Nucleophilic Addition at the Carbonyl

Q.

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

1. MeCOCl
2. MeCOOMe
3. MeCHO
4. MeCOOCOMe

Q.

In the nucleophilic addition of CN^- to carbonyl carbon, the intermediate formed is

1. Planar

2. Tetrahedral

3. Cyclic

4. Pyramidal

Q.

Ethyl magnesium iodide reacts with which of the following compound to give 2 - methyl butan - 2 - ol after hydrolysis?

1. Formaldehyde

2. Acetaldehyde

3. Acetone

4. Either acetaldehyde or acetone

Q.

In the nucleophilic addition of CN^-1 to carbonyl compound the intermediate formed is

1. Planar

2. Cyclic

3. Pyramidal

4. Tetrahedral

Q. The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds

and I II III <!--td {border: 1px solid #cccccc;}br {mso-data-placement:same-cell;}--> AIPMT MAIN 2011

1. $II>I>III$
2. $III>II>I$
3. $I>III>II$
4. $I>II>III$

Q. One mole of an organic compound requires half mole of oxygen to give an acid. The compound may be

1. Alcohol
2. Ketone
3. Ether
4. Aldehyde

Q. Which of the following will not give haloform reaction?

1. Acetone
2. Pentan-2-one
3. Pentan-3-one
4. Butanone

Q. Acetadehyde reacts with thionyl chloride to give (the main product)

1. $C{H}_{3}COCl$
2. $C{H}_{3}C{H}_{2}COCl$
3. $C{H}_{3}C{H}_{2}CHC{l}_2$
4. $C{H}_{3}CHC{l}_2$

Q. Oxidation of a compound ‘X’ gives a product which reacts with phenyl hydrazine but does not give a sliver mirror test. The structure of ‘X’ is

1. $C{H}_{3}CHO$
2. $C{H}_{3}C{H}_{2}OH$
3. $C{H}_{3}C{H}_{2}C{H}_{2}OH$
4. $(C{H}_3{)}_{2}CHOH$

Q.

1. Any value of P^H

2. P^H = 1

3. P^H = 4.5

4. P^H = 12