IISER Chemistry - 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
On treating phenol with PC15 the main product is
- (a)
chlorobenzene
- (b)
triphenyl phosphate
- (c)
hexachlorobenzane
- (d)
BHC
The regent used to convert ethanoic acid to ethanol is
- (a)
LiAlH4
- (b)
BH3
- (c)
PCl3
- (d)
K2Cr2O7/H+
The acid which does not from from anhydride when treated with P4O10 is
- (a)
formic acid
- (b)
acetic acid
- (c)
propanoic acid
- (d)
benzoic acid
The compound with mol. mass 180 is acetylated with CH3COCL to get acetylated compound with mol mass 390.the number of amino groups present pre molecule of the compound is
- (a)
2
- (b)
5
- (c)
4
- (d)
6
The reaction \(2CH_{ 3 }COOC_{ 2 }H_{ 5 }\overset { \overset { \_ }{ O } C_{ 2 }H_{ 5 } }{ \longrightarrow } CH_{ 3 }COCH_{ 2 }COOC_{ 2 }H_{ 5 }\) is called
- (a)
perkin
- (b)
Tischenko
- (c)
Claisen
- (d)
schotten Bauman
\(CH_{ 3 }CH_{ 2 }COOH\overset { { Cl_{ 2 } }/{ Fe } }{ \longrightarrow } X\overset { alc }{ \underset { KOH }{ \longrightarrow } } Y\) Compound Y is
- (a)
Ch3CH2OH
- (b)
CH3CH2CN
- (c)
CH2=CHCOOH
- (d)
CH3CHClCOOH
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
\(R-N\equiv C+HgO\longrightarrow A+Hg_{ 2 }O;A\quad \)is
- (a)
\(RHN_{ 2 }\)
- (b)
\(RCONH_{ 2 }\)
- (c)
\(R-NCO\)
- (d)
\(RCOOH\)
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 Fisher-Spier easterification reaction, the order of reactivity of acids followthe sequence
- (a)
\(HCOOH>CH_{ 3 }COOH>\left( CH_{ 3 } \right) _{ 3 }COOH>\left( CH_{ 3 } \right) _{ 2 }COOH\)
- (b)
\(\left( CH_{ 3 } \right) _{ 3 }COOH>\left( CH_{ 3 } \right) _{ 2 }COOH>CH_{ 3 }COOH>HCOOH\)
- (c)
\(CH_{ 3 }COOH>\left( CH_{ 3 } \right) _{ 3 }COOH>(CH_{ 3 })_{ 2 }COOH>HCOOH\)
- (d)
None of these
Anisole can be prepared byheating
- (a)
C6H5Br and CH3ONa
- (b)
C6H5ONa and CH3Br
- (c)
C6H5ONa and C2H5Br
- (d)
None of these
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
2,4 dinitrophenyl hydrazine is called
- (a)
Tollens reagent
- (b)
Bayer's regent
- (c)
Brady's reagent
- (d)
Fehling's solution
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
A compound molecular formula C6H12O6 on acetylation with acetic anhydride and pyrdine gives a compound of molecular formula C12H22O11. How many hydroxyl groups are present in the compound?
- (a)
Three
- (b)
four
- (c)
five
- (d)
six
Lacrymator or tear gas is
- (a)
C6H5COCL
- (b)
C6H5OC6H5
- (c)
C6H5COCH2CL
- (d)
C6H5COCH3
Lactic acid on heating with conc.H2SO4 gives
- (a)
acetic acid
- (b)
Propionic acid
- (c)
acrylic acid
- (d)
formic acid
The Major product of nitration of benzoic acid is
- (a)
3-nitrobenzoic acid
- (b)
4-nitrobenzoic acid
- (c)
2-nitrobenzoic acid
- (d)
2,4-dinitrobenzoic 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
Which one of the following will not show geometrical isomerism?
