Haloalkanes And Haloarenes
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2 methylbutane on reacting with bromine in the presence of sunlight gives mainly
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1 – bromo -2 - methylbutane
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2 – bromo -2 - methylbutane
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2 – bromo -3 - methylbutane
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1 – bromo -3 – methylbutane
B.
2 – bromo -2 - methylbutane
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2–Hexyne gives trans–2–Hexene on treatment with
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Pt/H2
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Li/NH3
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Pd/BaSO4
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LiAlH4
B.
Li/NH3
3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product.The number of possible stereoisomers for the product is
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Six
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Two
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Zero
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Four
D.
Four
3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms 2 Bromo-3-methyl pentane.As the molecule is nonsymmetric therefore according to Anti Markownikov rule, due to 2 chiral centre 4 stereo isomers are possible. 
Alkyl halides react with dialkyl copper reagents to give
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alkenes
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alkyl copper halides
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alkanes
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alkenyl halides
C.
alkanes
R2CuLi + R'X → R-R' +R-Cu +LiX
An unknown alcohol is treated with the “Lucas reagent” to determine whether the alcohol is primary, secondary or tertiary. Which alcohol reacts fastest and by what mechanism
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Secondary alcohol by SN1
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Tertiary alcohol by SN1
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Secondary alcohol by SN2
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Tertiary alcohol by SN2
B.
Tertiary alcohol by SN1
Reaction proceeds through carbocation formation as 30 carbocation is highly stable, hence reaction proceeds through SN1 with 30 alcohol.
Sponsor Area
Mock Test Series
Mock Test Series