CBSE Questions for Class 12 Engineering Chemistry Aldehydes,Ketones And Carboxylic Acids Quiz 10 - MCQExams.com

Diacetone alcohol is also known as ___________.
  • $$4$$-hydroxy butyraldehyde
  • $$4$$-Hydroxy-$$4$$-methyl-$$2$$-pentanone
  • but-$$2$$-en-$$1$$-al
  • butan-$$2,\:4$$-dione
What is the compound $$A$$?
29498.png
  • Oxalic acid
  • Malonic acid
  • Succinic acid
  • Adipic acid
Rochelle salt is :
  • sodium tartarate
  • sodium potassium tartarate
  • ammonium tartarate
  • potassium ammonium tartarate
The enol form of acetone, after treatment with $$ D_{2} O$$ gives :
Which of the following cannot form $$CH_{3}COOH$$ from $$C_{2}H_{5}OH$$?
A) PCC
B) PDC
C) $$K_{2}Cr_{2}O_{7} / H^{+}$$
D)$$KMnO4/ H^+$$
  • A and B only
  • C and D only
  • Only A
  • All A, B, C and D
One mole of an organic compound requires 0.5 moles of oxygen to produce a carboxylic acid. The compound may be :
  • alcohol
  • ether
  • ketone
  • aldehyde
List-A
List-B
Aldehyde
Oxidised product of
Aldehyde
Formaldehyde
A. Acetic Acid
Acetaldehyde
B. Propanoic acid
Propionaldehyde
C. Isobutyric acid
Isobutyraldehyde
D. Methanoic acid

Match the contents in List-A to that in List-B.
  • 1-D, 2-A, 3-B, 4-C
  • 1-A, 2-D, 3-C, 4-B
  • 1-A, 2-C, 3-D, 4-B
  • 1-D, 2-B, 3-C, 4-A
Among the given compounds, the compound which is most susceptible to a nucleophilic attack at the carbonyl group is :
  • $$CH_{3}COCl$$
  • $$CH_{3}CHO$$
  • $$CH_{3}COOCH_{3}$$
  • $$CH_{3}COOCOCH_{3}$$

The major product obtained in the reaction is :

29770_5ea5da6dd7944e839872425b38fa2896.png

From above reaction, the formation of product is:

30812.bmp
  • HCOOH
Statement- I: Carbonyl compounds take part in nucleophilic addition reactions.
Statement- II: These reactions are initiated by nucelophilic attack at the electron deficient carbon atom.
  • Both the statements are true and statement-II is the correct explanation of
    statement-I.
  • Both statements are true but statement-II is not the correct explanation of
    statement-I.
  • Statement-I is true but statement-II is false
  • Statement-I is false but statement-II is true.
In the above sequence of reaction, $$C$$ is __________.
30792_0be3f82543c44c4fa4d4fe538682b6a0.png
An organic compound $$A$$ with molecular formula $$C_{6}H_{6}$$ on treating with $$CH_{3}Cl$$ in presence of anhydrous $$AlCl_{3}$$ gives $$B$$. $$B$$ on treating with nitration mixture gives $$C$$. Compound $$C$$ on reacting with $$K_{2}Cr_{2}O_{7}/H_{2}SO_{4}$$ gives D. Then the compound $$D$$ is :

In the above sequence of reactions, final product $$D$$ is :
30815_1643fdc148d645e2971f9d659d3bf7b1.png
How many moles of ammonia will react with three moles of benzaldehyde to form osazone?
  • 2 moles of ammonia
  • 1 mole of ammonia
  • 3 moles of ammonia
  • 4 moles of ammonia
The compound $$2-$$ methy$$-2-$$butene on reaction with $$NaIO_{4}$$ in the presence of $$KMnO_{4}$$ gives :

29780_cd6cfcd776cc48bcabf89f2fcb926e55.png
  • $$CH_{3}COOH$$
  • $$CH_{3}COCH_{3}+CH_{3}COOH$$
  • $$CH_{3}COCH_{3}+CH_{3}CHO$$
  • $$CH_{3}CHO+CO_{2}$$
Which of the following, on oxidation will not give a carboxylic acid with the same number of carbon atoms?
  • $$CH_{3}COCH_{3}$$
  • $$CCl_{3}CH_{2}CHO$$
  • $$CH_{3}CH_{2}CH_{2}OH$$
  • $$CH_{3}CH_{2}CHO$$

Identify $$A$$.

