Assertion (A): All naturally occurring α-amino acids except ...

CBSE Class 12 Chemistry 2025 All Sets Solved Paper

Question : 13 of 16

Marks: +1, -0

Assertion (A): All naturally occurring α-amino acids except glycine are optically active.
Reason (R): Most naturally occurring amino acids have L-configuration.

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
Assertion (A) is true, but Reason (R) is false.
Assertion (A) is false, but Reason (R) is true.

Solution:

All naturally occurring α-amino acids except glycine are optically active is correct.
Most naturally occurring amino acids have L-configuration is correct.
But Reason is not the correct explanation as optical activity is due to absence of symmetry elements.

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