Aldehydes Ketones and Carboxylic Acids Test

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Aldehydes Ketones and Carboxylic Acids Test - 19

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following names are incorrect?

A
2-chloropentanoic acid

B
2-methylhex-3-enoic acid

C
$$\displaystyle CH_{3}CH_{2}CH=CHCOCH_{3}$$ ; hex-3-en-2-one

D
1-methylpentanal

Solution

1-methylpentanal is not possible but 2-methylpentanal is
Question 2
1 / -0

What is the IUPAC name for the following compound?

A
3-methylpentanoic acid

B
isohexanoic acid

C
$$\beta$$-methylvaleric acid

D
2-methylpentanoic acid

Solution

The IUPAC name of the given compound is 3-methylpentanoic acid.
The parent compound is a carboxylic acid with five carbon atoms.
It is known as pentanoic acid.
A methyl group is present as a substituent at a third carbon atom.
Question 3
1 / -0

IUPAC name of $$CH_3CH(CH_3)COOH$$ is :

A
butyric acid

B
propionic acid

C
2-methylpropanoic acid

D
dimethylacetic acid

Solution

As it contains 4 carbon and functional group is carboxylic acid so its name is 2-methyl propanoic acid.
Question 4
1 / -0

$$\displaystyle PhCHO\xrightarrow{SF_{4}}B$$
This reaction is complete at $$160^o C$$ so product B will be ?

A
$$\displaystyle PhCHF_{3}$$

B
$$\displaystyle PhCHF_{4}$$

C
$$\displaystyle PhCHF_{2}$$

D
none

Solution
Question 5
1 / -0

Which of the following is most reactive in a hydrolysis reaction to make butanoic acid?

A
Butanoic anhydride

B
Methyl butanoate

C
N-methylbutanamide

D
Butanenitrile

Solution

Due to the higher level of unsaturation, nitriles are highly reactive to hydrolysis reaction and forms acid as shown above :
Hence, the correct option is D.
Question 6
1 / -0

Which of the following is the functional group for carboxylic acids?

A

B

C

D

Solution
Question 7
1 / -0

Consider the following reaction:
The m-isomer of D and E is called :

A
Phthalic acid

B
Isophthalic acid

C
Terephthalic acid

D
None

Solution

Alkyl group containing Benzene generally get oxidized on treatment with $$KMnO_4$$ solution. The reaction only works if there is a hydrogen attached to the benzylic carbon. The position directly adjacent to an aromatic group is called the benzylic position. If we treat m-methyl toluene and p-methyl toluene with $$KMnO_4$$ we will get dicarboxy acid. m-isomer of the two compounds will be Isophthalic acid.
Question 8
1 / -0

An organic compound $$A(C_8H_6O_2)$$ on treatment with $$NaOH(aq)$$ followed by acidifying the products gives $$B(C_8H_8O_3)$$. B on oxidation gives benzoic acid as the important organic product. What is $$A$$?

A
$$C_6H_5COCHO$$

B
$$C_6H_5CH(OH)-COOH$$

C

D

Solution
Question 9
1 / -0

Identify the compound A among the following compounds.

A
o-terephthalic acid

B
o-terephthalaldehyde

C
Salicylic acid

D
None of these

Solution

$$Cr_2O_7^{2-} / H^+$$ is an oxidizing agent which oxidizes the compound and oxidative cleavage takes place to form o-terephthalic acid and acetic acid.
Question 10
1 / -0

Consider the following reaction:
The compound $$D$$ is an ortho-isomer and E is a $$p-isomer$$. The compounds $$D$$ and $$E$$, respectively are :

A
Phthalic acid and isophthalic acids

B
Isophthalic and phthalic acids

C
Terephthalic and phthalic acids

D
Phthalic and terephthalic acids

Solution

The compound D is a $$o-isomer$$ and E is a $$p-isomer$$. The compounds D and E, respectively are Phthalic and terephthalic acids.