Match the following : Test/Method Reagent (i) Lucas Test (a) C 6 H 5 SO 2 Cl / aq . KOH (ii) Dumas method (b) HNO 3 / AgNO 3 (iii) Kjeldahl's method (c) CuO / CO 3 (iv) Hinsberg Test (d) Conc. HCl and ZnCl 2 (e) H 2 SO 4

(i)-(b), (ii)-(d), (iii)-(e), (iv)-(a)

(i)-(d), (ii)-(c), (iii)-(b), (iv)-(e)

(i)-(d), (ii)-(c), (iii)-(e), (iv)-(a)

(i)-(b), (ii)-(a), (iii)-(c), (iv)-(d)

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Three alcohols
$(i)$ $C H_{3} C H_{2} C H_{2} O H,$
$(i i)$ $C H_{3} - C H O H - C H_{3}$ and
$(i i i)$ $C H_{3} - C (C H_{3}) (O H) - C H_{3}$
were treated seperately with Lucas reagent (Conc. $H C l + Z n C l_{2}) .$ What results do you expect at room temperature

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Important Questions on Alcohols, Phenols and Ethers

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Which of the following will not give iodoform test?

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Iodoform is obtained on heating the reaction of

I_{2}

and

NaOH

with

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

The compound which does not respond to iodoform test is

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Ceric ammonium nitrate and

{CHCl}_{3} / alc

KOH

are used for the identification of functional groups present in _ and _ respectively.

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Two compounds $A$ and $B$ with same molecular formula $(C_{3} H_{6} O)$ 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

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Amongst the following alcohols, the one that would react fastest with conc.

HCl

and anhydrous

{ZnCl}_{2}

is:

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Which of the following would give iodoform test?

Question Image

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Match the following

	Column-1 Compound/ reagent		Column-2 Other name / Chemical / Name of the process
A	Methanol	I	Lucas reagent
B	${ZnCl}_{2} / Conc . HCl$	II	Baeyer's reagent
C	Rectified spirit	III	Wood spirit
D	Dil. ${KMnO}_{4}$	IV	$95 % C_{2} H_{5} OH$
		V	$75 % C_{2} H_{5} OH$
		VI	$90 % C_{3} H_{7} OH$

The correct match is

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Match the following :

	Test/Method		Reagent
(i)	Lucas Test	(a)	$C_{6} H_{5} {SO}_{2} Cl / aq . KOH$
(ii)	Dumas method	(b)	${HNO}_{3} / {AgNO}_{3}$
(iii)	Kjeldahl's method	(c)	$CuO / {CO}_{3}$
(iv)	Hinsberg Test	(d)	Conc. $HCl$ and ${ZnCl}_{2}$
		(e)	$H_{2} {SO}_{4}$

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Which one among the following reaction products gives iodoform test?

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Iodoform test is not given by

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

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:

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

A compound

' A'

of molecular formula

C_{4} H_{10} O

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

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

A compound that gives positive iodoform test is

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Which of the following compounds reacts immediately with Lucas reagent?

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Which of the following method may be used to distinguish between primary, secondary and tertiary alcohols?

HARD

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Question Image

What are $A, B$ and $C$ compounds?

EASY

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

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

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

Consider the following reaction:

Question Image

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

MEDIUM

Chemistry>Organic Chemistry>Alcohols, Phenols and Ethers>Tests of Alcohols

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

I. $C H_{3} C H_{2} O H + H C l \overset{A n h y d . Z n C l_{2}}{\to}$

II. $C H_{3} C H_{2} O H + H C l ⟶$

III. ${(C H_{3})}_{3} C O H + H C l ⟶$

IV. ${(C H_{3})}_{2} C H O H + H C l \overset{A n h y d . Z n C l_{2}}{\to}$

Three alcohols (i) CH3CH2CH2OH, (ii) CH3-CHOH-CH3 and (iii) CH3-C(CH3)(OH)-CH3 were treated seperately with Lucas reagent (Conc. HCl+ZnCl2). What results do you expect at room temperature

Important Questions on Alcohols, Phenols and Ethers

Learn and Prepare for any exam you want !

Three alcohols
$(i)$ $C H_{3} C H_{2} C H_{2} O H,$
$(i i)$ $C H_{3} - C H O H - C H_{3}$ and
$(i i i)$ $C H_{3} - C (C H_{3}) (O H) - C H_{3}$
were treated seperately with Lucas reagent (Conc. $H C l + Z n C l_{2}) .$ What results do you expect at room temperature