Aldehydes Ketones and Carboxylic Acids Test

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Aldehydes Ketones and Carboxylic Acids Test - 24

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Weekly Quiz Competition

Question 1
1 / -0

Carbonyl group of aldehyde and ketone contain ________ groups.

A
carbon and oxygen

B
carbon and nitrogen

C
carbon and sulphur

D
none of these

Solution

Aldehyde and ketone formula are $$R-CHO$$, $$R-(C=O)-R$$
Thus, they contain carbon and oxygen in their groups.
Question 2
1 / -0

Which of the following IUPAC name will be used to name carboxylic acid functional group?

A
-one

B
-oic acid

C
-al

D
-ane

Solution

The following IUPAC name will be used to name carboxylic acid functional group is -oic acid.
Hence option B is correct.
Question 3
1 / -0

The carboxylic acid includes the functional group:

A
carboxyl and amine group

B
carboxyl and amide group

C
carboxyl and hydroxyl group

D
carboxyl and amine functional group

Solution

The carboxylic acid includes the functional group carboxyl and hydroxyl group
Hence option C is correct.
Question 4
1 / -0

Acetyl chloride cannot be obtained by treating acetic acid with:

A
$$CHCl_3$$

B
$$PCl_3$$

C
$$PCl_5$$

D
$$SOCl_2$$

Solution

$$CH_3COOH \xrightarrow {PCl_3} CH_3COCl +POCl +HCl$$

$$CH_3COOH \xrightarrow {PCl_5} CH_3COCl +HCl+POCl_3$$

$$CH_3COOH \xrightarrow {SOCl_2} CH_3COCl +SO_2 +HCl$$

With chloroform acetyl chloride cannot be formed with acetic acid.
Question 5
1 / -0

Which of the following compounds are not soluble in water?

A
Formaldehyde

B
Acetaldehyde

C
Acetone

D
None of the above

Solution

Formaldehyde, acetaldehyde and acetone all are water soluble. These are polar molecules and dissolve in polar solvent. Water is a polar solvent.
Question 6
1 / -0

IUPAC name of $$HOOCCH_2C(OH)(COOH)CH_2COOH$$ is

A
citric acid

B
2-Hydroxy-1,2,3-propanetri-carboxylicacid

C
2-Hydroxy-1,2,3-propanoic acid

D
hexanetrioic acid

Solution

Correct IUPAC name of given compound is 2-Hydroxy-1,2,3-propanetri-carboxylicacid. Citric acid is its common name.
Question 7
1 / -0

What is the IUPAC name of $$CH_3CH=CH-COOH$$?

A
2-Butenoic acid

B
Crotonic acid

C
2-Butanoic acid

D
3-Butenoic acid

Solution

$$\overset{4}{C}H_3 \overset{3}{C}H= \,^{2}CH- \,^{1}COOH$$
$$ But-2-ene-1-oic \, acid$$
Question 8
1 / -0

What is the common name of $$CH_2=CHCOOH$$?

A
Anthranilic acid

B
Citric acid

C
Acrylic acid

D
Propenoic acid

Solution

Common name of $$CH_2=CHCOOH$$ is acrylic acid.
Question 9
1 / -0

The compound $$X$$ on oxidation gives a mixture of acetic acid and formic acid, while $$Y$$ on oxidation forms only propionic acid. $$X$$ and $$Y$$ are :

A
$$X$$: $$CH_3-CH(OH)-CH_3$$, $$Y$$ : $$CH_3-CO-CH_3$$

B
$$X$$ : $$CH_3 - CH_2 - CH_2 - CHO$$, $$Y$$ : $$CH_3 - CO - CH_3$$

C
$$X$$ : $$CH_3 - CO - CH_3$$, $$Y$$ : $$CH_3 - CH_2 - CHO$$

D
$$X$$ : $$CH_3 - CO - CH_3$$, $$Y$$ : $$CH_3 - O - CH_2 - CH_3$$

Solution

The compound $$X$$ on oxidation gives a mixture of acetic acid and formic acid, while $$Y$$ on oxidation forms only propionic acid. $$X$$ and $$Y$$ are $$\displaystyle CH_3 - CO - CH_3$$ and $$\displaystyle CH_3 - CH_2 - CHO$$ respectively.

$$\displaystyle CH_3 - CO - CH_3 \xrightarrow {\text {oxidation}} CH_3-COOH + H-COOH$$
$$\displaystyle CH_3 - CH_2 - CHO \xrightarrow {\text {oxidation}} CH_3-CH_2-COOH $$

Option C is correct
Question 10
1 / -0

As the carbon chain increases in aldehyde and ketone compounds, solubility in water:

A
decreases

B
increases

C
may increase

D
may decrease

Solution

As the carbon chain increases in aldehyde and ketone compounds, solubility in water decreases.
Thus, aldehydes and ketones with few carbon atoms are water soluble whereas the one having several $$C$$ atoms are water insoluble. With increase in the number of $$C$$ atoms, the hydrophobic part of molecule increases. Hence, water solubility decreases.

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Re-Attempt Weekly Quiz Competition

Aldehydes Ketones and Carboxylic Acids Test - 24

Result

Aldehydes Ketones and Carboxylic Acids Test - 24

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SHARING IS CARING

Question 1

carbon and oxygen

carbon and nitrogen

carbon and sulphur

none of these

Solution

Question 2

-one

-oic acid

-al

-ane

Solution

Question 3

carboxyl and amine group

carboxyl and amide group

carboxyl and hydroxyl group

carboxyl and amine functional group

Solution

Question 4

$$CHCl_3$$

$$PCl_3$$

$$PCl_5$$

$$SOCl_2$$

Solution

Question 5

Formaldehyde

Acetaldehyde

Acetone

None of the above

Solution

Question 6

citric acid

2-Hydroxy-1,2,3-propanetri-carboxylicacid

2-Hydroxy-1,2,3-propanoic acid

hexanetrioic acid

Solution

Question 7

2-Butenoic acid

Crotonic acid

2-Butanoic acid

3-Butenoic acid

Solution

Question 8

Anthranilic acid

Citric acid

Acrylic acid

Propenoic acid

Solution

Question 9

$$X$$: $$CH_3-CH(OH)-CH_3$$, $$Y$$ : $$CH_3-CO-CH_3$$

$$X$$ : $$CH_3 - CH_2 - CH_2 - CHO$$, $$Y$$ : $$CH_3 - CO - CH_3$$

$$X$$ : $$CH_3 - CO - CH_3$$, $$Y$$ : $$CH_3 - CH_2 - CHO$$

$$X$$ : $$CH_3 - CO - CH_3$$, $$Y$$ : $$CH_3 - O - CH_2 - CH_3$$

Solution

Question 10

decreases

increases

may increase

may decrease

Solution

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