CBSE Questions for Class 12 Engineering Chemistry Aldehydes,Ketones And Carboxylic Acids Quiz 1 - MCQExams.com

The reagents X and Y are respectively :


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  • $$X = CH_{3}COCl / AlCl_{3}, Y = KMnO_{4} / OH^{\Theta } / \Delta ,$$ (acidification)
  • $$X = CH_{3}CH_{2}Cl / AlCl_{3}, Y = CrO_{3} / H^{+ } / \Delta $$
  • $$X = CH_{3}COCl /AlCl_{3}, Y= I_{2} / NaOH,$$ (acidification)
  • $$X= KMnO_{4} /OH^{\Theta } / \Delta ,$$ (acidification), $$Y=CH_{3}CH_{2}Cl

    / AlCl_{3}$$
Which of the following reactions will give $$\displaystyle \alpha -$$ hydroxy acid as a product?
  • $$\displaystyle CH_{3}-CHO\xrightarrow[\left ( ii \right )H_{2}O/H^{\oplus }/\Delta ]{\left ( i \right )NaCN/HCl}$$
  • $$\displaystyle CH_{3}-CHO+Br-CH_{2}-COOC_{2}H_{5}\xrightarrow[\begin{matrix}

    \left ( ii \right )NH_{4}Cl/HOH\\

    \left ( iii \right )HOH/H^{\oplus }/\Delta

    \end{matrix}]{\left ( i \right )Zn}$$
  • $$\displaystyle CH_{3}-COOH\xrightarrow{NaOH/HOH}$$
  • All of these
The IUPAC name of acetyl acetone is :
  • pentane-2,5-dione
  • pentane-2,4-dione
  • hexane-2,4-dione
  • butane-2,4-dione
In the given reaction, the product $$(B)$$ is :

$$\displaystyle CH_{3}CHO\xrightarrow[\left ( ii \right )H_{2}O/H^{\oplus }/\Delta ]{\left ( i \right )NaCN/HCl}\left ( A \right )\xrightarrow[reagent]{Fenton}\left ( B \right )$$
  • acetic acid
  • oxalic acid
  • pyruvic acid
  • citric acid
Which of the following is example of 1,4- addition reaction ?
When D - glucose is treated with $$\displaystyle HNO_{3}$$ then the product is :
Which set of reaction condition is best suited for the preparation of $$5-oxohexanoic$$ acid from $$5-bromo-2-pentanone$$?
  • i) $$NaCN$$ in ethanol;$$\, \, $$ ii) $$H_3O^{(+)}$$ & heat
  • i) $$NaC\equiv CH$$ in ether;$$\, \, $$ ii) aqueous $$KMnO_4$$ & heat
  • i) Mg in ether;$$\, \, $$ ii) $$CO_2$$, then $$H_3O^{(+)}$$
  • i) $$NaOH$$ in ethanol;$$\, \, $$ ii) John's regent
When D-glucose is treated with $$\displaystyle Br_{2}$$ water then the product is :
IUPAC name of the following compound is:
118014.jpg
  • 6-ethyl-1,4, 6-octanetrioic acid
  • 5-Ethyl -hexane-1, 3, 6-tricarboxylic acid
  • 3-ethyl-5-carboxyoctanedioic acid
  • 4-carboxy-6-ethyloctanedioic acid
Which sequence of reactions would be best for the conversion of toluene into para-bromopheny lacetic acid? (NBS = N-bromosuccinimide)
  • $$i) \,Br_2$$ and $$FeBr_3 ;\, \, ii) \,KMnO_4$$ and $$heat ;\, \, iii) \,NaCN$$ in ethanol $$;\, \, iv) \,H_3O^{+}$$ and $$heat$$
  • $$i) Br_2$$ and $$FeBr_3; \, \, ii) \,NBS \,in \,CCl_4;\, \, iii) \,Mg$$ in ether followed by $$ CO_2;\, \, iv)\, H_3O^{+}$$
  • $$i)\, Br_2$$ and $$FeBr_3; \, \, ii)\, NBS \,in \,CCl_4;\, \, iii)\, NaCN$$ in ethanol $$ iv)\, H_3O^{+}$$
  • $$i)\, Br_2$$ and $$FeBr_3; \, \, ii)\, KMnO_4$$ and $$heat;\, \, iii)\, Mg$$ in ether followed by $$CO_2;\, \, iv)\, H_3O^{+}$$
Which of the following compound would be appropriate for the synthesis of amino acid (2)?
201903.png
  • 2-methyl propanal
  • 2-methyl propanoic acid
  • 3-methyl butanal
  • 3-methyl butanoic acid

