For the given reaction , the major products A and B respectively are :
A
1-chloroporpane and Ethyne
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B
1,2-dichloroethane and ethane
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C
chloroethane and ethane
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D
None of the above
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Solution
The correct option is B 1,2-dichloroethane and ethane Addition of halogens: Halogens like bromine and chlorine add up to alkene to form vicinal dihalides CCl4 is the solvent.
Addition of dihydrogen :
Alkene+H2Ni/Pt/Pd−−−−−−→Alkane+heat
When nickel is used as a catalyst for addition of dihydrogen, then the reaction is known as Sabatier-Senderens reaction. So , B is ethane. The addition of hydrogen is called hydrogenation.The heat released in a hydrogenation reaction is called the heat of hydrogenation i.e. ΔH∘HOH