IISER Chemistry - Organic Chemistry Based on Functional Group - II
Exam Duration: 45 Mins Total Questions : 30
Which one of the following acids reduces Tollens' reagent?
- (a)
acetic acid
- (b)
formic acid
- (c)
carbonic acid
- (d)
hydrochloric acid
Which one of the following reagents can bring about RCHO -> RCH2OH transformation?
- (a)
Sn and HCl
- (b)
H2 and Pt
- (c)
LiAiH4 and ether
- (d)
Na and alcohol
Schiff's reagent gives pink colour with
- (a)
acetone
- (b)
acetic acid
- (c)
ethyl acetate
- (d)
acetaldehyde
Cannizzaro reaction occurs with
- (a)
CH3CH2OH
- (b)
C6H5CHO
- (c)
CH3CHO
- (d)
CH3COCH3
When HCHO is treated with C6H5CHO in presence of NaOH,the products are
- (a)
CH3OH and HCOONa
- (b)
C6H5CH2OH and C6H5COONa
- (c)
CH3OH and C6H5COONa
- (d)
HCOONa and C6H5CH2OH
Ketone on reduction with Zn-Hg/HCl gives
- (a)
primary alcohol
- (b)
secondary alcohol
- (c)
tertiary alcohol
- (d)
hydrocarbon
The IUPAC name for picric acid is
- (a)
1,3,5 trinitro-6,hydroxy benzene
- (b)
2,4,6 trinitro-1, hydroxy benzene
- (c)
2,4,5 trinitro phenol
- (d)
2,4,6 trinitro-1,hydroxy hexane
When calicum acetae is dry distiled, the compound obtained is
- (a)
acetaldehyde
- (b)
acetone
- (c)
acetic acid
- (d)
formaldehyde
When benzoic acid is sulphonated, we obtain
- (a)
a mixture of o and p-sulphobenzoic
- (b)
o-sulphobenzoic acid
- (c)
p-sulphobenzoic acid
- (d)
m-sulphobenzoic acid
Smell of bittr almond is given by
- (a)
phenol
- (b)
benzene
- (c)
benzaldehyde
- (d)
benzoic acid
The chemical change in the reaction CH3COCH3+HCHO -> CH3COCH2CH2OH is an example of
- (a)
disproportionation
- (b)
oxidation reduction
- (c)
crossed aldol condersation
- (d)
reductive alkylation
\({ CH }_{ 3 }{ CH }_{ 2 }{ COOH }\overset {{ Cl }_{ 2 } }{ \underset { red\ P }{ \longrightarrow } A } \overset { alc.KOH }{ \longrightarrow } { B }\) What is B?
- (a)
CH3CH2COCL
- (b)
CH3CH2CHO
- (c)
CH2=CHCOOH
- (d)
ClCH2CH2COOH
Carbon monoxide gas was passed through strong sodium hydroxide solution under high pressure at 473 k.The product formed on acidification:
- (a)
formic acid
- (b)
acetic acid
- (c)
methanol
- (d)
carbonic acid
An organic compound X having molecular formula C3H6O2.To which of the following class compound X belongs?
- (a)
sec.alcohol
- (b)
primary alcohol
- (c)
tert. alcohol
- (d)
aldehyde
Which one of the following is a general method for testing reducing or non-reducing sacchardies?
- (a)
Molisch's test
- (b)
Barford test
- (c)
Benedict solution test
- (d)
Bial's test
Cannizzaro's reaction is given only with
- (a)
Ketones
- (b)
carboxylic acid
- (c)
aldehydes having \(\alpha \)-hydrogen
- (d)
aldehydes having no \(\alpha \)-hydrogen
Which of the following compound is most reactive towards nucleophilic addition reactions?
- (a)
- (b)
- (c)
- (d)
The enol form of acetone when treated with D2O produces
- (a)
- (b)
- (c)
- (d)
Although carboxylic acids are unreactive towards alcohols but react in the presence of small amount of conc. H2SO4 to form ester
\(RCOOH + R'OH \overset {H^+ }{ \rightleftharpoons } RCOOR'+H_2O\)
Consider the following statements,
I. The above reaction is called Fischer esterification reaction.
II. The reaction of RCOCl and R'OH for the production of ester (RCOOR') is irreversible and more feasible than the esterification of RCOOH.
