Isomers of a substance must have the same-         

1. Structure

2. Physical properties

3. Chemical properties

4. Molecular formula

But-2-ene exhibits cis-trans-isomerism due to

1. rotation around C₂-C₃ double bond

2. rotation around C₃-C₄ sigma bond

3. rotation around C₁-C₂ bond

4. restricted rotation around C=C bond

How many stereoisomers does this molecule have?           

CH₃CH=CHCH₂CHBrCH₃

1. 4       

2. 6       

3. 8       

4. 2

The general formula for cycloalkanes is:

1. C_nH_2n+2 

 2. C_nH_2n

3. C_nH_2n-2  

4. C_nH_2n+1

If optical rotation produced by the compound (i) is +52° then that produced by that the compound (ii) is:

1. -52°

2. +52°

3. 0°

4. unpredictable

Rotation of plane polarized light can be measured by:

1. manometer

2. calorimeter

3. polarimeter

4. viscometer

Which one of the following can exhibit cis-trans-isomerism?

1. CH₃-CHCl-COOH

2. H-C≡C-Cl

3. Cl-CH=CHCl

4. ClCH₂-CH₂Cl

Geometrical isomers differ in :

1. Position of functional group.

2. Position of atoms.

3. Length of carbon chain.

4. Spatial arrangement of atoms.

Fisher projection indicates:

1. horizontal substituents above the plane

2. vertical substituents above the plane

3. both horizontal and vertical substituents below the plane

4. both horizontal and vertical substituents above the plane

Select the correct option:-

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1. resonating structures

2. tautomers

3. geometrical isomers

4. optical isomers