1.

Which of the following statement is correct ? P) pyruvic acid gives haloform test Q) pyruvic acid gives tollen's test R) pyruvic acid undergoes decarboxylation with warm. dil H_2 SO_4 and gives CH_3 CHO S) pyruvic acid undergoes decarbonylation with warm, conc.H_2 SO_4, and gives CH_3 COOH

Answer»

P,Q,R,S
P,Q,R only
R,Q only
Only P

Solution :`CH_3 - overset(O)overset(||)C-COOH` (PYRUVIC ACID)
P) Due to the presence of `CH_3-overset(O)overset(||)` group it GIVES haloform TEST
Q) It undergoes decarboxylation and gives `CH_3 CHO`. Hence it gives tollen.s test


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