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Potassium dicharomate solution is used t...

Potassium dicharomate solution is used to test drunker driver? Discuss.

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Aqueous solution of potassium dichromate is orange. The driver is asked to breath into the solution. If the solution changes to green, the driveris in drunken state. This is because dichromate oxidises ethanol to acetic acid and itself is reduced to green chromic salt in solution.
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AAKASH SERIES-D-BLOCK ELEMENTS-OBJECTIVE EXERCISE-4 (ASSERTION (A) & REASON (R) TYPE QUESTIONS )
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  3. (A): Sc^(+3) ion in aqueous solutions is colorless (R) : Ions with d...

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  4. (A): The spin only magnetic moment of Sc^(+3) 1.73 BM (R) : The spin...

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  5. (A) Cu^(+) is diamagnetic (R) Ions With d^(10) configuration are dia...

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  6. (A): Transition elements form alloys easily (R) : Transition element...

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  7. (A): Transition elements form alloys very easily. (R): They exhibit ...

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  8. (A): Outermost electronic configuration of Pt is 5d^(9)s^(1) (R) : ...

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  9. (A): Elements of second and third transition series have nearly same a...

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  10. (A) : Transition metals form colored ions (R): They have completely ...

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  11. (A): Magnetic moment of Mn^(+2) is 5.8 B.M (R): Mn^(+2) has five unp...

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  12. (A) : Cu^(+2)(aq) is more stable than Cu^(+)(aq) (R): Heat of hydrat...

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  13. (A): Zn(II) compounds are diamagnetic. (R): Zn(II) has all its elect...

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  14. (A): FeO is basic in character. (R): Oxides of transition metals are...

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  15. (A): Pyrolusite is an ore of manganese. (R) : Formula of pyrolusite ...

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  16. (A): Equivalent mass of K(2)Cr(2)O(7), when it acts as oxidizing agent...

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  17. (A): Ti(IV) in aqueous solutions is colour less. (R): Ti(IV) has no ...

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  18. (A): In alkaline medium, KMnO(4) oxidizes iodides to iodates. (R): K...

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  19. (A): Zr and Hf have nearly equal atomic radii. (R): Zr and Hf belong...

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  20. (A) Scandium is the lightest transition metal, (R) Atomic radius of ...

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  21. (A) The most common oxidation state of lanthanides is + 3. (R) Lanth...

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