29768_4f551fa1fecf4d268ebe5b090f916ad1.PNG
  • $$HCHO$$
  • $$CH_{3}CHO$$
  • $$C_{6}H_{5}CHO$$
  • $$CH_{3}COCH_{3}$$
The oxidation products of 1-nitronaphthalene and $$\alpha$$-naphthylamine respectively are :
  • phtalic acid and 3-aminophthalic acid
  • 3-nitrophtalic acid and phtalic acid
  • phtalic acid and phthalic acid
  • 3-nitrophtalic acid and 3-aminophthalic acid
P -cresol reacts with chloroform in an alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound B. The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is:
In the above sequence of reactons D is :
31536_0495830f45964402830e1d46d63a55e6.png
The correct product of the following sequence of reactions is:

$$(CH_{3})_{2} CHCOOH\xrightarrow[(iiH_{2}O)]{(i)LiAH}\xrightarrow[]{PBr_{3}}\xrightarrow[DMSO]{KCN}\xrightarrow[\Delta]{H_{2}O,H^{+}}$$?
  • $$(CH_{3})_{2}CHCHBrCOOH$$
  • $$(CH_{3})_{2}CHCH_{2}COOH$$
  • $$(CH_{3})_{2}CHCH_{2}CH_{2}NH_{2}$$
  • $$(CH_{3})_{2}C = CHCOOH$$
Which one of the following undergoes reaction with $$50\%$$ sodium hydroxide solution to give the  corresponding alcohol and acid?
  • Phenol
  • Benzaldehyde
  • Butanal
  • Benzoic acid
In the above sequence of reactions, $$E$$ is :
31538_27a647447dee4e79b5d6ea8c61cb2d28.png
In the given reaction,
$$ CH_3COCH_3 \xrightarrow{CH_3C\equiv \overset{\Theta}{C}\overset{\oplus }{Na}} X \xrightarrow[]{H_2O} Y\xrightarrow[]{H_2-Pd/CaCO_3}Z\xrightarrow[]{Al_2O_3} $$ W, W is:
  • $$CH_2=CH-CH=CH_2$$
  • $$CH_3-CH=CH-CH=CH_2$$
  • $$(CH_3)CH=CH-C(CH_3)=CH_2$$
  • $$CH_3CH=CH-CH=CH-CH_3$$
The IUPAC name of the compound given below is:
$$ CH_{3}CH_{2}CO CH_{2} CH_{3}$$
  • 1-pentanone
  • 2-pentanone
  • 2-carboxybutane
  • 3-pentanone
Compound 'P' of the following reaction sequence can be :
117487_fafeaf9930294b29bd5ca129ea7c0d39.png
Which of the following compound cannot have the condensed formula $$C_5H_{10}O$$?
  • An aldehyde
  • A ketone
  • An alkenol
  • A cyclic ketone
The correct order of rate of reaction toward nucleophilic addition reaction.
991986_c0ead192757244f99361e278031b11f6.jpg
  • a $$>$$ b $$>$$ c $$>$$ d $$>$$ e
  • a $$>$$ b $$>$$ d $$>$$ c $$>$$ e
  • a $$>$$ d $$>$$ e $$>$$ b $$>$$ c
  • a $$>$$ b $$>$$ e $$>$$ d $$>$$ c
The final product of the following sequence of reaction is?
$$(CH_3O)_2CHCH_2CH_2CH_2Br\overset{Mg}{\rightarrow}\overset{H_2C=O}{\rightarrow}\overset{H_3O^+}{\underset{heat}{\rightarrow}}$$
  • $$CH_3O\overset{O}{\overset{||}{C}}CH_2CH_2CH_2CH_2OH$$
  • $$CH_3\overset{O}{\overset{||}{C}}CH_2CH_2CH_2CH_2OH$$
  • $$H\overset{O}{\overset{||}{C}}CH_2CH_2CH_2CH_2OH$$
  • $$H\overset{O}{\overset{||}{C}}CH_2CH_2CH_2\overset{O}{\overset{||}{C}}H$$
Product (A) is?
992201_d707b75eb1564499bbec8f7a946c5d44.png
Which one of the following compounds is the best choice for being prepared by an efficient mixed aldol addition reaction?
Given the best condition for this transformation:
993116_37863131278e4d8c8f6f542ecb43437f.png
  • $$CH_{3}OH,H^{+}$$(cat.), heat
  • $$H_{2}O,H_{+}$$(cat.), heat
  • $$Mg, ether, CH_{3}OH$$
  • $$SOCl_{2}, CH_{3}OH$$
The IUPAC name of the compound is:

