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

For the synthesis of benzoic acid, the only correct combination is:
  • (I) (iv) (Q)
  • (III) (iv) (R)
  • (IV) (ii) (P)
  • (II) (i) (S)
The only correct combination in which the reaction proceeds through radical mechanism is:
  • (III) (ii) (P)
  • (I) (ii) (R)
  • (IV) (i) (Q)
  • (II) (iii) (R)
The major product formed in the given reaction is:
739797_aa69cc543e1d42059a0b1efc5b71de52.png
Which of the following is nucleophilic addition reaction?
  • Hydrolysis of ethyl chloride by $$NaOH$$
  • Purification of acetaldehyde by $$NaHS{ O }_{ 3 }$$
  • Alkylation of anisol
  • Decarboxlation of acetic acid
Polarisation of electrons in acrolein may be written as:
  • $$\overset{\delta +}{C}H_2=CH-CH=\overset{\delta -}{O}$$
  • $$\overset{\delta +}{C}H_2=\overset{\delta +}{C}H-CH={O}$$
  • $$\overset{\delta +}{C}H_2=CH-CH-\overset{\delta +}{OH}$$
  • $$\overset{\delta +}{C}H_3=CH-\overset{\delta +}{C}H={O}$$
In the reaction,
$$CH_{3} - CH = CH - CHO \underset {alkaline}{\xrightarrow {Oxidizing\  Agent}}CH_{3}- CH = CH - COOH$$, the oxidizing agent can be:
  • alkaline $$KMnO_{4}$$
  • acidified $$K_{2}Cr_{2}O_{7}$$
  • Benedict's solution
  • all of the above
$$R-C{ H }_{ 2 }-C{ H }_{ 2 }OH$$ can be converted to $$R-C{ H }_{ 2 }C{ H }_{ 2 }COOH$$. The correct sequence of reagents is:
  • $$P{ Br }_{ 3 },KCN,{ H }_{ 3 }{ O }^{ + }$$
  • $$P{ Br }_{ 3 },KCN,{ H }_{ 2 }$$
  • $$KCN,{ H }^{ + }$$
  • $$HCN,P{ Br }_{ 3 },{ H }^{ + }$$
In a set of reactions, ethylbenzene yielded a product D. D would be: 
1168285_ea42d0877213443088324b952abbb542.png
The IUPAC name of given compound is:
1172020_5a74c0e51f854188b6b07437dd252f16.png
  • 2-Chlorocarbonyl ethylbenzoate
  • 2-Carboxyethyl benzoyl chloride
  • Ethyl-2-(chlorocarbonyl) benzoate
  • Ethyl-1-(chlorocarbonyl) benzoate
A compound 'X' gives brisk effervescence of $$CO_2$$ on treatment with $$NaHCO_3$$ and when treated with $$LiAlH_4$$ gives ethyl alcohol. Therefore 'X' may be:
  • $$CH_3COCH_3$$
  • $$CH_3CH_2CHO$$
  • $$CH_3CHO$$
  • $$CH_3COOH$$
Give the decreasing order of nucleophilic addition reaction of the following :
(i) $$ { HCHO }$$                                        (ii)  $$PhCHO$$
(iii) Chloral  $$\left( \mathrm { Cl } _ { 3 } \mathrm { C } - \mathrm { CH } = O \right)$$       (iv) $$Acetophenone$$
  • $$(iii)>(i)>(ii)>(iv)$$
  • $$(iv) > (i i) > (i) > (iii)$$
  • $$(i) > (iii) > (ii )> (iv)$$
  • $$(iii)>(i)>(iv)>(ii)$$
Major product of the reaction is :
1201965_6b0b3614ab49438795c3eec21638fa47.png
One of the most common alcohol used for protection of carbonyl group is: 
  • Glycol
  • Glycerol
  • 1, 3-propanediol
  • Ethanol
IUPAC name is:
1202256_6f5ac4ca2522439087368c5e21e4ba1c.PNG
  • 4-Carboxy-5-methyl heptanoic acid
  • 1,3-Dicarboxy-4-methyl hexane
  • 4-(1-Methyl propyl)-pentane-dioic acid
  • 2-(1-Methyl propyl)-1,5-pentane-dioic acid
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
The conversion $${ CH }_{ 3 }CH=CHCHO\rightarrow { CH }_{ 3 }CH=CHCOOH$$ can be effected by
  • alkaline $${ KMnO }_{ 4 }$$
  • acidic $${ K }_{ 2 }{ Cr }_{ 2 }{ O }_{ 7 }$$
  • ammonical $${ AgNO }_{ 3 }$$
  • selenium dioxide
The major product "A" obtained in the given reaction is:
1200413_fd53eba33ad24c9f82360be44b5ca838.png
Which of the following has the most acidic hydrogen?
