Organic Chemistry Based on Functional Group - II
Exam Duration: 45 Mins Total Questions : 30
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
Acetaldehyde when treated with caustic soda as a catalyst forms
- (a)
sodium acetate
- (b)
resin
- (c)
aldol
- (d)
acetone
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
Acetic acid on reacting with LiAlH4 gives
- (a)
ethyl alcohol
- (b)
ethane
- (c)
acetic acid
- (d)
acetaldehyde
Which one of the following is formalin?
- (a)
a 40% solution of formic acid
- (b)
a 40% solution of formaldehyde
- (c)
a 40% solution of methanol
- (d)
a 40% solution of methanaldehyde
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
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
Cannizzaro's reaction is given only with
- (a)
Ketones
- (b)
carboxylic acid
- (c)
aldehydes having \(\alpha \)-hydrogen
- (d)
aldehydes having no \(\alpha \)-hydrogen
Trioxane has the formula
\(\quad\quad\quad O\\ \quad \quad \diagup \quad \quad \diagdown \\ C{ H }_{ 2 }\quad \quad \quad C{ H }_{ 2 }\\ \quad |\quad \quad \quad \quad \quad |\\ O\quad\quad \quad \quad \quad O\\ \quad \diagdown \quad \quad \quad \diagup \\ \quad \quad C{ H }_{ 2 }\)
It is preapred for
- (a)
Vinyl alcohol
- (b)
dichloro methane
- (c)
methanol
- (d)
methanal
Which of the following compound is most reactive towards nucleophilic addition reactions?
- (a)
- (b)
- (c)
- (d)
The acids, HCOOH and CH3COOH are distinguished by
- (a)
reaction with Na metal
- (b)
reaction with NaOH
- (c)
reaction with Tollen's reagent
- (d)
reaction with Schiff's reagent
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
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
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
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
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)