Question

The $$(R)$$ - and $$(S)$$ - enantiomers of an optically active compound differ in

A. their solubility in a chiral solvent
B. their reactivity with a chiral reagent
C. their optical rotation of plane polarised light  
D. their melting points
Answer :   their optical rotation of plane polarised light
Solution :
$$R$$  and $$S$$  forms of an optically active compound differ in their behaviour towards plane polarised light. The species which rotate the plane polarised light towards right is called $$R$$ - form ( $$rectus$$  form ) or $$d$$ - form ( $$dextro$$  - form ) and the species which rotate the plane polarised light towards left is known as $$S$$ - form ( $$sinister$$  - form ) or $$l$$ - form ( $$laevo$$  - form ).

Releted MCQ Question on
Organic Chemistry >> General Organic Chemistry

Releted Question 1

The bond order of individual carbon-carbon bonds in benzene is

A. one
B. two
C. between one and two
D. one and two alternately
Releted Question 2

Molecule in which the distance between the two adjacent carbon atoms is largest is

A. Ethane
B. Ethene
C. Ethyne
D. Benzene
Releted Question 3

Among the following, the compound that can be most readily sulphonated is

A. benzene
B. nitrobenzene
C. toluene
D. chlorobenzene
Releted Question 4

The compound 1, 2-butadiene has

A. only $$sp$$   hybridized carbon atoms
B. only $$s{p^2}$$ hybridized carbon atoms
C. both $$sp$$  and $$s{p^2}$$ hybridized carbon atoms
D. $$sp$$ , $$s{p^2}$$ and $$s{p^3}$$ hybridized carbon atoms

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