- (a)
\(C{ H }_{ 3\quad \quad \quad \quad }\quad H\\ \quad \quad \quad \diagdown \quad \diagup \\ \quad \quad \quad \quad C\\ \quad \quad \quad \diagup \quad \diagdown \\ \quad Cl\quad \quad \quad CH=CHC{ H }_{ 3 }\)
- (b)
\(C{ H }_{ 2 }Cl_{ \quad \quad \quad }\quad \quad CH=C{ H }_{ 2 }\\ \quad \quad \quad \quad \quad \diagdown \quad \diagup \\ \quad \quad \quad \quad \quad \quad C\\ \quad \quad \quad \quad \quad \diagup \quad \diagdown \\ \quad \quad \quad H\quad \quad \quad C{ H }_{ 3 }\)
- (c)
\(\quad\quad\quad\quad\quad C{ H }_{ 2 }=CH\quad \quad \quad C{ H }_{ 2 }Cl\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagdown \quad \diagup \\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad C\\ \quad \quad \quad \quad \quad \quad \quad \quad \quad \quad \diagup \quad \diagdown \\ \quad \quad \quad \quad \quad \quad \quad \quad \quad H\quad \quad \quad C{ H }=CHCl\)
- (d)
\(\quad C{ H }_{ 3 }CH\quad =\quad CHC{ H }_{ 2 }C{ H }_{ 3 }\)
C6H6 \(\overset { [0] }{ \underset { { V }_{ 2 }{ O }_{ 5 } }{ \longrightarrow } } \) X . Here X is
- (a)
maleic anhydride
- (b)
acetic acid
- (c)
propanoic acid
- (d)
succinic acid
RCH2CCl2 R \(\overset { Reagent }{ \longrightarrow } \) RC \(\equiv \) CR .The reagent used is
- (a)
Na
- (b)
HCl / H2O
- (c)
KOH in C2H5OH
- (d)
Zn / alcohol
Which one of the following reagents would not yield alkane?
- (a)
\({ C }_{ 2 }{ H }_{ 5 }OH\quad \overset { HI/Red\ P }{ \underset { { 150 }^{ 0 }C }{\longrightarrow } } \)
- (b)
refluxing butanoic with Zn/Hg-HCl
- (c)
hydrolysis of ethyne
- (d)
electrolysis of sodium proponate solution
C2H5Br \(\overset { AgCN }{ \longrightarrow } \quad X\quad \overset { Reduction }{ \underset { Zn/Hg-HCl }{ \longrightarrow } } \quad Y\) , Y is
- (a)
n-propylamine
- (b)
ethylamine
- (c)
isopropylamine
- (d)
ethylmethylamine
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
Diethyl ether , in the presence of light and excess of chlorine gives
- (a)
\(CC{ l }_{ 3 }C{ l }_{ 2 }-O-C{ l }_{ 2 }C{ l }_{ 3 }\)
- (b)
\(\quad\quad\quad\quad Cl\quad \quad \quad\quad \quad Cl \\ \quad \quad \quad \quad \quad |\quad \quad \quad \quad \quad |\\ C{ H }_{ 3 }-CH-O-CH-C{ H }_{ 3 }\)
- (c)
\({ CH }_{ 3 }{ CCl }_{ 2 }-O-CC{ l }_{ 2 }-{ CH }_{ 3 }\)
- (d)
NONE OF THE ABOVE
Which is not true for C=O bond and C=C bond?
- (a)
Both are made up of one \( \delta \) bond and one \(\pi \)-bond
- (b)
Both are planar in nature
- (c)
Both use SP2 hybrid of the C atom for their formation
- (d)
Carbonyl compounds undergo electrophilic addition reaction whereas compounds containing ethylenic double bonds undergo nucleophilic addition reaction
Iodoform can be prepared from all except
- (a)
isopropyl alcohol
- (b)
3-methyl 2-butanone
- (c)
iso-butyl alcohol
- (d)
ethyl methyl ketone