Question

1) CH3CHO is first in series, known as formaldehyde.
2). Metal with mineral acids, liberate hydrogen gas.
Different metals are extracted by different processes.
guys answer me ​

Answer 1

1. The statement is false since CH₃CHO is not the first member of the series. CH₃CHO is called Acetaldehyde ( IUPAC: Ethanal ). The first member is Formaldehyde having the formula HCHO.
2. Not all metals are capable of liberating hydrogen gas with mineral acids. Metals which lie below Hydrogen in the reactivity series ( like Cu, Ag etc) are not capable of liberating hydrogen from mineral acids.
3. Different metals are extracted by different processes as they differ in their reactivity.

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Answer 2

Answer:

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