III. The equilibrium is shifted towards right hand side when is removed by azeotropic distillation with benzene.
IV. If the above reaction is carried out in the presence of excess of R'OH, the equilibrium shift towards right hand side.
Which of the following statements are correct?
- (a)
I and III
- (b)
I, II and III
- (c)
I, III and IV
- (d)
I, II, III and IV
The most acidic H-atom in the following ester is
\({ ^{ 1 }{ CH }_{ 3 } }^{ 2 }{ CH }_{ 2 }{ - }\overset { \overset { O }{ || } }{ C } { - }^{ 3 }{ CH }_{ 2 }{ - }\overset { \overset { O }{ || } }{ C } { - }{ O }{ - }{ ^{ 4 }{ CH }_{ 2 } }^{ 5 }{ CH }_{ 3 }\)
- (a)
1
- (b)
2
- (c)
3
- (d)
4
Identify the end product in the following sequence of reactions
\(CaC_2 \overset { H_2O }{ \rightarrow } A\overset { Hg^{2+}H_2SO_4 }{ \rightarrow } B\overset { [O]}{ \rightarrow } C\overset { Ca(OH)_2}{ \rightarrow } D\overset { \Delta }{ \rightarrow } E\)
- (a)
acetaldehyde
- (b)
formaldehyde
- (c)
acetone
- (d)
acetic acid
In Rosenmund reduction,
\(RCOCl + H_2 \overset {Pd/BaSO_4 }{ \rightarrow } RCHO + HCl\)
BaSO4 here,
- (a)
promotes catalytic activity of Pd
- (b)
removes HCl formed in the reaction
- (c)
deactivates palladium
- (d)
activates palladium
Identify X in the following reaction, \(CH_3COOH\overset {Br_2/P }{ \rightarrow } Y\xrightarrow [ (ii)H_3O^+ ]{ KCN} X\)
- (a)
glycolic acid
- (b)
succinic acid
- (c)
malonic acid
- (d)
\(\alpha\)-hydroxy propionic acid
The compound A with molecular formula C3H8O when treated with acidified potassium dichromate forms a compound B of molecular formula C3H6 O. The compound B gives a shining silver mirror when warmed with ammoniacal silver nitrate. Aqueous solution of NH2CONHNH2 .HCl and sodium acetate when added to B, a product C is obtained. Identify C
- (a)
CH3CH2CH=NNHCONH2
- (b)
CH2CH2CH=NCONHNH2
- (c)
(CH3)2C=NCONHNH2
- (d)
(CH3)2C=NNHCONH2
Silver mirror test is given by which one of the following compounds?
- (a)
Acetaldehyde
- (b)
Acetone
- (c)
Formaldehyde
- (d)
Benzophenone
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
- (a)
HCHO
- (b)
CH3COCH3
- (c)
CH3COOH
- (d)
CH3OH
Which of the following on heating with aqueous KOH, produces acetaldehyde?
- (a)
CH3COCl
- (b)
CH3CH2Cl
- (c)
CH2ClCH2Cl
- (d)
CH3CHCl2
The compound formed as a result of oxidation of ethyl benzene by KMnO4 is
- (a)
benzophenone
- (b)
acetophenone
- (c)
benzoic acid
- (d)
benzyl alcohol
The increasing order of the rate of HCN addition to compounds a-d is
(i) HCHO (ii) CH3COCH3
(iii) PhCOCH3 (iv) PhCOPh
- (a)
(i) < (ii) < (iii) < (iv)
- (b)
(iv) < (ii) < (iii) < (i)
- (c)
(iv) < (iii) < (ii) < (i)
- (d)
(iii) < (iv) < (ii) < (i)
Among the following acids which has the lowest pKa value?
- (a)
CH3COOH
- (b)
HCOOH
- (c)
(CH3)2CH-COOH
- (d)
CH3CH2COH
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