Tests of Alcohols

IMPORTANT

Tests of Alcohols: Overview

This topic covers concepts, such as, Methods to Distinguish Primary, Secondary and Tertiary Alcohols, Lucas Test, Some Other Tests of Alcohols & Iodoform Test etc.

Important Questions on Tests of Alcohols

MEDIUM
IMPORTANT

The chemical tests used to distinguish between compounds in the following pairs of substances are

(i) Ethanal and propanal

(ii) Benzoic acid and ethyl benzoate

HARD
IMPORTANT

From amongst the following alcohols the one that would react fastest with concentrated HCl and anhydrous ZnCl2 , is

EASY
IMPORTANT

Decribe dichromate test for alcohols?

EASY
IMPORTANT

Describe Ritter test for alcohols?

EASY
IMPORTANT

describe chromic acid test for alcohols?

MEDIUM
IMPORTANT

Which of the following reacts fastest with a mixture of anhydrous ZnCl2 and concentrated HCl?

EASY
IMPORTANT

Match the following

  Column I   Column II
(A) Lucas reagent (I) SnCl2+HCl,H3O+
(B) Clemmensen reagent (II) AgNH32+
(C) Tollens'reagent (III) Anhydrous ZnCl2 conc. HCl
(D) Stephen reaction (IV) Zn-Hg conc. HCl
    (V) C6H5SO2Cl

HARD
IMPORTANT

Identify A,B and C in the following reactions

Isopropyl chloride NaOHACu/573 KBNaOIC+ Iodoform

HARD
IMPORTANT

C6H10O3 (Keto ester) (A)NaOH+I2Yellow precipitate+(B)H(C)-CO2CH3COOH. (A) and (B) are:

MEDIUM
IMPORTANT

Select the incorrect statements from the following:

HARD
IMPORTANT

Which of the following compounds will respond to iodoform test?

HARD
IMPORTANT

Compound (A) gives positive Lucas test in 5 minutes when 6.0 gm of (A) is treated with Na metal, 1120 ml of H2 is evolved at STP. Assuming (A) to contain one of oxygen per molecule, write structural formula of (A). Compound (A) when treated with PBr3 gives (B) which when treated with benzene in prsence of anhydrous AlCl3 gives (C). What are (B) and (C)?

MEDIUM
IMPORTANT

Compound (A) gives positive Lucas test in 5 minutes when 6.0 gm of (A) is treated with Na metal, 1120 ml of H2 is evolved at STP. Assuming (A) to contain one of oxygen per molecule, write structural formula of (A). Compound (A) when treated with PBr3 gives (B) which when treated with benzene in prsence of anhydrous AlCl3 gives (C). What are (B) and (C)?

MEDIUM
IMPORTANT

How many 1º carbon atom will be present in a simplest hydrocarbon having two 3º and one 2º carbon atom ?

HARD
IMPORTANT

Which of the following statements is correct?

EASY
IMPORTANT

The compound which reacts fastest with Lucas reagent at room temperature is

MEDIUM
IMPORTANT

The alcohol that reacts faster with Lucas reagent is

EASY
IMPORTANT

Which of the following compounds reacts immediately with Lucas reagent?

HARD
IMPORTANT

Which of the following pairs can be distinguished by using Lucas Test ?

EASY
IMPORTANT

Methanol and ethanol are distinguished by the