Halogenation of Alpha Carbon

Q.

How do you make Aldehyde from Carboxylic acid?

Q. Which of the following carbonyl compounds do not give haloform reaction?

1. Acetaldehyde
2. Pentan-2-one
3. Acetophenone
4. Benzophenone

Q. An alkene (A) $C_{16}{H}_{16}$ on ozonolysis gives only one product (B) $C_8{H}_{8O}$. Compound (B) on reaction with $NaOH/I_2$ yields sodium benzoate. Compound (B) reacts with $KOH/N{H}_{2}N{H}_2$ yielding a hydrocarbon (C) $C_8{H}_{10}$. Write the structures of compounds (B) and (C). Based on this information two isomeric structures can be proposed for alkene (A). Deduce their structures. The isomer of (A) which on catalytic hydrogenation ($H_2/Pd-C$) gives a racemic mixture is:

1. cis-2, 3-diphenylbut-2-ene
2. trans-2, 3-diphenylbut-2-ene
3. Both the above options are appropriate candidates for "A"; both isomers on catalytic hydrogenation gives a racemic mixture
4. Neither trans-2, 3-diphenylbut-2-ene nor cis-2, 3-diphenylbut-2-ene

Q.

Ceric ammonium nitrate and CHCl₃/alc. KOH are used for the identification of functional groups present in _________and________ respectively.

1. Alcohol, amine

2. Amine, alcohol

3. Alcohol, phenol

4. Amine, phenol

Q.

Read the assertion and reason carefully to mark the correct option out of the options given below :

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

(e) If assertion is false but reason is true.

Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.

Q. Which of the following carbonyl compounds do not give haloform reaction?

1. Acetaldehyde
2. Pentan-2-one
3. Acetophenone
4. Benzophenone

Q.

Read the assertion and reason carefully to mark the correct option out of the options given below :

(a) If both assertion and reason are true and the reason is the correct explanation of the assertion.

(b) If both assertion and reason are true but reason is not the correct explanation of the assertion.

(c) If assertion is true but reason is false.

(d) If the assertion and reason both are false.

(e) If assertion is false but reason is true.

Assertion: Acetic acid does not undergo haloform reaction.

Reason: Acetic acid has no alpha hydrogens.

Q. Which of the following compound(s) will give positive haloform test?

1. 2-Pentanone
2. Ethanol
3. 2-Hexanone
4. All of the above

Q. A compound A has molecular formula $C_{2}C{l}_{3}OH$. It reduces Fehling’s solution and on oxidation gives a monocarboxylic acid B. A is obtained by action of $C{l}_2$ on ethyl alcohol. A is:

1. chloral
2. $CHC{l}_3$
3. $C{H}_{3}Cl$
4. chloro acetic acid

Q. Which of the following ketone will not give yellow precipitate with $NaOH/I_2?$

1. 2-Pentanone
2. Benzophenone
3. Acetone
4. 2-Hexanone

Q.

$C{H}_{3}CHO$ and $C_6{H}_{5}C{H}_{2}CHO$ can be distinguished by:

1. Benedict's test

2. Iodoform test

3. Tollen's reagent test

4. Fehling's solution test

Q.
Final product (R) does not give:

1. Haloform reaction
2. Tautomerisation
3. Tollen's Test
4. 2, 4-DNP test

Q. After completion of the reactions (I and II), the organic compound(s) in the reaction mixtures is (are)

1. Reaction I: P and Reaction II: P
2. Reaction I: U, acetone and Reaction II: Q, acetone
3. Reaction I: T, U, acetone and Reaction II: P
4. Reaction I: R, acetone and Reaction II: S, acetone

Q.
Final product (R) does not give:

1. Haloform reaction
2. Tautomerisation
3. Tollen's Test
4. 2, 4-DNP test

Q. After completion of reaction I and reaction II, the organic compounds in the reaction mixture are:

1. 
2. 
3. 
4. 

Q.

Which reagent is used to convert butan-2-one into propanoic acid?

1. Fehling’s solution

2. Tollen’s reagent

3. NaOH, iodine; acidification

4. NaOH, NaI; acidification

Q.
Final product (R) does not give:

1. Haloform reaction
2. Tautomerisation
3. Tollen's Test
4. 2, 4-DNP test