Name a carbon containing molecule which has two double bonds.

100 A zinc plate was kept in a glass container having CuS04 Solution. On examining it was found that the blue colour of the solution is getting lighter and lighter. After a few days, when the zinc plate was taken out of the solution, a number of small holes were noticed in it. State the reason and give chemical equation of the reaction involved. 1 What is the name of the chemical bond formed:

(a) by the sharing of electrons between two atoms?

(b) by the transfer of electrons from one atom to another?

3 What would be the electron-dot structure of carbon dioxide which has the formula CO₂? 4 What type of chemical bond is formed between:

(a) potassium and bromine?

(b) carbon and bromine?