Question

What products are formed when zinc reacts with (i) vicinal C2H4Br2 ii) CH3CHBr – CH2Br. pls answer ​

Answer 1

Answer:

1. The question considers a chemical reaction when zinc reacts with excess sodium hydroxide it forms sodium zincate $N{a_2}Zn{O_2}$ and hydrogen gas. We know that zinc is a transition metal which shows moderate reactivity.
2. Zinc reacts with steam to give zinc oxide and hydrogen gas. So, we can say that when zinc reacts with steam the products formed are zinc oxide and hydrogen gas.
3. The reaction of zinc with sodium hydroxide is an example of single displacement reaction. The products formed are hydrogen gas and a compound of zinc and sodium. Hence, the correct answer is (B) Sodium zincate

Answer 2

During the reaction of 1, 2-dibromoethane with Zn dust, dehalogenation of the alkane takes place to form ethene as: (Br)CH2−CH2(Br)+Zn→CH2=CH2+ZnBr2.

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