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

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