CBSE Questions for Class 12 Medical Chemistry Aldehydes, Ketones And Carboxylic Acids Quiz 2 - MCQExams.com

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  • oxidation, chlorination
  • reduction, chlorination
  • oxidation, addition
  • reduction, substtution
General formula of saturated monocarboxylic acid is :
  • $$C_{n}H_{2n+1} COOH$$
  • $$C_{n}H_{2n}O_{2}$$
  • Both A and B
  • None of the above
Methyl cyanide on hydrolysis gives :
  • acetic acid.
  • acetaldehyde.
  • acetone.
  • methyl amine.
$$CH_{3}CH_{2}OH+O_{2}\xrightarrow[]{X}$$ Vinegar
In the above reaction, $$X$$ is:
  • $$(CH_{3}COO)_{2}Mn$$
  • $$CH_{3}COOH$$
  • mycoderma aceti
  • $$K_{2}Cr_{2}O_{7}/H^{\bigoplus}$$
A compound of general formula $$C_{n}H_{2n}O_{2}$$ could be :
  • an acid
  • a diketone
  • an ether
  • an aldehyde
$$CH_{3}Cl  \xrightarrow[]{KCN} A \xrightarrow[]{H_{3}O^+} B$$

In this reaction, the product B is  :
  • $$CH_{3}COOC_{2}H_{5}$$
  • $$CH_{3}COOH$$
  • $$HCOOH$$
  • $$CH_{3}CONH_{2}$$
Toluene$$\xrightarrow[]{KMnO_{4}/KOH/H_{3}O^{\bigoplus }}$$ A. 

What is A?
  • Acetice acid
  • Benzene
  • Benzoic acid
  • Benzaldehyde
Assertion (A) : The solubility of aldehydes and ketones in water decreases with increase of size of the alkyl group
Reason (R) Alkyl groups are electron releasing groups
  • Both A and R ae true and R is the correct

    explanation of A
  • Both A and R are true and R is not the

    correct explanation of A
  • A is true but R is false
  • A is false but R is true.
Which of the following is not a monovalent group?
  • Aldehydic
  • Ketonic
  • Carboxylic
  • Hydroxy
Oxidation product of X with molecular formula $$C_{2}H_{4}O$$ is Y with molecular formula $$C_{2}H_{4}O_{2}$$.The compound Y is :
  • acetic acid
  • formic acid
  • propionic acid
  • buteric acid
In the manufacture of acetic acid from aerial oxidation of acetaldehyde, the catalyst used is :
  • acidified $$K_{2}Cr_{2}O_{7}$$
  • $$(CH_{3}COO)_{2}Mn$$
  • $$HgSO_{4}$$
  • $$Ni$$
Isobutyraldehyde on oxidation gives:
  • 2-Methylpropanoic acid
  • 2-Methylpropanone
  • Propanoic acid
  • 2-Methyl butanoic acid
Which of the following compounds does not have a carboxyl group?
  • Methanoic acid
  • Ethanoic acid
  • Picric acid
  • Benzoic acid
Assertion (A) : $$CH_{3}CN$$ on hydrolysis gives Acetic Acid
Reason (R) : Cyanides on hydrolysis liberates $$NH_{3}$$ gas
  • Both A and R ae true and R is the correct explanation of A
  • Both A and R are true and R is not

