Aldehydes Ketones and Carboxylic Acids Test

Result

Aldehydes Ketones and Carboxylic Acids Test - 25

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Weekly Quiz Competition

Question 1
1 / -0

What is the structure of carbonyl group?

A
Tetrahedral

B
Trigonal planar

C
Pyramidal

D
Linear

Solution

The carbonyl carbon and the three atoms attached to it lie in the same plane and the $$\pi-$$ electron cloud is above and below this plane. The bond angles are approximately $$120^0$$ as expected of a trigonal planar structure.
Question 2
1 / -0

Formaldehyde is used as formalin in industries:

A
to preserve biological specimens

B
to prepare bakelite

C
both $$A$$ and $$B$$

D
none of these

Solution

Formaldehyde is used as Formalin in industries as to preserve biological specimens and to prepare bakelite
Question 3
1 / -0

IUPAC name of $$\begin{matrix} C{ H }_{ 3 }- & CH &-C{ H }_{ 2 }- CH -C{ H }_{ 3 } \\ & | & | & \\ & OH & COOH & \end{matrix}$$ is:

A
4-hydroxy-1-methylpentanoic acid

B
4-hydroxy-2-methylpentanoic acid

C
2-hydroxy-4-methylpentanoic acid

D
2-hydroxy-2-methylpentanoic acid

Solution

$$\begin{matrix} \overset{5}{C}{ H }_{ 3 }- & \overset{4}{C}H &-\overset{3}{C}{ H }_{ 2 }- \overset{2}{C}H -C{ H }_{ 3 } \\ & | & | & \\ & OH & \overset{1}{C}OOH & \end{matrix}$$

4-hydroxy-2-methylpentanoic acid
Question 4
1 / -0

In the sequence of the given reactions, the starting compound $$P$$ is:

A
o-nitro toluene

B
m-nitro toluene

C
o-bromo toluene

D
p-nitro toluene

Solution

Hence, the correct option is $$\text{D}$$
Question 5
1 / -0

$$CH_3-\overset{NH_2}{\overset{|}{C}H}-COOH$$

IUPAC name of the given compound is:

A
propanamine-oic acid

B
2-Aminopropanoic acid

C
amino propanoic acid

D
none of these

Solution

Parent functional group is $$-COOH$$ hence that carbon numbered as 1 and $$-NH_2$$ is substituent at 2nd carbon.

So, option B is correct.
Question 6
1 / -0

Which of the following aldehyde is mostly used as plasticizer?

A
Formaldehyde

B
Acetaldehyde

C
Butyraldehyde

D
Benzaldehyde

Solution

Butyraldehyde is used as an intermediate in the manufacturing of plasticizer.
Hence, option C is correct.
Question 7
1 / -0

Which is the commercially largest produced aldehyde?

A
Acetaldehyde

B
Formaldehyde

C
Benzaldehyde

D
Butyraldehyde

Solution

Of all aldehydes, formaldehyde is produced on the largest scale, about 6,000,000 tons per year.
Question 8
1 / -0

Which of the following is used as a food preservative?

A
Aldehydes

B
Ketones

C
Carboxylic acid

D
Alcohol

Solution

Carboxylic acid used as food preservatives.
Sodium Benzoate (salt of Benzoic acid) is used as food preservatives.
Question 9
1 / -0

IUPAC name of the compound is:

A
2-methylbenzoic acid

B
3-methyl benzenecarboxilic acid

C
2-methylbenzeneoic acid

D
3-methylbenzoic acid

Solution
Question 10
1 / -0

IUPAC name of compound is:

A
3,3-dimethylpropanoic acid

B
2-methylbutanoic acid

C
3-Methylbutanoic acid

D
none of these

Solution

Parent functional group is Carboxylic acid hence numbering start from -COOH carbon