Some Important points and on organic chemistry
Exam Duration: 45 Mins Total Questions : 30
The substance which has been asaigned octane number of -45 is
- (a)
n -octane
- (b)
n -heptane
- (c)
n -nonane
- (d)
None
Which of the following compounds does not react with metalic sodium?
- (a)
CH3CH(OH)Ch3
- (b)
CH3-O-CH3
- (c)
CH3COOH
- (d)
C2H5OH
Which of the following will react with water?
- (a)
CHCL3
- (b)
CCL3CHO
- (c)
CCL4
- (d)
CLCH2-CH2-Cl
Compound 'A' C5H10O forms a phenyl hydrazone and gives a negative Tollen's reagent test and iodoform test. on reduction with Zn-Hg/HCl, compound 'A' is gives n-pentane. the compound 'A' is
- (a)
Primary alcohol
- (b)
aldehyde
- (c)
secondary alcohal
- (d)
ketone
\(CH_{ 3 }CH_{ 2 }COOH\overset { { Cl_{ 2 } }/{ Fe } }{ \longrightarrow } X\overset { alc }{ \underset { KOH }{ \longrightarrow } } Y\) Compound Y is
- (a)
Ch3CH2OH
- (b)
CH3CH2CN
- (c)
CH2=CHCOOH
- (d)
CH3CHClCOOH
The product formed on heating sucrose with conc.HNO3 is
- (a)
citric acid
- (b)
lactic acid
- (c)
sucrose nitrate
- (d)
oxalic acid
Alkyl isocyanides contain \(\sigma \) and \(\pi \) bounds
- (a)
\(9\sigma \quad and\quad 3\pi \)
- (b)
\(9\sigma \quad and\quad 9\pi \quad \)
- (c)
\(3\sigma \quad and\quad 4\pi \)
- (d)
\(5\sigma \quad and\quad 7\pi \)
In fischer-spier easterification reaction, the order of reactivity of the alcohols follows the sequence
- (a)
\(CH_{ 3 }OH>CH_{ 3 }CH_{ 2 }OH>\left( CH_{ 3 } \right) _{ 2 }>\left( CH_{ 3 } \right) _{ 3 }COH\)
- (b)
\((CH_{ 3 })_{ 3 }COH>(CH_{ 3 })_{ 2 }CHOH>CH_{ 3 }COH\)
- (c)
\(\left( CH_{ 3 } \right) _{ 2 }CHOH>(CH_{ 3 })_{ 3 }COH>CH_{ 3 }OH>CH_{ 3 }CH_{ 2 }OH\)
- (d)
None of these
Glycerol when heated with oxalic acid at 383 K gives
- (a)
formic acid
- (b)
acetic acid
- (c)
alyl alcohal
- (d)
None of these
Tertiary butyl methyl ether can be prepared by
- (a)
\(\quad \quad \quad CH_{ 3 }\\ \quad \quad \quad \quad |\\ CH_{ 3 }-C-Br\quad and\quad NaOCH_{ 3 }\\ \quad \quad \quad \quad |\\ \quad \quad \quad CH_{ 3 }\quad \)
- (b)
\(\quad \quad CH_{ 3 }\\ \quad \quad \quad \quad |\\ CH_{ 3 }-C-ONa\quad and\quad CH_{ 3 }Br\\ \quad \quad \quad \quad |\\ \quad \quad \quad CH_{ 3 }\quad \)
- (c)
\(\quad \quad \quad CH_{ 3 }\\ \quad \quad \quad \quad |\\ CH_{ 3 }-C-ONa\quad and\quad C_{ 2 }H_{ 5 }-Br\\ \quad \quad \quad \quad |\\ \quad \quad \quad CH_{ 3 }\quad \)
- (d)
None of the above
When ethyl alcohol reacts with diazomethane(CH2N2)in presence of HBF4, th eproduct formed would be
- (a)
Methyl ethyl ether and N2
- (b)
Diethyl ethre and N2
- (c)
methyl alcohol and methyl amine
- (d)
None of the above
By the Hydrolysis of 1,1,1-trichloro ethane the product formed is
- (a)
formic acid
- (b)
oxalic acid
- (c)
acitic acid
- (d)
None of the above
methyl magnesium bromide reacts with cyanogen chloride to give
- (a)
Acetonitrile
- (b)
ethane nitrile
- (c)
methyl cyanide
- (d)
All of the above
methyl isocyanide on acid hydrolysis gives
- (a)
acetic acid + NH3
- (b)
methyle amine and formic acid
- (c)
acetic acid and formic acid
- (d)
None is correct
Among the given compounds, the most suscribable to nucleophilic attack at the carbonyl group is
- (a)
MeCOCL
- (b)
MeCHO
- (c)
MeCOOMe
- (d)
MeCOOCOMe
Ethyne + X \(\underset { \longrightarrow }{ { Ba }^{ 2+ } } \)prop-2 ene -nitrile. Here X is
- (a)
bromine
- (b)
barium cyanide
- (c)
hydrogen bromide
- (d)
hydrogen cyanide
The chemical reaction (CH3)3CBr \(\overset { alc.KOH }{ \longrightarrow } \)(CH3)2CH=CH2 is an example of
- (a)
nucleophilic substitution
- (b)
electrophilic substitution
- (c)
free radical mechanism
- (d)
\(\beta \)-elimination
C6H6 \(\overset { conc.{ HNO }_{ 3 } }{ \underset { conc.{ H }_{ 2 }{ SO }_{ 4 }.363K }{ \longrightarrow } \quad } \) X \(\overset { { (NH }_{ 4 })_{ 2 }{ S }_{ x\quad } }{ \longrightarrow } Y\)
In the above sequence X and Y are
- (a)
nitrobenzene ,aniline
- (b)
m-dinitrobenzene , m -phenylene diamine
- (c)
m-dinitrobenzene and m-nitroaniline
- (d)
p-dinitrobenzene, p-nitroaniline
Phenol \(\overset { Zn }{ \underset { distillation }{ \longrightarrow } } \quad A\quad \overset { conc.HN{ O }_{ 3 } }{ \underset { conc.{ H }_{ 2 }{ SO }_{ 4 }.333K }{ \longrightarrow } } \quad B\quad \overset { Zn }{ \underset { NaOH }{ \longrightarrow } } \quad C\)
In the above reaction A , B and C are
- (a)
benzene,nitrobenzene,aniline
- (b)
benzene,m-dinitrobenzene,m-nitroaniline
- (c)
toulene ,m-nitrotoluene,m-toluidine
- (d)
benzene,nitrobenzene,hydrazobenzene
Iodoform can be prepared from all except
- (a)
isopropyl alcohol
- (b)
3-methyl 2-butanone
- (c)
iso-butyl alcohol
- (d)
ethyl methyl ketone