    the correct explanation of A
  • A is true but R is false
  • A is false but R is true.
When acetonitrile is hydrolysed the product formed is ________.
  • $$CH_{3}COOH$$
  • $$C_{2}H_{5}COOH$$
  • $$CH_{3}CONH_{2}$$
  • $$C_{2}H_{2}NH_{2}$$
An aldehyde on oxidation gives
  • a carboxylic acid
  • an alcohol
  • an ether
  • a ketone
In aldehydes and ketones, carbonyl carbon shows _______ hybridisation.
  • $$sp$$
  • $${ sp }^{ 3 }$$
  • $${ sp }^{ 2 }$$
  • $${ sp }^{ 3 }d$$
$$X$$ is:
30808_d5eca23a68c242ad9e4a7887af1f197e.png
Consider the reaction:
$$RCHO + NH_{2}NH_{2} \rightarrow RCH = N NH_{2}$$
What sort of reaction is it?
  • Free radical addition elimination reaction
  • Electrophilic substitution-elimination reaction
  • Nucleophilic addition elimination reaction
  • Electrophilic addition elimination reaction
The correct structural formula of butanoic acid is
  • $$H-\overset{H}{\overset{|}{\underset{H}{\underset{|}{C}}}}-\overset{H}{\overset{|}{C}}=\overset{H}{\overset{|}{C}}-\overset{O}{\overset{||}{C}}-OH$$
  • $$H-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{O}{\overset{||}{C}}}}-OH$$
  • $$H-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-OH$$
  • $$H-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\underset{H}{\underset{|}{\overset{H}{\overset{|}{C}}}}-\overset{O}{\overset{||}{C}}-OH$$
$$CH_{3}CH_{2}CH_{2}CHO\overset{x}{\rightarrow}CH_{3}CH_{2}CH_{2}COOH$$
In the above reaction X is an oxidising agent and X is__________.
  • Tollens reagent
  • Fehlings reagent
  • $$H NO_{3}$$
  • All the above
The functional group present in carboxylic acids is ?
  • -COOH
  • -CO-
  • -OH
  • -CHO
The acid in which $$-COOH$$ group is (are) present ?
  • ethanoic acid
  • picnic acid
  • lactic acid
  • palmitic acid
On vigorous oxidation by permanganate solution $$(CH_{3})_{2}C=CH-CH_{2}CHO$$ gives :
  • $$(CH_{3})_{2}CO$$ and $$OHC-CH_{2}-CHO$$
  • $$(CH_3)_3COH$$ and $$HCHO$$
  • $$(CH_{3})_{2}CO$$ and $$OHC-CH_{2}-COOH$$
  • $$(CH_{3})_{2}CO$$ and $$CH_{2}(COOH)_{2}$$
The IUPAC name for the compound $$CH_3-C(CH_3)=CH-COOH$$ is:
  • 2-Methyl-2-butenoic acid
  • 3-Methyl-3-butenoic acid
  • 3-Methyl-2-butenoic acid
  • 2-Methyl-3-butenoic acid
What is the common name of propanone?
  • Oxobutane
  • Acetone
  • Ethyl acetone
  • Ethyl methyl ketone
The general formula of carboxylic acids is:
  • $$C_{n}H_{n}COOH$$
  • $$C_{n}H_{2n}COOH$$
  • $$C_{n}H_{2n-2}COOH$$
  • $$C_{n}H_{2n+1}COOH$$
IUPAC name of the compound $$CH_3-CH_2-\overset{\overset{O}{||}}C-CH_2-\overset{\overset{O}{||}}C-COOH$$ is:
  • hexanedione - 2, 4-ic-1-oic acid
  • 2, 4- dioxohexanoic acid
  • propionyl-dioxo-oic acid
  • none of these
The secondary suffix, '-one' indicates the following functional group in the compound.
  • -COOH
  • - OH
                                                     $$O$$
                                                     $$||$$
$$X\xrightarrow[(ii)\,H_3O^{\oplus}]{(i)\, KMnO_4/H_2O/\Delta}HOOC - C-CH_2-CH_2-CH_2-CH_2-COOH$$.
$$X$$ is :
IUPAC name of $$CH_3COOH$$ is:
  • acetic acid
  • formic acid
  • methanoic acid
  • ethanoic acid
The IUPAC name of carboxylic acid with three carbon atoms is:
  • ethanoic acid
  • acetic acid
  • propanoic acid
  • propionic acid

What is the IUPAC name for the following compound?
117936.jpg
  • 3-methylpentanoic acid
  • isohexanoic acid
  • $$\beta$$-methylvaleric acid
  • 2-methylpentanoic acid
The IUPAC name of above structure is :
117924.png
  • phenyl ethanone
  • methyl phenyl ketone
  • acetophenone
  • phenyl methyl ketone
In addition reactions of aldehydes, the carbonyl carbon atom changes from:
  • $$sp^{3}\ to\ sp^{2}$$
  • $$sp^{2}\ to\ sp^{3}$$
  • $$sp\ to\ sp^{3}$$
  • $$sp^{3}\ to\ sp$$
The name of the compound is cyclohexylidene methanone.

