Aldehydes, Ketones and Carboxylic Acids Test

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Aldehydes, Ketones and Carboxylic Acids Test - 9

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Weekly Quiz Competition

Question 1
4 / -1

Which gives more than one amides on treatment with NH2OH followed by PCI₅?

A

B
H₂CO

C

D

Solution

Unsymmetrical carbonyls give more than one oximes with hydroxylamine, hence more than one amides in the subsequent Beckmann rearrangement.
Question 2
4 / -1

Which oximes on treatment with concentrated H₂SO₄ undergo rearrangement to give single amide?

A

B

C

D

Solution

Symmetrical oximes give single amide in Beckmann rearrangement.
Question 3
4 / -1

What would be the major organic product in the following oxidation reaction?

A

B

C

D

Solution

In BV oxidation, tertiary alkyl group has greater migrating aptitude than primary and secondary alkyl group.
Question 4
4 / -1

What is the final major product in the following reaction?

A

B

C

D

Solution
Question 5
4 / -1

What is the major organic product in the following reaction?

A

B

C

D

Solution
Question 6
4 / -1

What is X in the following reaction?

A

B

C

D

Solution
Question 7
4 / -1

What is X in the following reaction?

A
CH₃ — CH = CH₂

B
CH₃ — C ≡ CH

C

D

Solution
Question 8
4 / -1

A hydrocarbon (R) has six membered ring in which there is no unsaturation. Two alkyl groups are atttached to the ring adjacent to each other. One group has 3 carbon atoms with branching at 1st carbon atom of chain and another has 4 carbon atoms. The larger alkyl group has main chain of three carbon atoms of which second carbon is substituted. Correct IUPAC name of compound (R) is

A
1-(1-Methylethyl)-2-(1-methylpropyl)cyclohexane

B
1-(2-Methylethyl)-2-(1-methylpropyl)cyclohexane

C
1-(1-Methylethyl)-2-(2-methylpropyl)cyclohexane

D
1-(1-Methylethyl)-2-butylcyclohexane

Solution
Question 9
4 / -1

Which of the following could result as a product in the aldol condensation reaction?

A
4-methyl-3-penten-2-on

B
4-methyl-4-penten-2-one

C
4-methyl-5-hexen-2-one

D
3-methyl-4-hexen-2-one

Solution

It is an α, β-unsaturated ketone which can be formed in an aldol condensation followed by dehydration.
Question 10
4 / -1

Which of the following statements are correct in case of the carbonyl bond between carbon and oxygen?

A
Carbon is the nucleophilic centre and Oxygen is the electrophilic centre.

B
Oxygen is the nucleophilic centre and Carbon is the electrophilic centre.

C
Both 'b' and 'd' are correct

D
Carbon and Oxygen double bond is polarised.

Solution

In carbonyl bonds b/w O and C, C is electrophilic centre(centre which needs electron as it is deficient in it) and O is nucleophilic centre(centre which needs +ve charge as it has excess charge). Also, C=O bond is polarised with O having partial negative charge and C having partial positive charge.
Question 11
4 / -1

What is the common name of 2-methyl-propanal?

A
formaldehyde

B
Isobutyraldehyde

C
carbaldehyde

D
acetaldehyde
Solution
Isobutyraldehyde is the chemical compound with the formula (CH₃)₂CHCHO.

It is an aldehyde, isomeric with n-butyraldehyde.

Isobutyraldehyde is manufactured, often as a side-product, by the hydroformylation of propene. Its odour is described as that of wet cereal or straw.
Question 12
4 / -1

Comprehension Type
Direction (Q. Nos. 12-14) This section contains a paragraph, describing theory, experiments, data, etc.
Three questions related to the paragraph have been given. Each question has only one correct answer among the four given options (a), (b), (c) and (d).
Passage
Consider the following sequence of an organic synthesis

Q.
If the starting compound has all its stereoisomers present, how many different oximes would be produced?

A
2

B
3

C
4

D
6

Solution
Question 13
4 / -1

Consider the following sequence of an organic synthesis

Q.
Which is not a part of neutral products?

A

B

C

D
both (a) and (b)

Solution

(1) and (2) are the only rearrangement products.
Question 14
4 / -1

Consider the following sequence of an organic synthesis

Q.
What is the possible repeating unit of polymer formed at the end of the reaction ?

A

B

C

D
both (a) and (b)

Solution
Question 15
4 / -1

One Integer Value Correct Type

Direction (Q. Nos. 15-17) This section contains 3 questions. When worked out will result in an integer from 0 to 9 {both inclusive).

In the reaction

Q.

how many different amides are expected?

A
4

B
5

C
7

D
8

Solution

Both of pair below has one chiral carbon each, exist as a pair of enantiomers each.
Question 16
4 / -1

In the reaction

Q.

how many different amides are expected?

A
1

B
2

C
3

D
4

Solution
Question 17
4 / -1

Q.

How many lone pair of electrons are present in Y?

A
4

B
5

C
6

D
7

Solution