What is the final product of the above reaction sequence?
206099_d3fb307f3f1f4501b97e52f39eba860d.png
Which reagent from the below the list should be used to effect the transformation shown?
201467.png
  • $$1)\, LiAlH_4/Et_2O;\, \, 2)\, Br_2/H_2O;\, \, 3)\, K_2CO_3/H_2O$$
  • $$OsO_4/KIO_4/H_2O/Acetone$$
  • $$1)\, (COCl)_2/Me_2SO/Et_3N/-60^oC;\, \, 2)\, NaBH_4/EtOH/\triangle$$
  • $$K_2Cr_2O_7/H_2SO_4/H_2O/Acetone$$

208119.png
  • Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
  • Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
  • Assertion is correct but Reason is incorrect
  • Assertion is incorrect but Reason is correct
Which set of reaction conditions is best suited for the preparation of 5-oxo-hexanoic acid from 5-bromo-2-pen-tanone?
  • i) $$NaCN$$ in ethnol;$$\, \, $$ ii) $$H_3O^{(+)}$$ & heat
  • i) $$NaC\equiv C$$ ether;$$\, \, $$ ii) aqueous $$KMnO_4$$ & heta
  • i) Mg in ether;$$\, \, $$ ii) $$CO_2$$, then $$H_3O^{(+)}$$
  • i) $$NaOH$$ in ethnol;$$\, \, $$ ii) Joes' regent
The reagent used to convert reactant into product is:
205132.png
  • $$NaCN$$, $$H_3O^+$$
  • $$KCN$$, $$H_2O$$
  • $$KMnO_4$$
  • $$KOH$$, $$KMnO_4$$
What is the product of addition of $$H_2O$$ to methyl isocyanate $$CH_3-N = C = O$$?
The product of the given reaction is :
206434_c779a39776934dedb5ab7279bb2a7abe.png
In which of the following reaction, one of the product is a carboxylic acid:
  • $$CH_3CH_2CHO + Ag(NH_3)_2^+ \rightarrow$$
The compound (C) is:
Identify the product formed in the given reaction.
244194.jpg
  • $$CH_3COOH$$
  • .$$CH_3CH_2COOH$$
  • .$$CH_3CH_2CH_2COOH$$
  • .
The structure of compound (A) is :
The given reaction is a :
243408_6978196eae0d42c08d6a11a54a170bcf.png
  • 1,4 addition reaction
  • 2,3 addition reaction
  • Neutralisation reaction
  • none
The colour of $$Cr_2O_7^{2-}$$ changes from orange to blue-green when added to compound (A). The blue-green colour is due to the formation of :
  • $$Cr^{2+}$$
  • $$Cr^{3+}$$
  • $$CrO_4^{2-}$$
  • $$CrO_5$$
Identify the functional group in Product B?
243407.PNG
  • Ketone
  • Carboxylic acid
  • aldehyde
  • none
The colourless and odourless gas (B) is:
  • $$CO$$
  • $$CO_2$$
  • $$H_2$$
  • $$H_2O$$
Which of the following on oxidation with alkaline $$KMnO_4$$ followed by acidification with dil. $$HCl$$ gives terephthalic acid?
  • p-Ethyl toluene
  • n-Butane
  • 1,3 - Di-isopropyl benzene
  • m-Xylene
In the following sequence of reactions, products (A) to (H) are formed. Then the Compound (D) is :

249177_edffda6300b44436a6c13615d7e7f570.png
In the following sequence of reactions, products (A) to (H) are formed. Then the Compound (B) is :

249165_b644bae322e046f7acd17a521894e55e.png
In the following sequence of reactions, products (A) to (H) are formed. Then the Compound (F) is :

249181_0566accd81e54bd59f82bc6a2f17b3d4.png

Select the correct group(s) of reagent(s) used in the following conversions:
249223_a03b8878f4934ab98ae1f3e438fcfe5f.png
  • $$ I \Rightarrow dil. HNO_3, II \Rightarrow Na_2Cr_2O_7 / H_2SO_4, III \Rightarrow KMnO_4 / NaOH, IV \Rightarrow PbO_4 / O^{\ominus} H, H_3O^{\bigoplus}$$
  • $$I \Rightarrow dil HNO_3, II \Rightarrow KMnO_4 / H^{\bigoplus}, III \Rightarrow KMnO_4 / NaOH, IV \Rightarrow TsCl + acidic KMnO_4 + H_2O$$
  • $$I \Rightarrow KMnO_4 / NaOH, II \Rightarrow Na_2Cr_2O_7 / H^{\bigoplus}, III \Rightarrow KMnO_4 / O^{\ominus}H, IV \Rightarrow dil. HNO_3$$
  • $$I \Rightarrow CrO_3 / MeCOOH, II \Rightarrow KMnO_4 / O^{\ominus} H, III \Rightarrow KMnO_4 / H^{\bigoplus}, IV \Rightarrow dil. HNO_3$$
Reagent (A) is :
250311.jpg
  • HBr
  • HBr + R O - O R + hv
  • HI
  • HCl + R O O R
In the following sequence of reactions, products (A) to (H) are formed. Then the Compound (C) is :

249171_03238bac597b4732a7a885a3f6f78791.png
For the following reaction, which of the following statements is correct?
249327_6abc586b84bf41ebb70e2b880f68f01b.png
  • Ring (A) is oxidised
  • Ring (B) is oxidised
  • Both are oxidised
  • None is oxidised
In the following sequence of reactions, products (A) to (H) are formed. Then the Compound (H) is :

249191_9ea5576ce57d467eb8d987652cbeb456.png
What is the final product (B) of this sequence?

