CBSE Questions for Class 12 Medical Chemistry Aldehydes, Ketones And Carboxylic Acids Quiz 11 - MCQExams.com

$$R-C{ H }_{ 2 }-C{ H }_{ 2 }OH$$ can be converted to $$R-C{ H }_{ 2 }C{ H }_{ 2 }COOH$$. The correct sequence of reagents is:
  • $$P{ Br }_{ 3 },KCN,{ H }_{ 3 }{ O }^{ + }$$
  • $$P{ Br }_{ 3 },KCN,{ H }_{ 2 }$$
  • $$KCN,{ H }^{ + }$$
  • $$HCN,P{ Br }_{ 3 },{ H }^{ + }$$
Oxidation of cyclohexene in presence of acidic potassium permanganate leads to.
  • Glutaric acid
  • Adipic acid
  • Pimelic acid
  • Succinic acid
Which of the following compound upon oxidation gives isophthalic acid?
  • p-Xylene
  • m-Xylene
  • o-Xylene
  • m-Cresol
Trichloroacetaldehyde, $$ CC{ l }_{ 3 }CHO$$ reacts with chlorobenzene in presence of sulphuric acid and produces:
Which of the following is not a final product obtained by cross aldol condensation of ethanal and propanal?
  • 3-Methyl-but-2-enal
  • 2-Methyl-pent-2-enal
  • But-2-enal
  • Pent-2-enal
Which is the main functional group in Acrolein?
  • Aldehyde
  • Alkene
  • Nitrile
  • Ester
In the given reaction sequence :
874674_72dd80759179427cb0fae2b660a546ee.png
Among the following sets of reactants, which one produces anisole?
  • $$CH_{3}CHO; RMgX$$
  • $$C_{6}H_{5}OH; NaOH; CH_{3}I$$
  • $$C_{6}H_{5}OH; neutral\ FeCl_{5}$$
  • $$C_{6}H_{5} - CH_{3}; CH_{3}COCl; AlCl_{3}$$
Identify the structure of $$M$$ in the following sequence of reactions.
876713_ebc1943bf87c4161b1c985aef5948083.png
What is the formula of Acrolein?
  • $${ CH }_{ 2 }=CH-CHO$$
  • $${ CH }_{ 2 }=CH-CN$$
  • $${ CH }_{ 2 }=CN-COOH\quad $$
  • $${ CH }_{ 2 }=CH-CO{ NH }_{ 2 }$$
Which will undergo Friedel-Crafts alkylation reaction?
Which of the following reaction end with the same product?
876873_e36d55b19d704f67a54ca455cfd4170b.JPG
  • a, b, c
  • a, c
  • b, c
  • a, b
Which is the correct method of synthesising acetamide from acetone?
  • $$CH_3COCH_3\xrightarrow{Pd/BaSO_4}CH_3CHO\xrightarrow{NH_3}CH_3CH_2NH_2\xrightarrow{H_2O}CH_3CONH_2$$
  • $$CH_3COCH_3\xrightarrow[NaOH]{I_2}CH_3COONa\xrightarrow[NH_3]{H^+}CH_3COONH_4\xrightarrow{\Delta}CH_3CONH_2$$
  • $$CH_3COCH_3\xrightarrow{CrO_3}CH_3COOH\xrightarrow{NH_3}CH_3CONH_2$$
  • $$CH_3COCH_3\xrightarrow [NaOH]{I_2}CH_3COOH\xrightarrow {HCl}CH_3COCl\xrightarrow {NH_3}CH_3CONH_2$$
The final product $$(Y)$$ in the following sequence of chemical reaction is:
$$CH_3OH\xrightarrow[300^oC]{Cu} X \xrightarrow{NaOH} Y + CH_3OH$$
  • an alkene
  • a carboxylic acid
  • an aldehyde
  • sodium salt of carboxylic acid
The addition of $$HCN$$ to carbonyl compounds is an example of:
  • nucleophilic addition
  • electrophilic addition
  • free radical addition
  • electromeric addition
Acetic acid is obtained when:
  • methyl alcohol is oxidised with potassium permanganate
  • calcium acetate is distilled in the presence of calcium formate
  • acetaldehyde is oxidised with potassium dichromate and sulphuric acid
  • glycerol is heated with sulphuric acid
$$CH_3-CH=CH-CHO  \xrightarrow[\Delta]{OH^{\circleddash}/H_2O}$$
The major product which can be isolated from this reaction is:
  • $$CH_3COOH$$
  • $$CH_3CHO$$
  • $$CH_3CH_2OH$$
Which of the following would be the best synthesis of $$2, 2-dimethyl$$ propanoic acid?
When a nucleophile encounters a ketone, the site of attack is:
  • the carbon atom of the carbonyl
  • the oxygen atom of the carbonyl
  • both the carbon and oxygen atoms, with equal probability
  • no attack occurs as ketones do not react with nucleophiles
$$Ph_2CH-\overset{O}{\overset{||}{C}}-H\overset{aqueous acid}{\rightarrow}\underset{81\%}{(A)}+\underset{2\%}{enol}+\underset{17\%}{aldehyde}$$
Product (A) of given reaction will be.
  • $$Ph-\underset{Ph}{\underset{|}{C}}=CH-O$$
  • $$Ph_2CH-\overset{OH}{\overset{|}{C}}H_2$$
  • $$Ph_2CH-\overset{OH}{\overset{|}{C}}H-OH$$
  • $$Ph_2CH-\overset{O}{\overset{||}{C}}-CH_3$$
Identify $$(X),\ (Y)$$ and $$(Z)$$ in the given reaction.
$$CH_3CHO \xrightarrow[H_2SO_4]{K_2Cr_2O_7}(X) \xrightarrow{PCl_5}(Y) \xrightarrow[anh.AlCl_3]{C_6H_6}(Z)$$ :
  • $$(X) = HCOOH,\,\,\, (Y) = COCl_2, \,\,\, (Z) = C_6H_5Cl$$
  • $$(X) = CH_3COOH,\,\,\, (Y) = CH_3COCl, \,\,\, (Z) = C_6H_5COCH_3$$
  • $$(X) = CH_3COOH,\,\,\, (Y) = CH_3CH_2CH_2Cl, \,\,\, (Z) = C_6H_5CH_2CH_2CH_3$$
  • $$(X) = CH_3COCH_3,\,\,\, (Y) = CH_3CH(Cl)CH_3, \,\,\, (Z) = C_6H_5COCH_3$$
Which of the following compounds are not oxidized by $$HIO_{4}$$?
992778_0feec9175fab49f2b00bf01d54a478e5.png
  • $$5, 6, 7$$
  • $$4, 5, 6, 7$$
  • $$6, 7$$
  • $$3, 4, 5, 6, 7$$
Which of the following compounds is most reactive towards nucleophilic addition reactions?
  • $$CH_3-{\overset{O}{\overset{||}{C}}}-CH_3$$
  • $$CH_3-{\overset{O}{\overset{||}{C}}}-H$$
The reaction of $$C_6H_5CH=CHCHO$$ with $$LiAlH_4$$ gives.
  • $$C_6H_5CH_2CH_2CH_2OH$$
  • $$C_6H_5CH=CHCH_2OH$$
  • $$C_6H_5CH_2CH_2CHO$$
  • $$C_6H_5CH_2CHOHCH_3$$
Compound(x) in the given reaction is:
991951_d99c9af2734248f8bdaaf5066c4cb2a1.png
  • $$Ph-\overset{O}{\overset{||}{C}}-CH_3$$
  • $$Ph-\overset{O}{\overset{||}{C}}-H$$
  • $$Ph-CH_2-\overset{O}{\overset{||}{C}}-H$$
  • $$Ph-CH_2-\overset{O}{\overset{||}{C}}-CH_3$$
Given the major organic product of the following reaction.
993118_aa49546cca0a4793aa118ef631373f39.png
Complete the reactions with appropriate products.
(i) $$CH_3CHO+NH_2OH \rightarrow X$$
(ii) $$CH_2=CH_2+PdCl_2+H_2O \xrightarrow{CuCl_2}Y $$
(iii) $$CH_3CH_2CH_2CH_2OH \xrightarrow{CrO_3-H_2SO_4}Z $$
  • $$X = CH_3CH=NOH, \,\, Y = CH_3CHO, \,\, Z = CH_3CH_2CH_2COOH$$
  • $$X = CH_3CH_2NH_2, \,\, Y= CH_3CH_2CHO, \,\, Z = CH_3CH_2CH_2COOH$$
  • $$X = CH_3CONH_2, \,\, Y= HCHO, \,\, Z= CH_3COCH_3$$
  • $$X = CH_3C\equiv N, \,\, Y = CH_3CHO,\,\, Z = HCOOH$$
Consider the following sequence of reactions. The final product (B) is?
995600_e4069b8d175c4726a01a983d08ab88cc.png

