Multiple Choice QuestionsThe IUPAC name of the following compound,[(CH3)2CH—CH2—CH=CH—CH=CH(C2H5)—CH3] is
2, 8-dimethyl-4, 6-decadiene
1, 1, 7, 7-tetramethyl-2, 5-octadiene
1, 5-diisopropyl-1, 4-hexadiene
3, 9-dimethyl-4, 6-decadiene
Chlorination of benzene in the presence of halogen carrier is an example of
aromatic nucleophilic substitution
aromatic electrophilic substitution
aromatic nucleophilic addition
aromatic electrophilic addition
Aryl halides doesn't undergo nucleophilic substitution reactions under ordinary conditions because of
1. approach of nucleophile is retarded
2. carbon carrying halogen atoms is sp3-hybridised
3. the substrate molecule is destabilised due to resonance
4. partial double bond character between carbon and halogen
2 and 4 only
1 and 4 only
2 and 3 only
2, 3 and 4 only
Which of the following undergoes reduction with hydrogen peroxide in alkaline medium?
Mn2+
FeO
PbS
HOCl
In Lassaigne's test for the detection of halogens, the sodium fusion extract is first boiled with concentrated nitric acid. This is
to remove silver halides
to decompose Na2S and NaCN, if present
to dissolve Ag2S
to dissolve AgCN, if formed
In Lassaigne's test for the detection of halogens, the sodium fusion extract is first boiled with concentrated nitric acid. This is
to remove silver halides
to decompose Na2S and NaCN, if present
to dissolve Ag2S
to dissolve AgCN, if formed
According to Ellingham diagram, the oxidation reaction of carbon to carbon monoxide may be used to reduce which one of the following oxides at the lowest temperature?
Al2O3
Cu2O
MgO
ZnO
Halogens exist in -1,+ 1, + 3, + 5 and 47 oxidation states. The halogen that exists only in -1 state is
F
Cl
Br
I
A.
F
Fluorine atom has no d-orbitals in its valence shell, therefore cannot expand its octet and thus, does not exhibit variable oxidation states. Being the most electronegative, it exhibits only -1 oxidation state.
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