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JEE Chemistry Solved Question Paper 2008

Multiple Choice Questions

31.

Which of the following is a ketohexose?

Glucose
Sucrose
Sucrose
Ribose

32.

Reaction of PCl₃ and PhMgBr would give

bromobenzene
chlorobenzene
triphenylphosphine
dichlorobenzene

33.

Hydroboration oxidation of 4-methyl octene would give

4-methyl octanol
2-methyl decane
4-methyl heptanol
4-methyl-2-octanone

34.

When ethyl alcohol is heated with conc. H₂SO₄, the product obtained is

CH₃COOC₂H₅
C₂H₂
C₂H₆
C₂H₄

35.

Anisole is the product obtained from phenol by the reaction known as

coupling
etherification
oxidation
esterification

36.

Ethylene glycol gives oxalic acid on oxidation with

acidified K₂Cr₂O₇
acidified KMnO₄
alkaline KMnO₄
periodic acid

37.

A Wittig reaction with an aldehyde gives

ketone compound
a long chain fatty acid
olefin compound
epoxide

38.

Cannizaro reaction is given by

HCHO
>C(OH)COOH
>CHCH₂CHO
CH₃CH₂OH

39.

Identify the reactant.

H₂O
HCHO
CO
CH₃CHO

40.
Maleic acid and fumaric acid are

position isomers

geometric isomers

enantiomers

functional isomers

geometric isomers

The structures of maleic and fumaric acids are given below:

The structures of fumaric and maleic acid suggest that they are geometrical isomers because they have same molecular formula but different spatial arrangement of atoms around a double bond.
When the similar groups are present on same side of double bond, the isomer is called cis and when different groups are present on same side of double bond, then the isomer is called trans. Hence, maleic acid is cis form and fumaric acid is trans form.