996503_065907f945c34251b820da670ab227f7.jpg
  • $$2$$-hydroxypropanoic acid
  • $$1$$-hydroxypropanoic acid
  • $$1$$-hydroxyehtane carboxylic acid
  • $$1$$-hydroxyethanoic acid
The IUPAC name of the compound is:
996334_1251a63fb6334936b46986303f576800.jpg
  • but-$$1$$-en-$$4$$-oic acid
  • $$1$$-hydroxybut-$$2$$-en-$$1$$-one
  • but-$$2$$-en-$$1$$-oic acid
  • but-$$2$$-en-$$4$$-oic acid
Which of the following reagent is used for the separation of acetaldehyde from acetophenone?
  • $$NH_2OH$$
  • $$NaOl$$
  • Tollen's reagent
  • $$C_6H_5NHNH_2$$
What combination of acid chloride or anhydride and arene would you choose to prepare given compound?
993482_1ba9a5672a244c1dbacc68146486a678.jpg
Which of the following sets of reagents, used in the order shown , would successfully accomplish the conversion shown ?
993278_9c5066d7fb7b4a42a9d7b5797a5aa6d3.png
  • $$CH_{ 3 }CH_{ 2 }CH_{ 2 }MgBr$$; $$H_{ 3 } O^{ + }$$; $$PCC$$, $$CH_{ 2 }CI_{ 2 }$$
  • $$CH_{ 3 }CH_{ 2 }CH_{ 2 }MgBr$$; $$H_{ 3 }O^{ + }$$; $$H_{ 2 }SO_{ 4 }$$, $$heat\ PCC, CH_{ 2 }CI_{ 2 }$$
  • $$(C_{ 6 }H_{ 5 })_{ 3 } \overset { + }{ P } -\overset { - }{ C } HCH_{ 2 }CH_{ 3 }$$, $$B_{ 2 }H_{ 6 }$$; $$CH_{ 3 }CO_{ 2 }H$$
  • $$(C_{ 6 }H_{ 5 })_{ 3 } \overset { + }{ P } -\overset { - }{ C } HCH_{ 2 }CH_{ 3 }$$; $$H_{ 2 }O$$
n-Butylbenzene on oxidation with hot alkanine $$KMnO_4$$ gives:
  • Benzoic acid
  • Butanoic acid
  • Benzyl alcohol
  • Benzaldehyde
Reaction - (1) : $$CH_{3} - CH = CH - CH_{3} \xrightarrow [ Cold ]{ KMn{ O }_{ 4 } } \left( A \right) \xrightarrow [  ]{ NaI{ O }_{ 4 } } \left( B \right) \ 2\ mole$$


Reaction - (2) : $$CH_{3} - CH = CH - CH_{3} \xrightarrow [  ]{ KMn{ O }_{ 4 }/NaIO_{4} } \left( A \right) \xrightarrow [  ]{ NaI{ O }_{ 4 } } \left( B \right) \ 2\ mole$$

Products $$(B)$$ and $$(C)$$, respectively, are :
  • $$CH_{ 3 }CHO, CH_{ 3 }CO_{ 2 }H$$
  • $$CH_{ 3 }CO_{ 2 }H, CH_{ 3 }CHO$$
  • $$CH_{ 3 }CHO$$ in both reaction
  • $$CH_{ 3 }CO_{ 2 }H$$ in both reaction
Identify the position where electrophilic aromatic substitution(EAS) is most favourable.
993426_6625f7997f8a418384fc73579642be14.jpg
  • A
  • B
  • C
  • A and C
Arrange the following compounds in correct order of acidic strength.
  • $$HCOOH>CH_3COOH>C_6H_5OH>C_2H_5-OH$$
  • $${ CH }_{ 3 }COOH>HCOOH>C_6H_5OH>C_2H_5-OH$$
  • $${ C }_{ 6 }{ H }_{ 5 }{ OH }>HCOOH>CH_3COOH>C_2H_5-OH$$
  • None of these
The IUPAC name of $$NC - CH_2 - CH_2 - COOH$$ is:
  • $$3$$- carboxy propanenitrile
  • $$4$$- cyanobutanoic acid
  • $$2$$- cyanomethane Carboxylic acid
  • $$3$$- cyanopropanoic acid
What is the name of this following compound?
$$CH_3CH_2COCl$$ 
  • Butanoyl chloride
  • Propanoyl chloride
  • 1 chloro propanone
  • None of these
An organic compound, $$C_3H_8O$$ does not give a precipitate with $$2,4$$-dinitrophenyl hydrazine reagent and does not react with metallic sodium. It could be:
  • $$CH_3-CH_2-CHO$$
  • $$CH_2=CH-CH_2OH$$
  • $$CH_3-O-CH_3$$
  • $$CH_2=CH-O-CH_3$$
The most possible product is:
1068383_544134b87b74471585be399e24bcf195.png
The product of the reaction $$X$$ will be:
1067397_13e1e35046234d8ea7863cfd553b6d70.png
  • $$C_{6}H_{5}-CH=CH-COOH$$
The correct name of the given compound :
$${ CH }_{ 3 }-\overset { \underset { | }{ H }  }{ \underset { \overset { | }{ OH }  }{ C }  } -{ COOH }$$
  • glycoxal
  • lactic acid
  • glycine
  • glyceraldehyde
(i) $$H_3C-\overset{O}{\overset{||}{C}}-CH_3$$
(ii) $$H_3C-\overset{O}{\overset{||}{C}}-CH_2-\overset{O}{\overset{||}{C}}-CH_3$$
(iii) $$Ph-OH$$
(iv) $$H_3C-\overset{O}{\overset{||}{C}}-OH$$

Among the compounds the correct order of $$pKa$$ values are:
  • $$IV < III < II < I$$
  • $$IV < I < II < III$$
  • $$IV < II < III < I$$
  • $$IV < III < I < II$$
Carbonyl group is converted into methylene group by?
  • Acidic reduction
  • Raney Ni
  • Basic hydrolysis
  • Normal Hydrogenation
0:0:1


Answered Not Answered Not Visited Correct : 0 Incorrect : 0

Practice Class 12 Engineering Chemistry Quiz Questions and Answers