NEET Chemistry Chapter Wise Mock Test – Aldehydes, Ketones and Carboxylic Acids
A compound does not react with 2,4-dinitrophenyl hydrazine, compound is
When ethanal reacts with CH3MgBr and C2H5OH/dry HCl, the product formed are
(a) methyl alcohol and 2-propanol
(b) ethane and hemiacetal
(c) 2-propanol and acetal
(d) propane and methyl acetate
Arrange the following compounds in decreasing order of their boiling points.
CH3CHO, CH3CH2OH, CH3OCH3, CH3CH2CH3
(a) CH3CH2CH3 < CH3OCH3 < CH3CHO < CH3CH2OH
(b) CH3CH2CH3 < CH3CHO < CH3OCH3< CH3CH2OH
(c) CH3CH2CH3 > CH3CHO > CH3OCH3> CH3CH2OH
(d) CH3CH2OH > CH3CHO > CH3OCH3 > CH3CH2CH3
Which of the following compounds on heating with aqueous KOH, produces acetaldehyde?
Which of the following give an explosive RDX on nitration?
The reagent used for the separation of acetaldehyde from acetophenone is
An aromatic compound ‘X’ with molecular formula C9H10O gives the following chemical tests
(i) It forms 2,4-DNP derivative.
(ii) It reduces Tollen’s reagent.
(iii) It undergoes Cannizzaro reaction.
(iv) On vigorous oxidation, 1,2-benzenedicarboxylic acid is obtained.
Compound X is
Self condensation of acetaldehyde in the presence of dilute alkalies gives
(a) an acetal
(b) an aldol
Which of the following compounds will not undergo aldol condensation?
(b) 2-methyl pentanal
(d) 1-phenyl propanone
In Cannizaro reaction given below,
the slowest step is
(a) the attack of OH-
(b) the transfer of hydride to the carbonyl group
(c) the abstraction of proton from the carboxylic group
(d) the deprotonation of PhCH2OH
Which one of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?
(b) Benzoic acid
(a) phenol and benzoic acid in the presence of NaOH
(b) phenol and benzoyl chloride in the presence of pyridine
(c) phenol and benzoyl chloride in the presence of ZnCl2
(d) phenol and benzaldehyde in the presence of palladium
Ketones react with Mg-Hg over water gives
(d) None of these
An organic compound X on treatment with acidified K2Cr2O7 gives compound Y which reacts with I2 and sodium carbonate to form triiodomethane. The compound X can be
Which of the following compounds with molecular formula C5H10 yields acetone on ozonolysis?
(d) 2-methyl-1 -butene
Which is not true about acetophenone?
(a) On oxidation with alkaline KMnO4 followed by hydrolysis gives benzoic acid
(b) Reacts with I2/NaOH to form iodoform
(c) Reacts with Tollen’s reagent to form silver mirror
(d) Reacts to form 2,4-dinitrophenyl hydrazine
A carbonyl compound reacts with hydrogen cyanide to form cyanohydrin which on hydrolysis forms a racemic mixture of α-hydroxy acid. The carbonyl compound is
(c) diethyl ketone
A liquid was mixed with ethanol and a drop of concentrated H2SO4 was added. A compound with a fruity smell was formed. The liquid was
By combining the two calcium salts of carboxylic acids, we are preparing 2-butanone. Find the correct pair from the following
(a) Calcium formate+Calcium propanoate
(b) Calcium acetate+Calcium propanoate
(c) Calcium acetate+Calcium acetate
(d) Calcium formate+Calcium acetate
Which of the following represents the correct order of the acidity in the given compounds?
(a) CH3COOH > BrCH2COOH > ClCH2COOH> FCH2COOH
(b) FCH2COOH > CH3COOH > BrCH2COOH > ClCH2COOH
(c) BrCH2COOH > ClCH2COOH > FCH2COOH> CH3COOH
(d) FCH2COOH > ClCH2COOH > BrCH2COOH > CH3COOH
Consider the acidity of the following carboxylic acids.
IV. m – NO2C6H4COOH
Which of the following order is correct?