263351.png
$$\text{(F)}$$ on ozonolysis will produce:
  • acetic aicd
  • formic acid
  • propanoic acid
  • formaldehyde
Reagent (C) is :
250315_fe4c9eb18b1b4d78b3e00453447a5d3a.png
  • $$O_3/Ph_3P$$
  • $$O_3/NaBH_4$$
  • $$O_3/H_2O_2$$
  • $$KMnO_4/\overset{\ominus }{O}H$$
In case of aldehydes and ketones there is the addition of nucleophile but in case of acyl compound, there is a nucleophilic substitution.
  • True
  • False
(D) and (C) are :
  • Isomeric alkane
  • Isomeric alkene
  • Not isomers
  • (C) is an alkene and (D) is salt
$$\displaystyle RCOCl + H_2 \overset{Pd + BaSO_4}{\longrightarrow} A \overset{HCN}{\longrightarrow} B \overset{H_3O^{\oplus}}{\longrightarrow} C$$

In the reaction sequence A, B and C are given by the set:-
  • $$RCHO, \quad  RCH(OH)CN, \quad  RCH(OH)CH_2NH_2$$
  • $$RCHO, \quad RCH(OH)CN, \quad RCH(OH)COOH$$
  • $$RCHO, \quad R-CH_2-CN, \quad R-CH_2-COOH$$
Why is the conversion of ethanol to ethanoic acid an oxidation reaction?
  • Carbon is oxidized.
  • Hydrogen oxidation number is changed.
  • carbon is reduced.
  • carbon undergoes disproportination.
In the given sequence of reactions, predict $$(X)$$.
$$(X)\xrightarrow [ { H }_{ 2 }O ]{ KOH }  (Y) \xrightarrow [ 433K ]{ { Al }_{ 2 }O_{ 3 } }  (Z) \xrightarrow [  ]{ [O] }  2mol {CH}_{3}COOH$$
  • $${CH}_{3}{CH}_{2}CH(I){CH}_{3}$$
  • $${CH}_{3}{CH}_{2}{CH}_{2}{CH}_{2}I$$
  • $${CH}_{3}CH(I)CH(I){CH}_{3}$$
  • $${CH}_{3}CH(I){CH}_{2}{CH}_{2}I$$
Select the correct statements.
332758_927fb9aca68f48028a17394cfac2092c.png
  • $$(Z)$$ has three carbonyl groups
  • Formation of $$(X)$$ involves equilibrium mixture of the iminium salt and the acylated enamine
In the given reaction, $$A$$ also reacts with $$NaOI$$ followed by the reaction with $$H^+$$ to give $$3,\,4-$$dilhydroxybenzoic acid. Which of the following is correct?

306083_fab8b1b3acdf499a826ddb0a7205830a.png
  • $$'C'$$ is optically active which is derived from $$A$$
  • No other side product is formed along with $$'A'$$
In section A, there are some organic compounds and in section B, their uses are mentioned. Match the correct options.
Section A
Section B
Ethanol
(a) Nail polish remover
Formalin
(b) To have sour taste in food
Acetone
(c) In fragrant materials like perfumes
Ethanoic Acid
(d) To preserve dead bodies
  • (1-c), (2-d), (3-a), (4-b)
  • (1-a), (2-d), (3-c), (4-b)
  • (1-b), (2-a), (3-d), (4-c)
  • (1-d), (2-c), (3-b), (4-a)
The reaction of ethyl methyl ketone with $$Cl_2/$$ excess $$OH^-$$ gives the following major product.
  • $$ClCH_2CH_2COCH_3$$
  • $$CH_3CH_2COCCl_3$$
  • $$ClCH_2CH_2COCH_2Cl$$
  • $$CH_3CCl_2COCH_2Cl$$
A compound, containing only carbon, and hydrogen and oxygen, has a molecular weight ofOn complete oxidation it is converted into a compound of molecular weightThe original compound is:
  • an aldehyde
  • an acid
  • an alcohol
  • an ether
Butyraldehyde are produced commercially by:
  • hydroformylation
  • hydroacetylation
  • formylation
  • acetylation
The compound formed as a result of oxidation of ethyl benzene by $$KMnO_{4}$$ is:
  • acetophenone
  • benzophenone
  • benzoic acid
  • benzaldehyde
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