Aldehydes Ketones and Carboxylic Acids Test

Result

Aldehydes Ketones and Carboxylic Acids Test - 45

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Weekly Quiz Competition

Question 1
1 / -0

By aerial oxidation, which one of the following gives phthalic acid

A
Naphthalene

B
Banzene

C
Mesitylene

D
Toluene

Solution
Question 2
1 / -0

Reaction of primary amines with aldehyde yields

A
amides

B
aldimines

C
nitriles

D
nitro compounds

Solution

primary amine + aldyhyde it gives aidimines
Question 3
1 / -0

Carbonyl compounds are usually

A
Ethers , aldehydes , ketones and carboxylic acids

B
Aldehydes , ketones and carboxylic acids

C
Aldehydes and ketones

D
Carboxylic acids

Solution

carbonyl compound are the compound which have $$-CO-$$ group. and they are usually Aldehydes and Ketones.
Question 4
1 / -0

Oleic, stearic and palmitic acids are

A
Fatty acid

B
Amino acid

C
Nucleic acid

D
Essential acid

Solution

Oleic acid, stearic acid and palmitic acids are produced by the hydrolysis of fats and the acid produced by hydrolysis of fats are called fatty acid.
Question 5
1 / -0

When toluene is treated with $$KMnO_{4}$$, what is produced ?

A
Benzene

B
Chlorobenzene

C
Benzaldehyde

D
Benzoic acid

Solution
Question 6
1 / -0

The rose odour from an ester is formed by the action of $$HCOOH$$ on

A
Pine oil

B
Olive oil

C
Geraniol

D
Turpentine oil

Solution

$$C_{10}H_{17}OH$$ (Geraniol) a liquid terpene alcohol forms ester of rose odour with $$HCOOH.$$
Question 7
1 / -0

$$2 , 4 - \text{dichloro phenoxyacetic}$$ acid is used as a

A
Fungicide

B
Insecticide

C
Herbicide

D
Moth repellent

Solution

It is herbicide (kill herbs)
Question 8
1 / -0

The order of susceptibility of nucleophilic attack on aldehydes follows the order

A
$$ 1^{\circ} > 3^{\circ} > 2^{\circ} $$

B
$$ 1^{\circ} > 2^{\circ} > 3^{\circ} $$

C
$$ 3^{\circ} > 2^{\circ} > 1^{\circ} $$

D
$$ 2^{\circ} > 3^{\circ} > 1^{\circ} $$

Solution

$$\text{As the alkyl group increases, carbonyl becomes a weak electrophile and the reactivity becomes low. So, the order is}$$ $$ 1^{\circ} > 2^{\circ} > 3^{\circ} $$
Question 9
1 / -0

Among the following acids which has the lowest $$pKa$$ value

A
$$CH_3COOH$$

B
$$HCOOH$$

C
$$(CH_3)_2CH-COOH$$

D
$$CH_3CH_2COOH$$

Solution

$$K_a\propto\frac{1}{pK_a}; $$The value of $$K_a$$ is highest for HCOOH .
Question 10
1 / -0

Compounds $$(A)$$ and $$(B)$$ are:

A

B

C

D

Solution