The product of acid hydrolysis of [P] and [Q] can be distinguished by:
1103454_f39cf3018f324f9daaefaac62eb4d194.png
  • Lucas reagent
  • 2,4-DNP
  • Fehling's solution
  • $$NaHSO_{3}$$
Product (x) in this reaction is: 
1055373_b50bb660e4c74503971eafb7530c2aa7.png
Above compound is hydrated maximum at which position?
996185_acc283282d7e4601bf2d3aa981690ed6.png
  • $$1$$
  • $$2$$
  • $$3$$
  • equal
Which of the following carboxylic acids undergoes decarboxylation most easily on heating?
  • $$CH_3CH_2COOH$$
Product $$(D)$$ in above reaction is:
993120_c1529ed34f1b4b798e9f1204b0fd2969.png
Which of the following has lowest $$pK_a$$ value?
The compound $$(C)$$ is:
1068135_e886fd3ae1a44cc58e305de6ca0de775.png
The IUPAC name of the compound is:
1087930_573c7a3e8ba943fd9b2f3f4aa2e55de8.png
  • $$2-ethyl-3-methylcyclohexa-1, 3-diene$$
  • $$2, 5-dimethylhepta-2, 6-dienoic$$ acid
  • $$3-bromo-2-methylbutanoic$$ acid
  • $$3-bromo-2, 3 dimethylbutanoic$$ acid
The major product in the reaction of $$\alpha$$-bromo cyclohexanone with potassium ethoxide is?
Arrange the following compounds in decreasing order of reactivity towards nucleophilic addition reaction:

