Question

1a. In organic chemistry, reduction can be defined as:

Select one:

a. the addition of an oxygen bond

b. the addition of a halogen bond

c. none of these are correct

d. the addition of a hydrogen bond

1b. Reducing a double bond to create a secondary alcohol will require what type of starting substrate?

Select one:

a. aldehyde

b. alkyne

c. ketone

d. alkene

1c. Which of the following reaction is NOT an oxidation reaction?

Select one:

a. H2C=O→HCOOH

b. CH3OH→H2C=O

c. CH4→CH3OH

d. CO2 → HCOOH

1d. Which of the following reagent, does NOT have a nucleophilic carbon?

Select one:

a. CH3CH2ONa

b. CH3Li

c. CH3CH2MgCl

d. . CH3MgBr

Answer 1

1a. Addition of a hydrogen atom or gain of electrons to decrease the oxidation state is considered as reduction reaction. Hence, option D is correct.

1b. Ketones are reduced to secondary alcohols in a reduction reaction. Hence, option C is correct.

1c. Carbon aton in CO₂ has an oxidation state of +4, while in HCOOH it has OS of +2. So, that'd make this conversion a reduction reaction. Hence, option D is correct.

1d. All the molecules listed here are nucleophiles.