aldehydes, ketones and carboxylic acids questions
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7/21/2019 Aldehydes, Ketones and Carboxylic Acids Questions
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Aldehydes, Ketones and Carboxylic Acids MCQs Questions: Paper 1
Sr.No.
Questions Ansers
1. Which of the following acids does not exhibit optical
isomerism? [CBSE AIPMT 2012](A)Lactic acid(B)Tartaric acid(C)Maleic acid(D)-amino acids
Answer: (C)
2. C!C" and C#$C2C" can be disting%ished chemicall&b&' [CBSE AIPMT 2012](A)Tollen(s reagent test(B))ehling sol%tion test(C)*enedict test(D)+odoform test
Answer: (D)
!. The correct order of decreasing acid strength of trichloroaceticacid(A), tri%oroacetic acid */, acetic acid C/ and formic acid
0/ is[CBSE AIPMT 2012](A) * C 0(B) C * 0(C)* 0 C(D)* 0 C
Answer (C)
3. Which of the following reactions will not res%lt in the formationof carbon-carbon bond? [CBSE AIPMT 2010](A)4eimer-Tieman reaction(B))riedel Crafts ac&lation(C)W%rt5 reaction(D)Canni55aro reaction
Answer: (D)
$. "ne mole of a s&mmetrical al6ane on o5onol&sis gi7es two
moles of an aldeh&de ha7ing molec%lar mass of 33%. Theal6ene is: [AIEEE 2010](A)8thene(B)9ropene(C)1-b%tene(D)2-b%tene
Answer: (D)
#. "ne mole of an organic compo%nd (( with the form%la C!:"reacts completel& with two moles of + to form ; and answers theiodoform test. The compo%nd (( is . [Karnataka CET2010](A)9ropan-1-ol(B)9ropan-2-ol
(C)ethoxðane(D)methoxðane
Answer: (D)
@.
The +A9C name of is . [Karnataka CET2010](A)2-meth&l-!-bromohexanal(B)2-meth&l-!-bromob%tanal(C)!-bromo-2-meth&lb%tanal(D)!-bromo-2-meth&lpentanal
Answer: (D)
:. The correct se=%ence of steps in7ol7ed in the mechanism of
Canni55aro(s reaction is . [Karnataka CET 2010](A)n%cleophilic attac6, transfer of and transfer of B
Answer: (A)
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(B)electrophilic attac6 b& ", transfer of Band transfer of
(C)transfer of , transfer of Band n%cleophilic attac6
(D)transfer of B, n%cleophilic attac6 and transfer of
. The compo%nd obtained when acetaldeh&de reacts with dil%tea=%eo%s sodi%m h&droxide exhibits[Karnataka CET 2010](A)geometrical isomerism(B)optical isomerism(C)both optical and geometrical isomerism(D)neither optical nor geometrical isomerism
Answer: (B)
1D. *en5aldeh&de and acetone can be best disting%ished%sing[Karnataka CET 2010](A)h&dra5ine(B)Tollen(s reagent(C)sodi%m h&droxide sol%tion(D)2, 3-0E9
Answer: (B)
11. +n the following se=%ence of reactions,the al6ene aFords thecompo%nd (*( [AIEEE 2008]
C!C G CC! ,The compo%nd * is(A)C!C"C!(B)C!C2C"(C)C!C"(D)C!C2C"C!
Answer: (C)
12. The compo%nd formed as a res%lt of oxidation of eth&l ben5eneb& HMn"3is[AIEEE 2007](A)*en5&l alcohol(B)*en5oic acid(C)cetophenone(D)*en5ophenone
Answer: (B)
Which of the following is correct?[CBSE AIPMT 2001]
(A)n& aldeh&de gi7es secondar& alcohol on red%ction(B)4eaction of 7egetable oil with 2I"3gi7es gl&cerin(C)C2$", iodine with Ea" gi7es iodoform(D)I%crose on reaction with EaCl gi7e in7ert s%gar
Answer: (C)
mixt%re of ben5aldeh&de and formaldeh&de on heating witha=%eo%s Ea" sol%tion gi7es [IIT JEE 2001](A)ben5&l alcohol and sodi%m formate(B)sodi%m ben5oate and meth&l alcohol(C)sodi%m ben5oate and sodi%m formate(D)ben5&l alcohol and meth&l alcohol
Answer: (A)
Which of the following has most acidic h&drogen?[IIT JEE2000]
(A)!-exanone(B)2, 3-exanedione(C)2, $-exanedione(D)2, !-exanedione
Answer: (B)
Aldehydes, Ketones and Carboxylic Acids MCQs Questions: Paper ! "
Sr.No.