(a) I > II > III > IV
(b) II > IV > III > I
(c) II > IV > I > III
(d) II > III > IV > I
In the following reaction,
The major amounts of X and Y are
(b) RCHBrCOOH; RCH(NH2)COOH
(c) RCH2COBr; RCH2COONH4
(d) RCHBrCOOH; RCH2CONH2
The property which distinguishes formic acid from acetic acid is
(a) Only ammonium salt of formic acid on heating gives amide
(b) When heated with alcohol/H2SO4, only acetic acid forms ester
(c) Only acetic acid forms salts with alkali
(d) Only formic acid reduces Fehling’s solution
The product of acid hydrolysis of P and Q can be 0 distinguished by
(a) Lucas reagent
(b) 2, 4-DNP
(c) Fehling’s solution
Hydrolysis of an ester gives a carboxylic acid which on Kolbe’s electrolysis yield ethane. The ester is
(a) methyl methanoate
(b) methyl ethanoate
(c) methyl methanoate
(d) None of the above
In the following reaction,
X and Y respectively, are
(a) HN3 and CH3NH2
(b) NH3 andCH3CONH2
(c) NH3 and CH3NH2
(d) NH3 and CH3CONH2
Two moles of acetic acid are heated with P2O5. The product formed is
(a) 2 moles of ethanol
(b) 2 moles of methyl cyanide
(c) acetic anhydride
(d) formic anhydride
Vinegar obtained from sugarcane has
Direction (Q.NOs.36-37): In the following questions more than one of the answers given may be correct. Select the correct answers and mark it according to the codes.
(a) 1,2 and 3 are correct
(b) 1 and 2 are correct
(c) 2 and 4 are correct
(d) 1 and 3 are correct
The acids which do not contain a —COOH group are
1. picric acid
2. lactic acid ,
3. carbolic acid
4. propanoic acid
Following conversion can be carried out by using
1. KMnO4 in alcohol
2. NaClO in a buffer
3. Ag2O/NaOH, HCl
4. FeCl3 in a buffer
(a) Cyclopentanoyl anion
(b) Cyclopentanoyl cation .
(c) Cyclopentanoyl radical
(d) Cyclopentanoyl biradical
An organic compound ‘X’ having molecular formula C5H10O yields phenyl hydrazone and gives negative response to the iodoform test and Tollen’s test. It produces n-pentane on reduction. ‘X’ could be
(d) n-amyl alcohol
Direction (Q.Nos.41-44): Each of these questions contains two statements : Assertion and Reason. Each of, these questions also has four alternative choices, only one of which is the correct answer. You have to select one of the codes (a),(b),(c) and (d) given below.
(a) Assertion is true,Reason is true; Reason is the correct explanation for Assertion
(b) Assertion is true,Reason is true; Reason is not the correct explanation for Assertion
(c) Assertion is true,Reason is false
(d) Assertion is false,Reason is true
Assertion: Both o-hydroxy benzaldehyde and p-hydroxy benzaldehyde have same molecular weight and show H-bonding.
Reason: Melting point of p-hydroxy benzaldehyde is more.
Assertion: Isobutanal does not give iodoform test.
Reason: It does not have α-hydrogen.
Assertion: Aspirin can cause ulcer in the stomach.
Reason: The ester group in aspirin gets hydrolysed to acid group in the stomach where the pH is 2.
Assertion: The oxidation of ketone by perbenzoic acid gives esters.
Reason: Perbenzoic acid oxidises because of the release of nascent oxygen on dissociation.
The correct order of stability of the following tautomeric compounds,is
(a) III > II > I
(b) II > I > III
(c) II > III > I
(d) I > II > III
Reaction by which benzaldehyde cannot be prepared is
CH3CHO and C6H5CH2CHO can be distinguished chemically by
(a) Benedict’s test
(b) Iodoform test
(c) Tollen’s reagent test
(d) Fehling’s solution test
The correct order of decreasing acidic strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is
Acetone is treated with excess of ethanol in the presence of hydrochloric acid. The product obtained is
The product formed in the following reaction
In a set of reactions, m-bromobenzoic acid gave a product D. Identify the product D
Clemmensen reduction of a ketone is carried out in the presence of which of the following?
(a) Zn-Hg with HCl
(c) H2 and Pt as catalyst
(d) Glycol with KOH
The best reagent to convert pent-3-en-2-ol into pent-3-en-2-one is
(a) pyridinium chloro chromate
(b) chromic anhydride in glacial acetic acid
(c) acidic dichromate
(d) acidic permanganate
Which of the following reactions will not result in the formation of carbon-carbon bonds?
(a) Reimer-Tiemann reaction
(b) Cannizzaro reaction
(c) Wurtz reaction
(d) Friedel-Crafts acylation
Given, cyclohexanol (I), acetic acid (II) 2,4,6-trinitrophenol (III) and phenol (IV). In these, the order of decreasing acidic character will be
When ethanal is treated with Fehling’s solution, it gives a precipitate of
The major organic product formed in the following reaction
Which of the following aldehydes contains α-C atom but does not have any α-H atom?
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