Compounds with oxygen

What oxidation number does the functional carbon have in aldehydes?

• -I

• 0

• +I

• +II

Answer explanation

Because carbon 's electronegativity is lower than oxygen's one but higher than hydrogen's one it is true that "+II + (-I) = +I"

What's the highest oxidation state of carbon element?

Answer explanation

Good...indeed carbon having four valence electrons...it can't have more than "+4" as oxidation number!

Give the name of one homologous series having a carbonyl group

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Answer explanation

Good! you could also have answered ketones / aldehydes.

What's the identification test that works with both aldehydes and ketones?

• 2,2-DNPH

• Fehling's test

• Haloform test

• Tollen's test

Homologous series that have lower boiling points than alcohols are:

• alkenes

• carboxylic acids

• ketones

• alkanes

The cyanide ion attacks the electrophilic site of aldehydes. Does this mechanism correspond to a substitution or an addition?

Intermolecular forces that strenghten the cohesion of alcohols in solid and liquid phases are called:

• Van der Waals forces

• London forces

• Hydrogen bonds

• Debye forces

Give the name of the carboxylic acid whose the main carbon chain is made of 6 carbon and assuming a amine group is attached to the before the last carbon.