Important Questions|28 Videos

  • ELECTROCHEMISTRY

    PRADEEP|Exercise IMPORTANT QUESTIONS FOR BOARD EXAMINATION|25 Videos

Similar Questions

Explore conceptually related problems

Assertion: If a strong acid is added to a solution of potassium chromate it changes its colour from yellow to orange. Reason: The colour change is due to the oxidation of potassium chromate.

The colour of potassium dichromate is due to

Assertion : The aqueous solution of FeCl_(3) is basic in nature. Reason : The colour changes due to the oxidation of potassium chromate.

Assertion : Chamaeleon can change its colour . Reason : It is a fashionable animal .

(a). Assertion (A) is true, Reason (R) is also true, Reason (R) is the correct explanation for assertion (A). (b). Assertion (A) is true, Reason (R) is true, Reason (R) is not the correct explanation for Assertion (A). (c). Assertion (A) is true, Reason (R) is false. (d). Assertion (A) is false, Reason (R) is true. Q. Assertion (A): to a solution of potassium chromate, if a strong acid is added, it changes its colour from yellow to orange. Reason (R): The colour change is due to the change in oxidation state of potassium chromate.

Assertion : Hydra is green coloured. Reason : Green colour is due to the presence of chlorophyll in their body wall.

A solution changes the colour of turmeric indicator from yellow to red . The solution is

PRADEEP-D- AND F-BLOCK ELEMENTS-ASSERTION-REASON TYEP QUESTIONS(TYPE II)
  1. Assertion: Mercury is not considered as a transition element. Reason...

    Text Solution

    |

  2. Assertion: Cu, Ag and Au lie in Group 11 of the periodic table. Hence ...

    Text Solution

    |

  3. Assertion: The second ionisation energies of V, Cr and Mn are in the o...

    Text Solution

    |

  4. Assertion: Tungsten has very high melting point. Reason: Tungsten is...

    Text Solution

    |

  5. Assertion: Mn atom loses ns electrons first during ionisation as compa...

    Text Solution

    |

  6. Assertion: E^(ɵ) for (Mn^(3+))/(Mn^(2+)) is more positive than for (Cr...

    Text Solution

    |

  7. Assertion : Mercury vapour is shining silvery in appearance. Reason ...

    Text Solution

    |

  8. Statement : Aufbau rule is violated in writing electronic configuratio...

    Text Solution

    |

  9. Assertion: Equivalent mass of KMnO4 is same in the neutral as well as ...

    Text Solution

    |

  10. Assertion: In Cr2O7^(2-) ion, all the Cr-O bond lengths are equal. R...

    Text Solution

    |

  11. Assertion: K2Cr2O7 is used as primary standard in volumetric analysis....

    Text Solution

    |

  12. Assertion : Change in colour of the acidic solution of breath is used ...

    Text Solution

    |

  13. Assertion: The purple colour of KMnO4 is due to the charge transfer tr...

    Text Solution

    |

  14. Assertion (A) Cu (II) iodide is not known. Reason (R ) Cu^(2+) oxidi...

    Text Solution

    |

  15. Assertion.Atomic size of silver is almost the same as that of gold. ...

    Text Solution

    |

  16. Assertion (A) Separation of Zr and Hf is difficult. Reason (R ) Bec...

    Text Solution

    |

  17. Assertion. Actinoids show larger number of oxidation states than lant...

    Text Solution

    |