Which one is more polar, cis-2-butene or trans-2-butene.

If one mole of $\mathrm{HBr}$ is added to the following compounds, write down the structures of the product/products expected to the formed.

Buta-1, 3-diene

If one mole of $\mathrm{HBr}$ is added to the following compounds, write down the structures of the product/products expected to the formed.

Penta-1, 3-diene

If one mole of $\mathrm{HBr}$ is added to the following compounds, write down the structures of the product/products expected to the formed.

Penta-1, 2-diene

If one mole of $\mathrm{HBr}$ is added to the following compounds, write down the structures of the product/products expected to the formed:

Hept-1-ene.