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Which solution is used by traffic police...

Which solution is used by traffic police to test that a person is drunk?

A

Acidified `K_2Cr_2O_7`

B

Acidified `KMnO_4`

C

Acidified `K_2MnO_4`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
Hint : Acidified Potassium Dichromate `(K_2Cr_2O_7)` is used which has orange colour. The person who has consumed alcohol when breathes in this solution, the orange colour will change into green due to the oxidation of alcohol and reduction of `K_2Cr_2O_7`, to green coloured chromium sulphate `Cr_2(SO_4)_3`.
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ACCURATE PUBLICATION-D & F BLOCK ELEMENTS -2 OR 5 MARKS QUESTIONS
  1. Which solution is used by traffic police to test that a person is drun...

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  2. What are transition elements ? Which of the d block elements are not r...

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  3. What are the characteristics of the transition elements ?

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  4. In what way is the electronic configuration of transition elements dif...

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  5. Why is Copper considered as transition metal ?

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  6. Scandium (z = 21) is a transition element but zinc (z = 30) is not. Ex...

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  7. Sliver atom has completely filled d-orbitals (4d^10) in its ground sta...

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  8. [Ti (H2O)6]^(3+) is coloured while [Sc(H2O)6]^(3+) is colourless. Expl...

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  9. Explain why TiCl3 is coloured but TiCl4 is colourless ?

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  10. Explain why [Ti (H2O)6]^(3+) is violet while [Ti (H2O)6]^(4+) is colou...

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  11. Why Cd^(2+) salts are white ? Cd=48

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  12. Which of the two is paramagnetic V(IV) or V(V) and why ?

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  13. Why does Mn(II) shows maximum paramagnetic character among the dival...

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  14. Name the elements represented by following symbols : Hg , Pb , Au , Ag...

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  15. What is atomicity ? Explain with two examples.

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  16. What is the atomicity of the following : oxygen

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  17. Explain why Cu(I) is diamagnetic while Cu(II) is paramagnetic in natur...

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  18. Transition metals have high melting points and boiling points. Why?

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  19. What is the atomicity of the following : ozone

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  20. What is the atomicity of the following : neon

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  21. What is the atomicity of the following : phosphorous

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