HARD
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Identify pair of compounds which can be distinguished by iodoform test?

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Important Questions on Alcohols, Phenols and Ethers

MEDIUM

Which of the following reaction(s) can be used for the preparation of alkyl halides?

I. CH3CH2OH+HClAnhyd. ZnCl2

II. CH3CH2OH+HCl

III. CH33COH+HCl

IV. CH32CHOH+HClAnhyd. ZnCl2

EASY
The compound which does not respond to iodoform test is
EASY
A compound that gives positive iodoform test is
MEDIUM
Which one among the following reaction products gives iodoform test?
EASY
Ceric ammonium nitrate and CHCl3/alc. KOH are used for the identification of functional groups present in _ and _ respectively.
MEDIUM
Which of the following will not give iodoform test?
MEDIUM

Consider the following reaction:

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The product'P'gives positive ceric ammonium nitrate test. This is because of the presence of which of theseOH group(s)?

 

EASY

Which of following alcohols gives white turbidity almost immediately with the Lucas reagent at room temperature?

(i) n-Butanol

(ii) tertiary-Butanol

(iii) Benzyl alcohol

(iv) Allylic alcohol

MEDIUM
Iodoform is obtained on heating the reaction of I2 and NaOH with
HARD

Two compounds A and B with same molecular formula C3H6O undergo Grignard reaction with methylmagnesium bromide to give products C and D. Products C and D show following chemical tests.

Test C D
Ceric ammonium nitrate Test Positive Positive
Lucas Test Turbidity obtained after five minutes Turbidity obtained Immediately
Iodoform Test Positive Negative

C and D respectively are

HARD
A compound 'A' of molecular formula C4H10O on treatment with Lucas' reagent at room temperature gives a compound 'B'. When the compound 'B' is heated with alcoholic KOH, it gives isobutene. The compound 'A' and 'B' respectively are
MEDIUM
Amongst the following alcohols, the one that would react fastest with conc. HCl and anhydrous ZnCl2 is:
EASY
Which of the following compounds reacts immediately with Lucas reagent?
MEDIUM

Which is the most suitable reagent for the following transformation?
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MEDIUM

Number of compounds giving (i) red colouration with ceric ammonium nitrate and also (ii) positive iodoform test from the following is _________

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MEDIUM

Which of the following would give iodoform test?

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MEDIUM

Match the following :

  Test/Method   Reagent
(i) Lucas Test (a) C6H5SO2Cl/aq. KOH
(ii)  Dumas method (b) HNO3/AgNO3
(iii) Kjeldahl's method (c) CuO/CO3
(iv) Hinsberg Test (d) Conc. HCl and ZnCl2
    (e) H2SO4

 

MEDIUM
An unknown alcohol is treated with the "Lucas reagent" to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism: