Answers are given in the end.

Questions useful in Board Examination.

1. What is chirality?

2.Which compounds are chiral ?

3.What do you mean chiral centre?

4.What are the stereoisomers ?

5.What are the diastereomers ?

6.What is racemic mixture?

7.What is racemization ?

8.What do you mean retention of configuration ?

9.What do you mean by inversion of configuration ?

10.Whats the different between S_N1 and S_N2 Reaction mechanism?

Answers-

1.Chirality is the property of non-superimposability of an object over its mirror image.

2.The compound having chiral / asymmetric carbon is chiral.

3.The carbon bonded with four different atoms/ functional group is called chiral centre.

4.Enantiomers are the isomers which are non superimposable mirror images.

5.The stereoisomers which are not mirror images of each othr are called diastereomer.

6.The equimolar mixture of enentiomers which is optically inactive is called racemic mixture.

7.The reaction in which either of enantiomer is changed into racemic mixture ( Product ).If reactant is dextro rotatory or leavo rotatory than product is equimolar mixture of dextro and leavo rotatory.

8.The reaction in which product have same optical properties as reactant. If reactant is dextro rotatory than product is also dextro rotatory.

9.The reaction in which the optical property of reactant is inverted. If reactant is dextro rotatory than product will be leavo rotatory.

10. Difference between S_N1 and S_N2 Reaction mechanism

Point of difference	SN1	SN2
1.Type	Unimolecular	Bimolecular
2.Involvement of Transition State	No	Yes
3.Involvement of carbocation	Yes	No
4.Configuration of product or process	Racemic mixture	Inversion of configuration