Chemistry - Some Important Points and Important Questions 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 branched chain isomer of the hydrocarbon with molecular mass 72 give only one isomer of mono substituted alky1 halide?
- (a)
neopentane
- (b)
isohexane
- (c)
neohexane
- (d)
tertiany buty1 chloride
On treating phenol with PC15 the main product is
- (a)
chlorobenzene
- (b)
triphenyl phosphate
- (c)
hexachlorobenzane
- (d)
BHC
Which of the following compounds does not react with metalic sodium?
- (a)
CH3CH(OH)Ch3
- (b)
CH3-O-CH3
- (c)
CH3COOH
- (d)
C2H5OH
The regent used to convert ethanoic acid to ethanol is
- (a)
LiAlH4
- (b)
BH3
- (c)
PCl3
- (d)
K2Cr2O7/H+
Mercuric chloride reduced to mrecurous chloride by
- (a)
formic acid
- (b)
ammonia
- (c)
acetic acid
- (d)
benzaldehyde
which of the following is polyprotic acid
- (a)
salicylic acid
- (b)
oxalic acid
- (c)
glycollic acid
- (d)
lactic 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)
\(5\sigma \quad and\quad 7\pi \)
When glycerol is heated with KHSO4 or ZnCl2 or H2SO4 the product formed is
- (a)
formaldehyde
- (b)
acetaldehyde
- (c)
acrolein
- (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
2,4 dinitrophenyl hydrazine is called
- (a)
Tollens reagent
- (b)
Bayer's regent
- (c)
Brady's reagent
- (d)
Fehling's solution
Lacrymator or tear gas is
- (a)
C6H5COCL
- (b)
C6H5OC6H5
- (c)
C6H5COCH2CL
- (d)
C6H5COCH3
Among the given compounds, the most suscribable to nucleophilic attack at the carbonyl group is
- (a)
MeCOCL
- (b)
MeCHO
- (c)
MeCOOMe
- (d)
MeCOOCOMe
Lactic acid on heating with conc.H2SO4 gives
- (a)
acetic acid
- (b)
Propionic acid
- (c)
acrylic acid
- (d)
formic acid
The correct IUPAC name of \(HOOC-CH-COOH\\ \quad \quad \quad \quad\ \ |\\ \quad \quad \quad \quad COOH\)
- (a)
tricarboxymathane
- (b)
propane trioic-acid
- (c)
tributanoic acid
- (d)
2-carboxy propane dioic acid
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