  
1233782_860dd4db9d0a4c24b5b13908a27c7cb8.png
$$CH_3-CH=CH-CHO \underrightarrow A$$
The best suitable reagent 'A' is
  • $$C_3H_8S_2/H_2/Ni$$
  • $$N_2H_4/KOH$$
  • $$Zn-Hg/Conc.HCl$$
  • $$H/P(red)$$
The IUPAC name of following compound is 
1273078_0c24815b73ab4418bbeef1db55a5d2ba.PNG
  • 3,4 hydroxyphenylbutanone
  • 4-ethylethanoylphenol
  • 2-(4-hydroxyphenyl ) butan-3-one
  • 3-(-4hydroxyphenly) butan-2-one
How many ketones are possible with molecular formula $$C_6H_{12}O$$?
  • $$5$$
  • $$6$$
  • $$7$$
  • $$8$$
IUPAC name of given compound is:-
1293021_30a0ed70ca074c569e2ead6a0077efeb.PNG
  • $$6$$-Oxo-$$4$$-formyl cyclohexane carboxylic acid
  • $$4-$$ Formyl-$$2$$-oxo cyclohexane carboxylic acid
  • $$4$$- Formyl-$$2$$- oxo cyclohexanoic acid
  • $$1$$- Carboxy-4-formyl-2-oxo cyclohexane
Lowest $$pK_a$$ is associated with?
Consider the acidity of the carboxylic acids.
(i)  $$PhCOOH$$
(ii) o- $$NO_{2}C_{6}H_{4}COOH$$
(iii) p - $$NO_{2}C_{6}H_{4}COOH$$
(iv) m - $$NO_{2}C_{6}H_{4}COOH$$
which of the following order is correct ?
  • $$(i) > (ii) > (iii) > (iv)$$
  • $$(ii) > (iv) > (iii) > (i)$$
  • $$(ii) > (iv) > (i) > (iii)$$
  • $$(ii) > (iii) > (iv) > (i)$$
Arrange the following carbonyl compounds in decreasing order of reactivity towards nucleophilic addition:
1302808_17c0492b433d49dd930ee6b40fbcfb0b.PNG
  • D < A > B > C
  • B > C > A > D
  • D > A < B < C
  • D <A < B < C
Which carbonyl group of the given compound is most reactive for hydration:
1295839_4ac75962e5c846818ed704636387977c.PNG
  • 3
  • 1
  • 2
  • All have equal reactivity
What is the order of indicated bond length for the above set of molecules:
1280679_cc3e427539f44911a0c1552104458463.png
  • $$I>II>III>IV$$
  • $$II>III>I>IV$$
  • $$IV>I>II>III$$
  • $$IV>III>II>I$$
Which of the following has longest bond length?
  • $$C = O$$
  • $$N = O$$
  • $$C = C$$
  • $$C = N$$
Compare acidic strength of the following compound :
1318127_fa12a891652849028608172587ea9270.png
  • $$P > Q > R$$
  • $$Q > P > R$$
  • $$R > P > Q$$
  • $$P > R > Q$$
A is :
1323027_ecd2efa0da2144bbb98bfedd94ec3b23.png
The IUPAC name of above compound is:
1307013_452ec8f41bb94a43af8d6eddbb320d7f.png
  • 1-Hydroxy-4-methyl-3-pentanone
  • 2-Methyl 5-hydroxy-3-pentanone
  • 4-Methyl 3-oxo-1 -pentanol
  • Hexan-1-one -3-ol
Which of the following form stable product with $$H_2O$$
  • $$H-CHO$$
  • $$All$$
The relative acidity of the indicated $$H$$ in each of the following is :
1320931_cab26d126f924b9ea74aae9ee24aa806.png
  • $$i > ii > iii$$
  • $$ii > iii > i$$
  • $$i > iii > ii$$
  • $$iii > i > ii$$
Which has most acidic proton from the following?
