Isomerism- Class 12th

Isomerism that arises out of the difference in spatial arrangement of atoms or groups about the doubly bonded carbon atoms are called?

• Structural Isomerism

• Stereoisomerism

• Geometrical Isomerism

• Optical Isomerism

Isomerism exhibited by acetic acid and methyl formate is

• position

• chain

• functional

• metamerism

How to determine that a molecule exhibit cis-trans isomerism?

• Restricted rotation in a carbon-carbon single bond of alkenes

• Each carbon of a site of restricted rotation has 2 different atoms or groups attached to it

• Exist in cyclic compouds only

• Similar chemical properties

the molecule contains cis-trans isomerism because the C=C double bond is restricted to rotation

• TRUE

• FALSE

A structural isomer of pentane is?

• 2-methyl butane

• 2,2-dimethyl octane

• 1-methyl propane

• 1-methyl pentane

Most stable conformation of cyclohexane is

• chair

• boat

• twist boat

• half chair

What is E-Z isomerism?

• An E isomer is where molecules with atoms or groups on opposite sides.

• E-Z isomerism is another way of naming structural isomers.

• A Z isomer is where molecules with atom or groups are on the same side.

• An example of chain isomerism.

Which structural formula represents a molecule that is not an isomer of pentane?

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The number of structural isomers for C₆H₁₄ is

• 3

• 4

• 5

• 6

Which of the following compounds is not chiral?

(1) 1-chloropentane

(2) 3-chloro-2-methyl pentane

(3) 1-chloro -2-methyl pentane

(4) 2-chloropentane

• 1

• 2

• 3

• 4