Fill Ups & True False of Haloalkanes and Haloarenes , Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper

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JEE : Fill Ups & True False of Haloalkanes and Haloarenes , Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev

The document Fill Ups & True False of Haloalkanes and Haloarenes , Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev is a part of the JEE Course Class 12 Chemistry 35 Years JEE Mains &Advance Past yr Paper.
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Fill in the Blanks

1. The halogen which is most reactive in the halogenation of alkanes under sunlight is ................. . (chlorine, bromine, iodine) (1981 - 1 Mark)
Ans: 
chlorine

Solution : Chlorine; because rate of formation of CH3 (one of the propagating steps) is high when X is Cl.
CH4 + XCH3 + H – X

2

. The compound prepared by the action of magnesium on dry ethyl bromide in ether is known as ............. reagent. (1982 - 1 Mark)
Ans:  
Grignard

Solution : Grignard (RMgX)

 

3. The interaction of elemental sulphur with Grignard reagent gives .............. . (1991 - 1 Mark)
Ans: 
Thioalcohol

Solution : Thioalcohol

4. Vinyl chloride on reaction with dimethyl copper gives ............... . (1997 - 1 Mark)
Ans : 
polyvinyl chloride

Solution : polyvinyl chloride

 

True/False

1. m-Chlorobromobenzene is an isomer of m-bromochlorobenzene. (1985 - ½ Mark)
Ans: 
False

Solution : False : m-Chlorobromobenzene and m-bromochlorobenzene is one and the same compound.

 

2. The reaction of vinyl chloride with hydrogen iodide to give 1-chloro-1-iodoethane is an example of anti-Markovnikov’s rule.    (1989 - 2 Marks)

Ans:  False

Solution : 
Fill Ups & True False of Haloalkanes and Haloarenes , Past year Questions - JEE Advance, Class 12 JEE Notes | EduRev
This is an example of Markownikoff’s rule as I is added at the C with less number. of H-atoms.
NOTE : anti-Markonikov's rule is applicable only to HBr, but not to HI and HCl.

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