  • $$None\ of\ these $$
The IUPAC name of given compound is:
1311915_81e8c177ad354b568eea415e4b2d1556.png
  • Ethoxy methanone
  • Ethoxy propanone
  • Ethyl-2-methyl propanoate
  • 2-methyl ethoxy propanone
Which of the following is correct option of reagent for the given conversion? 
1340862_61720baed532457e8a73bb6d7d858fb6.PNG
  • $$Cl_{2}/hv,CH_{3}MgBr,Br_{2}/hv,CH_{3}COOH$$
The compound $$'A'$$ is
1340577_56327b1961084208986c9a04aa6ba5ba.PNG
Identify number of reagent that can be used for above conversion.
1365111_41060b8b6f0d4d50b346da28bc21fa60.png
  • Zn-Hg/HCl
  • $$LiAlH_{4}$$
  • $${ N }_{ 2 }{ H }_{ 4 }/\overset { \circleddash }{ O } H$$
Reactant $$(A)$$ and product $$(B)$$ are respectively:
1369150_db83050957de4672931e60c15d5eaf83.PNG
Arrange acidity of given four compounds in decreasing order :
(I) $$ CH_{ 3 }-\overset { \overset { O }{ || }  }{ C } -CH_{ 2 }-\overset { \overset { O }{ || }  }{ C-CH_{ 3 } }  $$
(II) $$ CH_{ 3 }-\overset { \overset { O }{ || }  }{ C } -CH_{ 3 } $$
(III) HC≡CH
(IV) $$ CH_3-CHO $$
Select correct answer from the codes given below 
  • I > IV > III > II
  • I > IV > II > III
  • III > I > IV > II
  • II > IV > I > III
The correct statement(s) regarding above reaction is/are
1374523_4295ef5f567d47b1b2dd52819b63d5d2.PNG
  • Final product is given as
  • The reaction is reversible in nature
  • The product is cyclic ketal
  • All of these

The IUPAC name of compound is:
1363301_36a4940aaed74916be8819bd6f3a507b.jpg
  • 2,2-diethyl pentanoic acid
  • 3,4-dimethyl hexanoic acid
  • 2-methyl-4-ethyl pentanoic acid
  • 4-ethyl-2-methyl pentanoic acid
The compound with the most acidic hydrogen is 
  • $$CH_{3}CHO$$
  • $$CH_{3}COCH_{3}$$
  • $$CH_{3}-CO-CH_{2}CO_{2}CH_{3}$$
The major product formed in the above reaction is:
1364192_3bb40105ee1149e1955ca6b7f58a8de2.JPG
  • Both A and B
The $$IUPAC$$ name of the given compound is:
1453201_ad85b1f124b94e1cb66f219e35a9b9d3.png
  • $$2-$$(Hydroxy methyl) methyl propanedioate
  • $$Methyl-2-$$(hydroxy methyl) propanedioate
  • $$2-$$(Hydroxy methyl) dimethyl propanedioate
  • $$None\ of\ these$$
The most reactive compound towards formation of cyanohydrin on treatment with $$KCN$$ followed by acidification is:
  • Benzaldehyde
  • p-nitrobenzaldehyde
  • Phenyl acetaldehyde
  • p-hydroxy benzaldehyde
When benzaldehyde is heated with acetic anhydride in the presence of sodium acetate, the product obtained is
  • Cinnamic acid
  • Phenyl acetic acid
  • Benzoic acid
  • Benzoic anhydride
In the reaction, the products $$X$$ and $$Y ,$$ respectively, are-

1467619_4baf56a428a8469abed798103d0cc0eb.jpg
  • $$\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } , \mathrm { CH } _ { 3 } \mathrm { COOH }$$
  • $$\mathrm { CH } _ { 3 } \mathrm { OH } , \mathrm { HCOOH }$$
  • $$\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } , \mathrm { CH } _ { 3 } \mathrm { CHO }$$
  • $$\mathrm { C } _ { 2 } \mathrm { H } _ { 5 } \mathrm { OH } , \mathrm { HOCH } _ { 2 } \mathrm { CH } _ { 2 } \mathrm { OH }$$
Reaction of the following substance with nitric acid would yield:
1380080_f41aa03ba01549c0a5250ee690512462.PNG
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