Aldehydes Ketones and Carboxylic Acids Test

Result

Aldehydes Ketones and Carboxylic Acids Test - 42

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Weekly Quiz Competition

Question 1
1 / -0

The relative acidity of the indicated $$H$$ in each of the following is :

A
$$i > ii > iii$$

B
$$ii > iii > i$$

C
$$i > iii > ii$$

D
$$iii > i > ii$$

Solution
Question 2
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What is $$I$$ and name of reaction?

A
Aniline, Hoffmann bromamide reaction

B
Sodium benzoate and Cannizaro reaction

C
Phenyl isocyanide and cannizaro

D
Phenyl isocyanide and carbylamine test

Solution
Question 3
1 / -0

Write IUPAC name of the following compound.

A
3-Hydroxy-2-methylpentanoic acid

B
4-Methyl-3-hydroxypentanoic acid

C
3-hydroxy-4-methylpentanoic acid

D
2-Methyl-2-hydroxypentanoic acid

Solution

3-Hydroxy-4-methylpentanoic acid
Question 4
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The IUPAC name for
$$CH_{ 3 }-{ \overset { \overset { O }{ \parallel } }{ C } -CH }_{ 2 }-C{ H }_{ 2 }-\overset { \overset { O }{ \parallel } }{ C } -OH$$

A
1-hydroxypentane-1,4-dione

B
1,4-dioxopentanol

C
1-Carboxybutan-3-one

D
4-Oxopentanoic acid

Solution
Question 5
1 / -0

The correct product of the following reaction is:

A

B

C

D

Solution

Solution:- (A)
$${C}_{6}{H}_{5}-{C}_{2}{H}_{5} \xrightarrow[{{H}_{3}O}^{+}]{\text{Alkaline } KMn{O}_{4}} \underset{\left( \text{Benzoic acid} \right)}{{C}_{6}{H}_{5}-COOH}$$
Question 6
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Compound X produces a carboxylic acid when heated under reflux with acidified potassium dichromate(VI). Compound X does not react with sodium metal.
What could be the identity of compound X?

A
Propanal

B
Propanone

C
Propan-$$1$$-ol

D
Propan-$$2$$-ol

Solution

$$\text{Ptopanal which is aldehyde gives carboxylic acid when heated under reflux with acidified potassium dichromate(VI)}$$
$$\text{It is a oxidation reaction.}$$
$$\text{Propanal does not react with Na metal.}$$
Question 7
1 / -0

Find the end product of reaction.

A

B

C

D

Solution

Solution:- (D)
The end product of the reaction is $$1,2$$-dihydronaphthalen-$$2$$-one.
Question 8
1 / -0

Alcohols, aldehydes and nitriles can each be converted into carboxylic acids. Which descriptions of their conversions into carboxylic acids are correct?

alcohols aldehydes nitriles
A hydrolysis hydrolysis hydrolysis
B hydrolysis hydrolysis oxidation
C oxidation oxidation hydrolysis
D oxidation oxidation oxidation

A
A

B
B

C
C

D
D

Solution

$$\text{1.Oxidation of alcohols converted into carboxylic acid.}$$
$$\text{2.Oxidation of aldehydes converted into carboxylic acid.}$$
$$\text{3.Nitriles can be converted into carboxylic acid by hydrolysis..}$$
Question 9
1 / -0

Which product is formed when $$3$$-methylpentane-$$1, 3, 4$$-triol is heated under reflux with an excess of acidified potassium dichromate(VI)?

A
$$HO_2CCH_2C(CH_3)(OH)COCH_3$$

B
$$HO_2CCH_2COC(OH)(CH_3)_2$$

C
$$OHCCH_2C(CH_3)(OH)COCH_3$$

D
$$HO_2CCH_2CO(CH_3)COCH_3$$

Solution

Solution:- (A) $$HOOC-C{H}_{2}-\underset{\overset{|}{OH}}{\overset{\underset{|}{C{H}_{3}}}{C}}-\overset{\underset{||}{O}}{C}-C{H}_{3}$$
$${H}_{3}C-\overset{\underset{|}{OH}}{C{H}_{2}}-\underset{\overset{|}{OH}}{\overset{\underset{|}{C{H}_{3}}}{C{H}_{2}}}-C{H}_{2}-C{H}_{3}-OH \xrightarrow{{K}_{2}{Cr}_{2}{O}_{7} \left( \text{acidified} \right)} HOOC-C{H}_{2}-\underset{\overset{|}{OH}}{\overset{\underset{|}{C{H}_{3}}}{C}}-\overset{\underset{||}{O}}{C}-C{H}_{3}$$
The acidified potassium dichromate $$\left( VI \right)$$ will oxidise $$-OH$$ group attached primary carbon to carboxylic group and secondary carbon to ketone.
Question 10
1 / -0

What is sequence of reagent use to convert following?

A
$$H_{2}/ Pd, [Ag(NH_{3})_{2}]^{+}, Br_{2}/ NaOH$$

B
$$Ag[(NH_{3})_{2}]^{+}, H_{2}/Pd, Br_{2}/NaOH$$

C
$$Br_{2}/NaOH, [Ag(NH_{3})_{2}]^{+}, H_{2}/ Pd$$

D
$$H_{2}/Pd, Br_{2}/NaOH, [Ag(NH_{3})_{2}]^{+}$$

Solution

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