128738.jpg
  • True
  • False
$$\displaystyle CH_{3}CHO \xrightarrow[( ii )HCl\Delta ]{( i )Zn / Hg}$$
Write the product :
  • Methane 
  • Ethane 
  • Propane
  • Butane
The name of the compound is Cyclopropanecarboxylic acid.
128689.png
  • True
  • False
Cyanohydrin of which compound on hydrolysis will give lactic acid?
  • $$\displaystyle C_{6}H_{5}CHO$$
  • $$HCHO$$
  • $$\displaystyle CH_{3}CHO$$
  • $$\displaystyle CH_{3}CH_{2}CHO$$
Which of the following names are incorrect?
  • 2-chloropentanoic acid
  • 2-methylhex-3-enoic acid
  • $$\displaystyle CH_{3}CH_{2}CH=CHCOCH_{3}$$ ; hex-3-en-2-one
  • 1-methylpentanal
The IUPAC name of $$CH_{3}COCH(CH_{3})_{2}$$ is:
  • 4-methylisopropyl ketone
  • 3-Methyl-2-butanone
  • Isopropylmethyl ketone
  • 2-methyl-3-butanone
IUPAC name of $$CH_3CH(CH_3)COOH$$ is :
  • butyric acid
  • propionic acid
  • 2-methylpropanoic acid
  • dimethylacetic acid
$$\displaystyle PhCHO\xrightarrow{SF_{4}}B$$
This reaction is complete at $$160^o C$$  so product B will be ?
  • $$\displaystyle PhCHF_{3}$$
  • $$\displaystyle PhCHF_{4}$$
  • $$\displaystyle PhCHF_{2}$$
  • none
Which of the following is most reactive in a hydrolysis reaction to make butanoic acid?
  • Butanoic anhydride
  • Methyl butanoate
  • N-methylbutanamide
  • Butanenitrile
The correct statement regarding hydrolysis of a nitrile to a carboxylic acid is (are) :
$$RCN + H_2O \longrightarrow RCOOH$$
  • the reaction passes through an amide intermediate
  • both acid and base catalyzes the hydrolysis reaction.
  • intermediate product is impractical to separate
  • the reaction does not work for the preparation of an aromatic acid.
What is /are true regarding the following reaction?

$$CH_3CH_2CHO \overset{HCN}{\longrightarrow} \quad \xrightarrow{Dil\, H_2SO_4} Acid$$
  • The product is an $$\alpha$$-hydroxy acid with one carbon greater than the starting aldehyde.
  • The product is racemic mixture of $$\alpha$$-hydroxy acid.
  • Adding a small amount of NaCN in the first step catalyzes the reaction.
  • The first step can also be affected using base as catalyst followed by acidification of product
Out of the following the one that undergoes reaction with 50% NaOH solution to give corresponding alcohol and acid is:
  • phenol
  • benzaldehyde
  • butanol
  • benzoic acid
Consider the following reaction:
The m-isomer of D and E is called :

245838.png
  • Phthalic acid
  • Isophthalic acid
  • Terephthalic acid
  • None
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 $$A$$?
  •  $$C_6H_5COCHO$$
  • $$C_6H_5CH(OH)-COOH$$
Identify the compound A among the following compounds.
244191.jpg
  • o-terephthalic acid
  • o-terephthalaldehyde
  • Salicylic acid
  • None of these
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