Questions Ansers
cetone is treated with excess of ethanol in the presence ofh&drochloric acid. The prod%ct obtained is' [CBSE AIPMT2012]
Answer: (B)
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(A)
(B)
(C)
(D)
Clemmensen red%ction of a 6etone is carried o%t in thepresence of which of the following?[CBSE AIPMT 2011]
(A)2and 9t as catal&st(B)Jl&col with H"(C)>n-g with Cl(D)Lil3
Answer: (C)
+dentif& the prod%ct in the reaction
? [DE!I PMT 2010](A) 9hC2C2C"(B) 9hC"C2C!(C) 9hC2C"C!(D) 9hC"C"Me
Answer: (B)
Which of the following statements is not correct" [DE!I
PMT 2010](A) ldeh&des and 6etones %ndergo n%cleophilic addition(B) ldeh&des and 6etones %ndergo electrophilic s%bstit%tion(C) ldeh&des and 6etones contain polar carbon&l gro%p(D) Lower members of aldeh&des and 6etones are sol%ble inwater d%e to h&drogen bonding
Answer: (*)
Compo%nd (( %ndergoes formation of c&anoh&drins which onh&drol&sis gi7es lactic acid C!C"C""/. Therefore,compo%nd (( is [DE!I PMT 2010](A) formaldeh&de(B) acetaldeh&de(C) acetone(D) ben5aldeh&de
Answer: (B)
Trichloroacetaldeh&de, CCl!C" reacts with chloroben5ene inthe presence of s%lph%ric acid and prod%ces [CBSE AIPMT200#]
(A)
(B)
Answer: (A)
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(C)
(D)
The compo%nd which forms acetaldeh&de when heated withdil%te Ea" is [Karnataka CET 200#]
(A) 1 chloro ethane(B) 1, 1 dichloro ethane(C) 1, 2 dichloro ethane(D) 1, 1, 1 trichloro ethane
Answer: (B)
n organic compo%nd ; is oxidi5ed b& %sing acidiKed H2Cr2"@.The prod%ct obtained reacts with phen&l h&dra5ine b%t doesnot answer sil7er mirror test. The possible str%ct%re of ;is [Karnataka CET 200#](A) C!/2C"(B) C!C"(C) C!C2"
(D)
Answer: (A)
)or ma6ing distinction between 2-pentanone and !-pentanone the reagent to be emplo&ed is [$B JEE 200#](A) H2Cr2"@2I"3(B) >n-gCl(C) Ie"2(D) +odineEa"
Answer: (D)
+n which of the following reactions new carbon-carbon bondis not formed [$B JEE 200#](A) Canni55aro reaction(B) W%rth reaction(C) ldol condensation
(D) )riedel-Crafts reaction
Answer: (A)
strong base can abstract an -h&drogen from [CBSEAIPMT 2008](A) mine(B) l6ane(C) l6ene(D) Hetone
Answer: (D)
4ed%ction of aldeh&des and 6etones into h&drocarbons %sing5inc amalgam and conc.Cl is called [CBSE AIPMT 2007](A) Cope red%ction(B) 0ow red%ction(C) WolF-Hishner red%ction
(D) Clemmensen red%ction
Answer: (D)
The prod%ct formed in ldol condensation is [CBSE AIPMT2007]
Answer: (A)
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(A) beta-h&drox& aldeh&de or a beta-h&drox& 6etone.(B) an alpha-h&drox& aldeh&de or 6etone.(C) an alpha, beta %nsat%rated ester(D) a beta-h&drox& acid
The incorrect +A9C name is [CBSE AIPMT 2001]
(A)
(B)
(C)
(D)
Answer: (A)
The appropriate reagent for the transformation' [IIT JEE2000]
(A) >n g/, Cl(B) E2E2, "
(C) 2, Ei(D) Ea*3
Answer: (B)