Correct Answer: 2 and 4
Explanation:
Both Formaldehyde and Acetaldehyde will give this test
H C H O → [ A g ( N H 3 ) 2 + ] S i l v e r m i r r o r A g + O r g a n i c c o m p o u n d
C H 3 - C H O → [ A g ( N H 3 ) 2 + ] A g S i l v e r m i r r o r + O r g a n i c c o m p o u n d
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