Topic: Aldehydes, Ketones and Carboxylic Acids, Test No.: 01, Total MCQs: 15
Question 1 |
Which of the following acids does not exhibit optical isomerism? [CBSE AIPMT 2012]
Lactic acid | |
Tartaric acid | |
Maleic acid | |
α-amino acids |
Question 2 |
CH3CHO and C6H5CH2CHO can be distinguished chemically by: [CBSE AIPMT 2012]
Tollen's reagent test | |
Fehling solution test | |
Benedict test | |
Iodoform test |
Question 3 |
The correct order of decreasing acid strength of trichloroacetic acid (A), trifluoroacetic acid (B), acetic acid (C) and formic acid (D) is [CBSE AIPMT 2012]
A > B > C > D | |
A > C > B > D | |
B > A > D > C | |
B > D > C > A |
Question 4 |
Which of the following reactions will not result in the formation of carbon-carbon bond? [CBSE AIPMT 2010]
Reimer-Tieman reaction | |
Friedel Crafts acylation | |
Wurtz reaction | |
Cannizzaro reaction |
Question 5 |
One mole of a symmetrical alkane on ozonolysis gives two moles of an aldehyde having molecular mass of 44u. The alkene is: [AIEEE 2010]
Ethene | |
Propene | |
1-butene | |
2-butene |
Question 6 |
One mole of an organic compound 'A' with the formula C3H8O reacts completely with two moles of HI to form X and Y. When 'Y' is boiled with aqueous alkali it forms Z. Z answers the iodoform test. The compound 'A' is ______. [Karnataka CET 2010]
Propan-1-ol | |
Propan-2-ol | |
ethoxyethane | |
methoxyethane |
Question 7 |
The IUPAC name
of 
is ______. [Karnataka
CET 2010]
2-methyl-3-bromohexanal | |
2-methyl-3-bromobutanal | |
3-bromo-2-methylbutanal | |
3-bromo-2-methylpentanal |
Question 8 |
The correct sequence of steps involved in the mechanism of Cannizzaro's reaction is _____. [Karnataka CET 2010]
nucleophilic attack, transfer of H- and transfer of H+ | |
electrophilic attack by OH-, transfer of H+ and transfer of H- | |
transfer of H-, transfer of H+ and nucleophilic attack | |
transfer of H+, nucleophilic attack and transfer of H- |
Question 9 |
The compound obtained when acetaldehyde reacts with dilute aqueous sodium hydroxide exhibits [Karnataka CET 2010]
geometrical isomerism | |
optical isomerism | |
both optical and geometrical isomerism | |
neither optical nor geometrical isomerism |
Question 10 |
Benzaldehyde and acetone can be best distinguished using [Karnataka CET 2010]
hydrazine | |
Tollen's reagent | |
sodium hydroxide solution | |
2, 4-DNP |
Question 11 |
In the following sequence of reactions, the alkene affords the compound 'B' [AIEEE 2008]
CH3CH
= CHCH3 
,
The compound B is
CH3COCH3 | |
CH3CH2CHO | |
CH3CHO | |
CH3CH2COCH3 |
Question 12 |
The compound formed as a result of oxidation of ethyl benzene by KMnO4 is [AIEEE 2007]
Benzyl alcohol | |
Benzoic acid | |
Acetophenone | |
Benzophenone |
Question 13 |
Which of the following is correct? [CBSE AIPMT 2001]
Any aldehyde gives secondary alcohol on reduction | |
Reaction of vegetable oil with H2SO4 gives glycerin | |
C2H5OH, iodine with NaOH gives iodoform | |
Sucrose on reaction with NaCl give invert sugar |
Question 14 |
A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives [IIT JEE 2001]
benzyl alcohol and sodium formate | |
sodium benzoate and methyl alcohol | |
sodium benzoate and sodium formate | |
benzyl alcohol and methyl alcohol |
Question 15 |
Which of the following has most acidic hydrogen? [IIT JEE 2000]
3-Hexanone | |
2, 4-Hexanedione | |
2, 5-Hexanedione | |
2, 3-Hexanedione |
these ques are toooooooooooooooo hard !!!!!!!!!!!!!!!!
nice questions!!!!
Pls explain 9
first step in aldol condensation, it forms ß hydroxy aldehyde which has one chiral centre hence optical isomerism, only after condensation it forms but-2-en-1-al whicjh shows geometrical iso, but here the question asks us about the first step.
Could u please explain 8
5th
in first step nucleophile oh- attack the carbonyl carbon of the given aldehyde and an anion forms. in 2nd step, the anion send a hydride ion on the other carbonyl carbon.. and in the final step a proton exchange.