I) $${ C }_{ 6 }{ H }_{ 5 }COC{ H }_{ 3 }$$
II) $$C{ H }_{ 3 }-COC{ H }_{ 3 }$$
III) $$C{ H }_{ 3 }-CHO$$
  • I > II > III
  • III > II > I
  • II > I > III
  • III > I > II

Choose the compound D from the following.
1133105_1a3e845295264c3b81b5921ed8b90444.PNG
In the reaction CH$$_{3}$$OH $$\rightarrow$$ HCOOH, the number of electrons that must be addad to the right is :
  • 4
  • 3
  • 2
  • 1
Which of the following is correct?
  • Aldehydes undergo Cannizzaro's reaction
  • Aldehydes are less susceptible to oxidation than ketones
  • Aldehydes are more susceptible to oxidation than ketones
  • Formaldehyde forms $$CuO$$ with Fehling's solution
$$\underrightarrow { NaOH\left( aq \right)  }$$
1150607_992968f5db5a4d8ba5ff0443cb4d531f.png
Identify the products(s) obtained in the following reaction
1151925_76f7c13eb81a405ca078ef2235927343.PNG
  • $$CH_3COOH$$
  • $$CH_3CH_2CH_2COOH$$
  • $$CH_3CH_2COOH$$
  • All of these
Possible product of the following reaction is:

$$CH_3CHO + CH_3 CH_2 CHO \xrightarrow[(ii)\Delta]{(i)NaOH}$$
  • $$CH_3CH_2CH_2OH$$
  • $$CH_3CH = \overset{CH_3}{\overset{|}{C}} - CHO$$
  • $$CH_3CH_2CH = CH - CH_2OH$$
  • $$CH_2 = CH - CHO$$

The correct IUPAC name of the compound is:
1141529_551054bb13aa4ee188328a38936420cf.PNG
  • $$3$$-amino-$$6$$-bromocyclohexane-$$1$$-carboxylicacid
  • $$2$$-bromo-$$5$$-aminocyclohexane-$$1$$-carboxylic acid
  • $$5$$-amino-$$2$$-bromocyclohexane-$$1$$-carboxylic acid
  • $$2$$-bromo-$$5$$-carboxycyclohexanamine
Which of the following will not form acetyl chloride with $$ PCl_{5} $$? 
  • MeCOOH
  • MeCOOMe
  • MeCOOCOMe
  • $$ MeCONH_{2} $$
Cyanohydrin of which of the following gives lactic acid on hydrolysis ?
  • $${ CH }_{ 3 }{ COCH }_{ 3 }$$
  • $${ CH }_{ 3 }{ CHO }$$
  • $${ C }_{ 6 }{ H }_{ 5 }{ CH }_{ 2 }CHO$$
  • $$HCHO$$
Product (C) of the reaction is:
1166694_59c8e1b59e4e4bb490860cd7a6c71e30.PNG
Among the following which one is least soluble in water?
  • $$HCHO$$
  • $$CH_{3}CHO$$
  • $$CH_{3}CH_{2}CH_{2}CHO$$
  • $$CH_{3}CH_{2}CH_{2}CH_{2}CH_{2}CHO$$
Increasing order of equilibrium constant for the formation of a hydrate is: 
1173465_9f36f0ac42f343148242acfa8ba9c0a0.png
  • i < ii < iii < iv
  • iv < ii < i < iii
  • ii < iv < iii < i
  • iv < ii < iii < i
0:0:1


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