Aldehydes Ketones and Carboxylic Acids Test

Result

Aldehydes Ketones and Carboxylic Acids Test - 72

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Weekly Quiz Competition

Question 1
1 / -0

Best starting material to synthesize 2-methylpentan-2-ol is

A

B
$${CH}_{3}{CH}_{2}{CH}_{2}CH_2CHO$$

C
$$CH_3COOH$$

D

Solution

The easiest method to prepare 2-methylpentan-2-ol can be prepared by hydrolysis of Ethyl magnesium bromide with Butan-4-one.

Hence, Option "D" is the correct answer.
Question 2
1 / -0

Nucleophilic addition reaction will be most favoured in:

A
$$ CH_3CH_2CHO $$

B
$$ CH_3CHO $$

C

D
$$ (CH_3)_2 C=O $$

Solution
Question 3
1 / -0

The synthesis of crotonaldehyde from acetaldehyde is an example of........... reaction.

A
nucleophilic addition

B
elimination

C
electrophilic addition

D
nucleophilic addition elimination.

Solution

Crotanaldehyde is produced by the aldol condensation of acetaldehyde
crotanaldehyde Aldehydes are carbonyl molecules that have a carbon attached to oxygen with a double bond, another group, and a hydrogen atom. ... Aldehydes and ketones undergo nucleophilic addition reactions due to the polarity in the carbonyl bond that makes them vulnerable to a nucleophile, an atom that donates electrons.
Question 4
1 / -0

In the reaction,

$${ C }_{ 2 }{ H }_{ 5 }OH\xrightarrow [ ]{ P{ I }_{ 3 } } (A)\xrightarrow [ ]{ KCN } (B)\xrightarrow [ ]{ Hydrolysis } (C)$$

The product (C) is:

A
acetic acid

B
formic acid

C
oxalic acid

D
propionic acid

Solution
Question 5
1 / -0

Which of the following statements is not correct?

A
Aldehydes and ketones contain polar carbonyl group

B
Aldehydes and ketones undergo nucleophilic addition

C
Aldehydes and ketones undergo electrophilic substitution

D
Lower members of aldehydes and ketones are soluble in water due to hydrogen bonding

Solution
Question 6
1 / -0

Which of the following compounds will give carboxylic acid with nitrous acid $$ (HNO_2)? $$

A
R-COCl

B
$$ R-CONH_2 $$

C
R-COOR

D
$$ (RCO)_2O $$

Solution

$$RCONH_2 + HNO_2 \rightarrow RCOOH$$
Hence option (B) is correct.
Question 7
1 / -0

Oil of vanilla bean is

A

B

C

D

Solution

Vanillin is an organic compound with the molecular formula $$C_8H_8O_3$$. It is a phenolic aldehyde. Its functional groups include aldehyde, hydroxyl, and ether. It is the primary component of the extract of the vanilla bean.

Option A is correct
Question 8
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Directions For Questions

A carbonyl compound $$P$$, which gives positive iodoform test, undergoes reaction with $$MeMgBr$$ followed by dehydration to give an olefin $$Q$$. Ozonolysis of $$Q$$ leads to a dicarbonyl compound $$R$$, which undergoes intramolecular aldol reaction to give predominantly $$S$$.
$$P \underset {\underset {3. H_{2}SO_{4}, \triangle}{2.H^{+}, H_{2}O}}{\xrightarrow {1. MeMgBr}} Q \underset {2. Zn, H_{2}O}{\xrightarrow {1. O_{3}}} R \underset {2.\triangle}{\xrightarrow {1. OH^{-}}} S$$.

...view full instructions

The structures of the products $$Q$$ and $$R$$, respectively, are

A

B

C

D

Solution
Question 9
1 / -0

Directions For Questions

A carbonyl compound $$P$$, which gives positive iodoform test, undergoes reaction with $$MeMgBr$$ followed by dehydration to give an olefin $$Q$$. Ozonolysis of $$Q$$ leads to a dicarbonyl compound $$R$$, which undergoes intramolecular aldol reaction to give predominantly $$S$$.
$$P \underset {\underset {3. H_{2}SO_{4}, \triangle}{2.H^{+}, H_{2}O}}{\xrightarrow {1. MeMgBr}} Q \underset {2. Zn, H_{2}O}{\xrightarrow {1. O_{3}}} R \underset {2.\triangle}{\xrightarrow {1. OH^{-}}} S$$.

...view full instructions

The structure of the carbonyl compound $$P$$ is

A

B

C

D

Solution
Question 10
1 / -0

Compound ' P ' of the following reaction sequence can be:

A

B

C

D

Solution