Good conductor of electricity and heat is
  • Anthracite coke
  • Diamond
  • Graphite
  • Charcoal
In which of the following allotropes of carbon, percentage of carbon is maximum?
  • Wood charcoal
  • Coconut charcoal
  • Graphite
  • None of these
Organic compound must contain an element
  • oxygen
  • carbon
  • hydrogen
  • nitrogen
Alkene gives which of the following reactions?
  • Addition reaction
  • Substitution reaction
  • Both (a) and (b)
  • None of these
Single bond length between carbon-carbon is
  • 1.34 Å
  • 1.20 Å
  • 1.54 Å
  • none of these
Valency of carbon is
  • 1
  • 2
  • 3
  • 4
Criteria for purity of organic solid is
  • boiling point
  • melting point
  • specific gravity
  • none of these
Hybridisation of carbon in ethane is
  • sp
  • ps
  • (i) and (ii)
  • None of the above
Number of π bonds in ethyne is
  • 1
  • 2
  • 3
  • 4
The compound having general formula CH is
  • Alkene
  • Alkyne
  • Alkane
  • none of these
The negative part of the addendum (the molecule to be added) adds on the carbon atom of the double bond containing the least number of hydrogen atoms. This rule is known as
  • Saytzeffs rule
  • Peroxide rule
  • Markovnikov’s rule
  • van’t hoff rule
Which of the following compounds can yield only one monochlorinafed product upon free radical chlorination?
  • 2, 2-Dimethylpropane
  • 2-Methylpropane
  • 2-Methylbutane
  • n-Butane
The reaction
  • nucleophilic addition
  • free radical addition
  • electrophilic addition
  • electrophilic substitution
Bromination of methane in presence of sunlight is a
  • nucleophilic substitution
  • free radical substitution
  • electrophilic substitution
  • nucleophilic addition
The reaction of toluene with chlorine in presence of FeCl
  • amixture of o-and p-chlorotoluene
  • benzyl chloride
  • m-chlorotuluene
  • benzoyl chloride
Alkyl halides are immiscible in water though they are polar because
  • they react with water to give alcohols
  • they cannot form hydrogen bonds with water
  • C -X bond cannot be broken easily
  • they are stable compounds and are not reactive
Which of the following compounds will have highest melting point?
  • Chlorobenzene
  • o-Dichlorobenzene
  • m-Dichlorobenzene
  • p-Dichlorobenzene
Ethyl alcohol is obtained when ethyl chloride is boiled with
  • alcoholic KOH
  • aqueous KOH
  • water
  • aqueous KMnO
Butane nitrile can be prepard by heating.
  • propyl alcohol with KCN
  • butyl chloride with KCN
  • butyl alcohol with KCN
  • propyl chloride with KCN
Which of the following reactions will give the major and minor products?
  • is major product and (b) is minor product
  • (a) is minor product and is major product
  • Both (a) and (b) are major products
  • Only (b) is formed and (a) is not formed
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