CHEMISTRY TEXTBOOK

1. Choose the most correct option.

i. In the following resonating structures

A and B, the number of unshared

electrons in valence shell present on

oxygen respectively are

d.

a. 2, 4 b. 2, 6

c. 4, 6 d. 6, 4

ii. In the Wolf -Kishner reduction, alkyl

aryl ketones are reduced to alkyl

benzenes. During this change, ketones

are first converted into

a. acids b. alcohols

c. hydrazones d. alkenes

iii. Aldol condensation is

a. electrophilic substitution reaction

b. nucleophilic substitution reaction

c. elimination reaction

d. addition - elimination reaction

iv. Which one of the following has lowest

acidity?

a.

NO 2

COOH

Cl

COOH

OCH 3

COOH

COOH

v. Diborane reduces

a. ester group b. nitro group

c. halo group d. acid group

vi. Benzaldehyde does NOT show positive

test with

a. Schiff reagent

b. Tollens' ragent

c. Sodium bisulphite solution

d. Fehling solution

2. Answer the following in one sentence
   i. What are aromatic ketones?
   ii. Is phenyl acetic acid an aromatic
   carboxylic acid?
   iii. Write reaction showing conversion of
   ethanenitrile into ethanol.
   iv. Predict the product of the following
   reaction:

CH 3 CH 2 COOCH 3 i. AlHii. H^ (i-Bu)^2

3 O⊕

?

b.

c.

v. Name the product obtained by reacting

toluene with carbon monoxide and

hydrogen chloride in presence of

anhydrous aluminium chloride.

vi. Write reaction showing conversion of

Benzonitrile into benzoic acid.

vii. Name the product obtained

by the oxidation of

1,2,3,4-tetrahydronaphthalene with

acidified potassium permanganate.

viii.What is formalin?

C

O

C

O

(A) (B)

⊕

Exercises