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Lucas test is used to make distinguation...

Lucas test is used to make distinguation between `1^(@), 2^(@) and 3^(@)` alcohols.
`ROH+underset("conc.")(HCl)overset("anydrous ZnCl"_(2))rarr underset("whiteturvidity")(RCl darr)+H_(2)O`
This shown that -

A

ROH behaves as a base greater the value of `pK_(a)` (alcohol), greater reactivity with conc. HCl and thus sooner the formation of white turbidity.

B

Alcohol which reacts fastest with Na metal, will give turbidity at fastest rate

C

alcohol which reacts fastest with Na metal, will give turbidity at fastest rate.

D

Alcohol which gives red colour during victor mayor test, will always give turbidity at slowerrate then those giving blu or white colour during victor mayor test.

Text Solution

Verified by Experts

The correct Answer is:
A, B
`-`Proton act or lone pair donor are lewis base
-HCl is proton donor (acid)

R-OH act as base, greater the pKa value of `R-OH` greater will basic nature, greater will tendency to donate lone pair a to take `H^(o+)`.
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BANSAL-ALCOHOL, ETHERS & PHENOL, OXIDATION & REDUCTION -Exercise 2
  1. Compound which gives alcohol on reduction is/are

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  2. Select the correct synthesis products

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  3. Lucas test is used to make distinguation between 1^(@), 2^(@) and 3^(@...

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  4. End-product of which of following reaction give positive Iodoform test...

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  5. Dehydration of alcohols take place more rapidly with POCl(3) than with...

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  6. Consider the following compound A (below) Select the correct statement...

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  7. Which of the following are possible products in the above reaction?

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  8. Products form by following reactions are

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  9. C(2)H(5)NH(2)underset("reagent")overset("Tilden")to(i)overset(NH(3))to...

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  10. Which of the following reaction represent major product.

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  11. Which of the following will get oxidised by Br(2)//KOH into carboxylic...

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  12. Diethyl ether reacts with PCl(5) to form

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  13. Which method is useful for the synthesis of ether?

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  14. Which is/are correct statement?

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  15. In the reaction the intermediate (s) is/are

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  16. CH(3)-underset(CH(3))underset(|)(C)H-CH=CH(2)=overset("Reagent")toAlco...

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  17. Match the column

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  18. Match the column

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  19. Match structures given in list I with names given in list II and then ...

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  20. Match this list I with list II and then select the answer from the cod...

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