NEETChemistryp Block Elements (Group 15, 16, 17 & 18)
Given below are two statements, one is labelled as Assertion A and the other is labelled as Reasom R . Assertion A : A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom. Reason R : A molecule with 2 chiral carbons is always optically active. In the light of above statements, chose the correct answer from the options given
Options
- AA is true but R is false
- BBoth A and R are true but R is the correct explaination of A
- CA is false but R is true
- DBoth A and R are true but R is NOT the correct explaination of A
Correct answer
A. A is true but R is false
Step-by-step solution
When glycine is treated with chlorine in presence of red phosphorus, HVZ reaction takes place i.e., substitution of chlorine takes place at alpha carbon. A molecule with two chiral carbons is not always optically active. Suppose the following compound is having two chiral carbons but optically inactive due to internal compensation of optical rotation.